If sound is a longitudinal wave, why can we hear it if our ears aren't aligned with the propagation...












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If a sound wave travels to the right, then the air molecules inside only vibrate left and right, because sound is a longitudinal wave. This is only a one-dimensional motion. If our ears are oriented perpendicular to this oscillation, e.g. if they are pointing straight up, how can we hear it?






waves acoustics







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    $begingroup$
    it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
    $endgroup$
    – anna v
    yesterday






  • 2




    $begingroup$
    This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
    $endgroup$
    – Farcher
    yesterday






  • 2




    $begingroup$
    Here's another pretty good explanation with animations, courtesy of the University of Southampton.
    $endgroup$
    – Ilmari Karonen
    yesterday










  • $begingroup$
    Consider thinking about it in polar coordinates, and the one dimension being r.
    $endgroup$
    – corsiKa
    16 hours ago










  • $begingroup$
    @Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
    $endgroup$
    – user170231
    14 hours ago
















9












$begingroup$


If a sound wave travels to the right, then the air molecules inside only vibrate left and right, because sound is a longitudinal wave. This is only a one-dimensional motion. If our ears are oriented perpendicular to this oscillation, e.g. if they are pointing straight up, how can we hear it?






waves acoustics







share|cite|improve this question









New contributor




Sarvesh Thiruppathi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$








  • 2




    $begingroup$
    it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
    $endgroup$
    – anna v
    yesterday






  • 2




    $begingroup$
    This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
    $endgroup$
    – Farcher
    yesterday






  • 2




    $begingroup$
    Here's another pretty good explanation with animations, courtesy of the University of Southampton.
    $endgroup$
    – Ilmari Karonen
    yesterday










  • $begingroup$
    Consider thinking about it in polar coordinates, and the one dimension being r.
    $endgroup$
    – corsiKa
    16 hours ago










  • $begingroup$
    @Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
    $endgroup$
    – user170231
    14 hours ago














9












9








9


2



$begingroup$


If a sound wave travels to the right, then the air molecules inside only vibrate left and right, because sound is a longitudinal wave. This is only a one-dimensional motion. If our ears are oriented perpendicular to this oscillation, e.g. if they are pointing straight up, how can we hear it?






waves acoustics







share|cite|improve this question









New contributor




Sarvesh Thiruppathi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




If a sound wave travels to the right, then the air molecules inside only vibrate left and right, because sound is a longitudinal wave. This is only a one-dimensional motion. If our ears are oriented perpendicular to this oscillation, e.g. if they are pointing straight up, how can we hear it?






waves acoustics




waves acoustics






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Sarvesh Thiruppathi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|cite|improve this question









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edited 27 mins ago









knzhou

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asked yesterday









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  • 2




    $begingroup$
    it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
    $endgroup$
    – anna v
    yesterday






  • 2




    $begingroup$
    This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
    $endgroup$
    – Farcher
    yesterday






  • 2




    $begingroup$
    Here's another pretty good explanation with animations, courtesy of the University of Southampton.
    $endgroup$
    – Ilmari Karonen
    yesterday










  • $begingroup$
    Consider thinking about it in polar coordinates, and the one dimension being r.
    $endgroup$
    – corsiKa
    16 hours ago










  • $begingroup$
    @Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
    $endgroup$
    – user170231
    14 hours ago














  • 2




    $begingroup$
    it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
    $endgroup$
    – anna v
    yesterday






  • 2




    $begingroup$
    This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
    $endgroup$
    – Farcher
    yesterday






  • 2




    $begingroup$
    Here's another pretty good explanation with animations, courtesy of the University of Southampton.
    $endgroup$
    – Ilmari Karonen
    yesterday










  • $begingroup$
    Consider thinking about it in polar coordinates, and the one dimension being r.
    $endgroup$
    – corsiKa
    16 hours ago










  • $begingroup$
    @Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
    $endgroup$
    – user170231
    14 hours ago








2




2




$begingroup$
it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
$endgroup$
– anna v
yesterday




$begingroup$
it is not that simple . see hyperphysics.phy-astr.gsu.edu/hbase/Sound/sprop.html and links
$endgroup$
– anna v
yesterday




2




2




$begingroup$
This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
$endgroup$
– Farcher
yesterday




$begingroup$
This website has some nice animations to show the three dimensional nature of longitudinal sound waves.
$endgroup$
– Farcher
yesterday




2




2




$begingroup$
Here's another pretty good explanation with animations, courtesy of the University of Southampton.
$endgroup$
– Ilmari Karonen
yesterday




$begingroup$
Here's another pretty good explanation with animations, courtesy of the University of Southampton.
$endgroup$
– Ilmari Karonen
yesterday












$begingroup$
Consider thinking about it in polar coordinates, and the one dimension being r.
$endgroup$
– corsiKa
16 hours ago




$begingroup$
Consider thinking about it in polar coordinates, and the one dimension being r.
$endgroup$
– corsiKa
16 hours ago












$begingroup$
@Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
$endgroup$
– user170231
14 hours ago




$begingroup$
@Farcher "Find a wide space and make shure there's nobody around you." Pun intended?
$endgroup$
– user170231
14 hours ago










5 Answers
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vibration is only a one dimensional motion




This is not generally true. As a trivial example, one could the movements of water in a pond where a few small rocks have been tossed. The motion is definitely a wave behavior, and could even be called vibration, but it is most definitely not one dimensional.



Another potential example would be the vibrator on your phone, which vibrates in a circular manner.



But in the end, the key is that atoms in a sound wave don't vibrate "left and right." They are a longitudinal wave, in which particles move in the direction of the wave's motion and back.



So when something causes a sound, the waves propagate outward from the object creating the sound, as molecules of gas move away from the source and towards the source. This is typically a 3 dimensional pattern






share|cite|improve this answer









$endgroup$













  • $begingroup$
    Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday










  • $begingroup$
    Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday






  • 1




    $begingroup$
    @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
    $endgroup$
    – Kyle
    yesterday










  • $begingroup$
    But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday






  • 2




    $begingroup$
    @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
    $endgroup$
    – dbmag9
    yesterday



















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$begingroup$

Sound wave is not a transverse wave, as you thought. That means the vibration and the direction of propagation for sound wave are parallel. And the vibration is caused by difference in air pressure at different places. To the question "how I can listen to it" thats because the pressure difference propagates toward your ear and force your eardrum to vibrate.






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  • 1




    $begingroup$
    Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday








  • 2




    $begingroup$
    Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
    $endgroup$
    – peterh
    23 hours ago








  • 1




    $begingroup$
    "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
    $endgroup$
    – knzhou
    28 mins ago










  • $begingroup$
    @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
    $endgroup$
    – Aaron Stevens
    25 mins ago










  • $begingroup$
    The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
    $endgroup$
    – user10842694
    18 mins ago





















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Sound travels outwards from a source in all directions. The waves that are set in motion are spherical.






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$endgroup$









  • 2




    $begingroup$
    Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
    $endgroup$
    – amI
    yesterday



















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$begingroup$

Re. from one of your comments: "But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre" and also this one: "But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop"



I think part of you confusion comes from this: Even with a longitudinal wave where the particle motion is parallel to the waves propagation direction, the particles do not travel with the wave. They only move back and forth along the direction of wave propagation. So the particles are not carried along with the wave. (It is obvious that this is true for a transverse wave.)



Referring to your original question, unless sound is focused into a beam it generally propagates equally in all directions. If it is focused into a beam and you were off to one side anything you hear would be due to sidelobes which are lower in amplitude than the main lobe and could be near zero.






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    You could use an explosion as a metaphor. The shockwaves "push" the air around in a spherical pattern, which then gets "sucked" back due to the low pressure left behind.



    In a sense, soundwaves are just very slow and small shockwaves.



    This video shows it really well.






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    • $begingroup$
      +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
      $endgroup$
      – Kevin
      22 hours ago











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    5 Answers
    5






    active

    oldest

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    5 Answers
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    active

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    11












    $begingroup$


    vibration is only a one dimensional motion




    This is not generally true. As a trivial example, one could the movements of water in a pond where a few small rocks have been tossed. The motion is definitely a wave behavior, and could even be called vibration, but it is most definitely not one dimensional.



    Another potential example would be the vibrator on your phone, which vibrates in a circular manner.



    But in the end, the key is that atoms in a sound wave don't vibrate "left and right." They are a longitudinal wave, in which particles move in the direction of the wave's motion and back.



    So when something causes a sound, the waves propagate outward from the object creating the sound, as molecules of gas move away from the source and towards the source. This is typically a 3 dimensional pattern






    share|cite|improve this answer









    $endgroup$













    • $begingroup$
      Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday










    • $begingroup$
      Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 1




      $begingroup$
      @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
      $endgroup$
      – Kyle
      yesterday










    • $begingroup$
      But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 2




      $begingroup$
      @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
      $endgroup$
      – dbmag9
      yesterday
















    11












    $begingroup$


    vibration is only a one dimensional motion




    This is not generally true. As a trivial example, one could the movements of water in a pond where a few small rocks have been tossed. The motion is definitely a wave behavior, and could even be called vibration, but it is most definitely not one dimensional.



    Another potential example would be the vibrator on your phone, which vibrates in a circular manner.



    But in the end, the key is that atoms in a sound wave don't vibrate "left and right." They are a longitudinal wave, in which particles move in the direction of the wave's motion and back.



    So when something causes a sound, the waves propagate outward from the object creating the sound, as molecules of gas move away from the source and towards the source. This is typically a 3 dimensional pattern






    share|cite|improve this answer









    $endgroup$













    • $begingroup$
      Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday










    • $begingroup$
      Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 1




      $begingroup$
      @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
      $endgroup$
      – Kyle
      yesterday










    • $begingroup$
      But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 2




      $begingroup$
      @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
      $endgroup$
      – dbmag9
      yesterday














    11












    11








    11





    $begingroup$


    vibration is only a one dimensional motion




    This is not generally true. As a trivial example, one could the movements of water in a pond where a few small rocks have been tossed. The motion is definitely a wave behavior, and could even be called vibration, but it is most definitely not one dimensional.



    Another potential example would be the vibrator on your phone, which vibrates in a circular manner.



    But in the end, the key is that atoms in a sound wave don't vibrate "left and right." They are a longitudinal wave, in which particles move in the direction of the wave's motion and back.



    So when something causes a sound, the waves propagate outward from the object creating the sound, as molecules of gas move away from the source and towards the source. This is typically a 3 dimensional pattern






    share|cite|improve this answer









    $endgroup$




    vibration is only a one dimensional motion




    This is not generally true. As a trivial example, one could the movements of water in a pond where a few small rocks have been tossed. The motion is definitely a wave behavior, and could even be called vibration, but it is most definitely not one dimensional.



    Another potential example would be the vibrator on your phone, which vibrates in a circular manner.



    But in the end, the key is that atoms in a sound wave don't vibrate "left and right." They are a longitudinal wave, in which particles move in the direction of the wave's motion and back.



    So when something causes a sound, the waves propagate outward from the object creating the sound, as molecules of gas move away from the source and towards the source. This is typically a 3 dimensional pattern







    share|cite|improve this answer












    share|cite|improve this answer



    share|cite|improve this answer










    answered yesterday









    Cort AmmonCort Ammon

    23.5k34779




    23.5k34779












    • $begingroup$
      Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday










    • $begingroup$
      Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 1




      $begingroup$
      @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
      $endgroup$
      – Kyle
      yesterday










    • $begingroup$
      But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 2




      $begingroup$
      @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
      $endgroup$
      – dbmag9
      yesterday


















    • $begingroup$
      Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday










    • $begingroup$
      Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 1




      $begingroup$
      @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
      $endgroup$
      – Kyle
      yesterday










    • $begingroup$
      But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday






    • 2




      $begingroup$
      @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
      $endgroup$
      – dbmag9
      yesterday
















    $begingroup$
    Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday




    $begingroup$
    Hi, Thanks for the answer , it was really helpful. I still have doubt in the last paragraph of your answer. Can you explain it with more details. Also I never said that sound wave is a transverse wave , by left and right i meant to - and - fro.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday












    $begingroup$
    Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday




    $begingroup$
    Also , by 3 dimensional pattern , you mean a spherical kind of pattern , right ? But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday




    1




    1




    $begingroup$
    @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
    $endgroup$
    – Kyle
    yesterday




    $begingroup$
    @SarveshThiruppathi In a sense, yes, as the particles move apart it creates a low pressure region, but this acts as the restoring force to bring them back together. These pressure variations are usually very small, though. For example, a typical conversation between 2 people generates pressure variations of about 2*10^-7 atmospheres.
    $endgroup$
    – Kyle
    yesterday












    $begingroup$
    But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday




    $begingroup$
    But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday




    2




    2




    $begingroup$
    @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
    $endgroup$
    – dbmag9
    yesterday




    $begingroup$
    @SarveshThiruppathi If a sound wave is emitted for a long period of time, that means the source of the sound is vibrating for a long period of time. The wavelength would still be the same as if the same sound were emitted for a short period of time, so the vacuum you're imagining between waves wouldn't exist. What does make a difference is the volume (loudness) of the sound, which is why (roughly) there is a maximum possible volume which is reached when there is a vacuum between each wave.
    $endgroup$
    – dbmag9
    yesterday











    9












    $begingroup$

    Sound wave is not a transverse wave, as you thought. That means the vibration and the direction of propagation for sound wave are parallel. And the vibration is caused by difference in air pressure at different places. To the question "how I can listen to it" thats because the pressure difference propagates toward your ear and force your eardrum to vibrate.






    share|cite|improve this answer








    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$









    • 1




      $begingroup$
      Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday








    • 2




      $begingroup$
      Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
      $endgroup$
      – peterh
      23 hours ago








    • 1




      $begingroup$
      "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
      $endgroup$
      – knzhou
      28 mins ago










    • $begingroup$
      @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
      $endgroup$
      – Aaron Stevens
      25 mins ago










    • $begingroup$
      The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
      $endgroup$
      – user10842694
      18 mins ago


















    9












    $begingroup$

    Sound wave is not a transverse wave, as you thought. That means the vibration and the direction of propagation for sound wave are parallel. And the vibration is caused by difference in air pressure at different places. To the question "how I can listen to it" thats because the pressure difference propagates toward your ear and force your eardrum to vibrate.






    share|cite|improve this answer








    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$









    • 1




      $begingroup$
      Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday








    • 2




      $begingroup$
      Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
      $endgroup$
      – peterh
      23 hours ago








    • 1




      $begingroup$
      "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
      $endgroup$
      – knzhou
      28 mins ago










    • $begingroup$
      @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
      $endgroup$
      – Aaron Stevens
      25 mins ago










    • $begingroup$
      The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
      $endgroup$
      – user10842694
      18 mins ago
















    9












    9








    9





    $begingroup$

    Sound wave is not a transverse wave, as you thought. That means the vibration and the direction of propagation for sound wave are parallel. And the vibration is caused by difference in air pressure at different places. To the question "how I can listen to it" thats because the pressure difference propagates toward your ear and force your eardrum to vibrate.






    share|cite|improve this answer








    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$



    Sound wave is not a transverse wave, as you thought. That means the vibration and the direction of propagation for sound wave are parallel. And the vibration is caused by difference in air pressure at different places. To the question "how I can listen to it" thats because the pressure difference propagates toward your ear and force your eardrum to vibrate.







    share|cite|improve this answer








    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.









    share|cite|improve this answer



    share|cite|improve this answer






    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.









    answered yesterday









    user10842694user10842694

    1072




    1072




    New contributor




    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





    New contributor





    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    user10842694 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.








    • 1




      $begingroup$
      Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday








    • 2




      $begingroup$
      Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
      $endgroup$
      – peterh
      23 hours ago








    • 1




      $begingroup$
      "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
      $endgroup$
      – knzhou
      28 mins ago










    • $begingroup$
      @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
      $endgroup$
      – Aaron Stevens
      25 mins ago










    • $begingroup$
      The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
      $endgroup$
      – user10842694
      18 mins ago
















    • 1




      $begingroup$
      Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
      $endgroup$
      – Sarvesh Thiruppathi
      yesterday








    • 2




      $begingroup$
      Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
      $endgroup$
      – peterh
      23 hours ago








    • 1




      $begingroup$
      "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
      $endgroup$
      – knzhou
      28 mins ago










    • $begingroup$
      @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
      $endgroup$
      – Aaron Stevens
      25 mins ago










    • $begingroup$
      The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
      $endgroup$
      – user10842694
      18 mins ago










    1




    1




    $begingroup$
    Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday






    $begingroup$
    Hi, I would like to point out two things from your answer. I never said a sound is a transverse wave. Also can you provide a explanation of how the sound wave propagated towards us.
    $endgroup$
    – Sarvesh Thiruppathi
    yesterday






    2




    2




    $begingroup$
    Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
    $endgroup$
    – peterh
    23 hours ago






    $begingroup$
    Note, sound can be also a transverse wave, but only in solid materials (others don't have a shear stress). It has different properties than the longitudinal sound. This is how the internal properties of the Earth were discovered (liquid mantle, solid core). Also the electromagnetic and gravitational fields propagate as transverse waves.
    $endgroup$
    – peterh
    23 hours ago






    1




    1




    $begingroup$
    "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
    $endgroup$
    – knzhou
    28 mins ago




    $begingroup$
    "Sound wave is not a transverse wave, as you thought." This is nowhere in the OP's statement. As far as I'm concerned, this answer doesn't address the question at all.
    $endgroup$
    – knzhou
    28 mins ago












    $begingroup$
    @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
    $endgroup$
    – Aaron Stevens
    25 mins ago




    $begingroup$
    @knzhou I agree. -1. I'm not sure how this has gotten so many up votes
    $endgroup$
    – Aaron Stevens
    25 mins ago












    $begingroup$
    The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
    $endgroup$
    – user10842694
    18 mins ago






    $begingroup$
    The guy eventually changed his questions, check the first question he asked. Then my answer adreses it.
    $endgroup$
    – user10842694
    18 mins ago













    6












    $begingroup$

    Sound travels outwards from a source in all directions. The waves that are set in motion are spherical.






    share|cite|improve this answer









    $endgroup$









    • 2




      $begingroup$
      Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
      $endgroup$
      – amI
      yesterday
















    6












    $begingroup$

    Sound travels outwards from a source in all directions. The waves that are set in motion are spherical.






    share|cite|improve this answer









    $endgroup$









    • 2




      $begingroup$
      Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
      $endgroup$
      – amI
      yesterday














    6












    6








    6





    $begingroup$

    Sound travels outwards from a source in all directions. The waves that are set in motion are spherical.






    share|cite|improve this answer









    $endgroup$



    Sound travels outwards from a source in all directions. The waves that are set in motion are spherical.







    share|cite|improve this answer












    share|cite|improve this answer



    share|cite|improve this answer










    answered yesterday









    niels nielsenniels nielsen

    20.4k53061




    20.4k53061








    • 2




      $begingroup$
      Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
      $endgroup$
      – amI
      yesterday














    • 2




      $begingroup$
      Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
      $endgroup$
      – amI
      yesterday








    2




    2




    $begingroup$
    Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
    $endgroup$
    – amI
    yesterday




    $begingroup$
    Yes -- even though a 'speaker' may push air molecules in a certain direction, this just creates a volume of higher pressure air, which then expands in all directions.
    $endgroup$
    – amI
    yesterday











    5












    $begingroup$

    Re. from one of your comments: "But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre" and also this one: "But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop"



    I think part of you confusion comes from this: Even with a longitudinal wave where the particle motion is parallel to the waves propagation direction, the particles do not travel with the wave. They only move back and forth along the direction of wave propagation. So the particles are not carried along with the wave. (It is obvious that this is true for a transverse wave.)



    Referring to your original question, unless sound is focused into a beam it generally propagates equally in all directions. If it is focused into a beam and you were off to one side anything you hear would be due to sidelobes which are lower in amplitude than the main lobe and could be near zero.






    share|cite|improve this answer









    $endgroup$


















      5












      $begingroup$

      Re. from one of your comments: "But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre" and also this one: "But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop"



      I think part of you confusion comes from this: Even with a longitudinal wave where the particle motion is parallel to the waves propagation direction, the particles do not travel with the wave. They only move back and forth along the direction of wave propagation. So the particles are not carried along with the wave. (It is obvious that this is true for a transverse wave.)



      Referring to your original question, unless sound is focused into a beam it generally propagates equally in all directions. If it is focused into a beam and you were off to one side anything you hear would be due to sidelobes which are lower in amplitude than the main lobe and could be near zero.






      share|cite|improve this answer









      $endgroup$
















        5












        5








        5





        $begingroup$

        Re. from one of your comments: "But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre" and also this one: "But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop"



        I think part of you confusion comes from this: Even with a longitudinal wave where the particle motion is parallel to the waves propagation direction, the particles do not travel with the wave. They only move back and forth along the direction of wave propagation. So the particles are not carried along with the wave. (It is obvious that this is true for a transverse wave.)



        Referring to your original question, unless sound is focused into a beam it generally propagates equally in all directions. If it is focused into a beam and you were off to one side anything you hear would be due to sidelobes which are lower in amplitude than the main lobe and could be near zero.






        share|cite|improve this answer









        $endgroup$



        Re. from one of your comments: "But when the air molecule from the centre keeps moving away ,won't there be a vacuum created at the centre" and also this one: "But if the sound wave is emitted for long periods, wouldn't there be a complete vacuum and the sound wave would stop"



        I think part of you confusion comes from this: Even with a longitudinal wave where the particle motion is parallel to the waves propagation direction, the particles do not travel with the wave. They only move back and forth along the direction of wave propagation. So the particles are not carried along with the wave. (It is obvious that this is true for a transverse wave.)



        Referring to your original question, unless sound is focused into a beam it generally propagates equally in all directions. If it is focused into a beam and you were off to one side anything you hear would be due to sidelobes which are lower in amplitude than the main lobe and could be near zero.







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered 18 hours ago









        user45664user45664

        1,2902825




        1,2902825























            2












            $begingroup$

            You could use an explosion as a metaphor. The shockwaves "push" the air around in a spherical pattern, which then gets "sucked" back due to the low pressure left behind.



            In a sense, soundwaves are just very slow and small shockwaves.



            This video shows it really well.






            share|cite|improve this answer








            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$













            • $begingroup$
              +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
              $endgroup$
              – Kevin
              22 hours ago
















            2












            $begingroup$

            You could use an explosion as a metaphor. The shockwaves "push" the air around in a spherical pattern, which then gets "sucked" back due to the low pressure left behind.



            In a sense, soundwaves are just very slow and small shockwaves.



            This video shows it really well.






            share|cite|improve this answer








            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$













            • $begingroup$
              +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
              $endgroup$
              – Kevin
              22 hours ago














            2












            2








            2





            $begingroup$

            You could use an explosion as a metaphor. The shockwaves "push" the air around in a spherical pattern, which then gets "sucked" back due to the low pressure left behind.



            In a sense, soundwaves are just very slow and small shockwaves.



            This video shows it really well.






            share|cite|improve this answer








            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            $endgroup$



            You could use an explosion as a metaphor. The shockwaves "push" the air around in a spherical pattern, which then gets "sucked" back due to the low pressure left behind.



            In a sense, soundwaves are just very slow and small shockwaves.



            This video shows it really well.







            share|cite|improve this answer








            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.









            share|cite|improve this answer



            share|cite|improve this answer






            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.









            answered 22 hours ago









            DanielDaniel

            211




            211




            New contributor




            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.





            New contributor





            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.






            Daniel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.












            • $begingroup$
              +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
              $endgroup$
              – Kevin
              22 hours ago


















            • $begingroup$
              +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
              $endgroup$
              – Kevin
              22 hours ago
















            $begingroup$
            +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
            $endgroup$
            – Kevin
            22 hours ago




            $begingroup$
            +1 - was going to post an answer explaining it via explosion. But... you might consider taking out "just very slow and small shockwaves" and replacing it with, "smaller, and usually either repeated or patterned shockwaves - a musical note is just small shockwaves in a specific timing pattern." or similar.
            $endgroup$
            – Kevin
            22 hours ago










            Sarvesh Thiruppathi is a new contributor. Be nice, and check out our Code of Conduct.










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            Albești (Vaslui)

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            Coordenadas: 46 42 ºN 27 33 ° L Albeşti      Comuna    Região histórica Moldávia Distrito Vaslui Área  - Total 59,10 km² População (2007)  - Total 3 303     • Densidade 55,9 hab./km² Sítio www.albesti.ro/ Albeşti é uma comuna romena localizada no distrito de Vaslui, na região de Moldávia. A comuna possui uma área de 59.10 km² e sua população era de 3303 habitantes segundo o censo de 2007. [ 1 ] Referências ↑ «População em 1 de janeiro de 2009». INSSE   Distrito de Vaslui da Romênia Municípios Vaslui | Bârlad | Huşi Cidades Murgeni | Negreşti Comunas Albeşti | Alexandru Vlahuţă | Arsura | Banca | Băcani | Băceşti | Bălteni | Berezeni | Blăgeşti | Bogdana | Bogdăneşti | Bogdăniţa | Boţeşti | Buneşti-Avereşti | Ciocani | Codăeşti | Coroieşti | Costeşti | Cozmeşti | Creţeşti | Dăneşti | Deleni | Deleşti | Dimitrie Cantemir | Dodeşti | Dragomireşti...
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