# Speed of sound

#### Dorky0

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.

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.

#### romsek

Math Team
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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#### studiot

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.