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# I have a sound travel question. Rather a question about sound travel! Answered

I'd take the time to look it up myself but I'm busy arguing with someone right now.

Does sound travel farther in cool air or warm air.  Use 50 deg. for cool and 100 deg. for warm air.  I don't care about speed just distance of similar sounds.  For sound use something like a normal speaking level?

So scientists which sound would go farther?

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## Discussions

.  In general, the denser something is the better it conducts sound. Eg, steel conducts better than water, water better than air. With that in mind, I'd guess that colder (denser) air would carry sound further. But I'm no scientist.
.  Googling "sound conduction" and "sound propagation" turn us some very interesting stuff.

I'm farther away. And it's warmer here. Stuff travels slower. etc.etc. excuses etc.

Oops, I thought you asked how fast. Sorry...

That's okay. I've often written answers to what I thought the question was then noticed "the rest of the question" that made my answer out in left field.

I'm sure I"ll do it many more times.

t, °C speed of sound
m/s km/h
-150 216,7 780,1
-100 263,7 949,2
-50 299,3 1077,6
-20 318,8 1147,8
-10 325,1 1170,3
0 331,5 1193,4
10 337,3 1214,1
20 343,1 1235,2
30 348,9 1256,2
50 360,3 1296,9
100 387,1 1393,7
200 436,0 1569,5
300 479,8 1727,4
400 520,0 1872,1
500 557,3 2006,4
1000 715,2 2574,8

Generally, speed of sound is a square root of Young's modulus divided by density, that is why NachoMahma says that the denser the thing is the higher the speed of sound. However, it doesn't refer to a hot thing and a cold thing, because we (I) don't know how Young's modulus changes with temperature...
Wow, it's a good problem for me to think about!