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Old Mar 30th 2017, 12:31 AM   #1
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Sound

How and why does loudness of sound depend on the medium?
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Old Mar 31st 2017, 09:35 AM   #2
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You have to be careful what you mean by loudness.

Do you mean perceived loudness (what you actually hear)?
The transfer of sound from one medium to another (e.g. air to water) is generally quite poor.
The energy transfer from the air outside ear to the water inside the ear requires quite a complex arrangement of fulcrums and levers to achieve good efficiency.
This arrangement is tailored to work in air, and works less well if you are immersed in other mediums.

If you mean the energy required to create pressure waves of a certain amplitude within the medium, then this is simply a function of the mechanical properties of the medium.
How compressible is the material, how elastic is it, etc...
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Old Apr 1st 2017, 09:07 AM   #3
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Thank you so very much. I got it.
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