Question

how does the speed of sound change for mediums of diofferent elasticities, densities, and tempertures

Answer 1

Since this is not my area of expertise, I searched Google under the key words "sound speed variables" to get these possible sources:

http://www.dosits.org/science/sndmoves/1.htm
http://en.wikipedia.org/wiki/Speed_of_sound

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.