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December 17th, 2017, 05:16 AM   #1
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Speed of sound

I was listening to thunderclaps whilst I was sleeping in bed, very loud ones which I thought were explosions.

Something about it was very engine-like.

Very very loud I thought I was in Iraq.

So I was thinking what if you applied heat energy to a sound wave. How fast would it go?

Sound waves are all about the same speed if I remember.

I looked online, and I saw only sound effects for heat.

Maybe some users here have some knowledge about this?

What I do appreciate is that during a sonic boom, there are some heat transfers involved when you break Mach 1.

If you apply considerable heat to a sound wave, what happens?

Perhaps sound is just vibrations from what I remember. Maybe it is a wave too.

Or if you apply enough energy to a radio wave - I know that these are waves for sure.
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December 17th, 2017, 09:59 AM   #2
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How would you apply heat to the sound wave? What does that even mean?

Do you mean heating up the medium the wave is travelling in?

In general, heating a material decreases its density. In general (and perhaps always), the speed of sound is slower in a less dense material.
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Last edited by skipjack; December 27th, 2017 at 04:02 PM.
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December 17th, 2017, 12:07 PM   #3
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Sound waves are adiabatic, which means that they are faster than heat can be transferred.

Here is some maths that would be taught at last year high school/first year university in the UK.

Adiabatic Compressibility, Adiabatic Expansion
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December 27th, 2017, 02:17 PM   #4
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It's not a matter of "adding heat to the sound" wave but rather heating the medium, air or water, etc.

Quote:
Perhaps sound is just vibrations from what I remember. Maybe it is a wave too.
.
Yes, sound is vibrations in the medium- and that is exactly what a wave is!
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