# Speeds of sounds through mediums

• February 28th, 2007, 03:22 AM
Tabasco_Sauce
Speeds of sounds through mediums
Sooooo we all know sound travels more quickly through mediums with higher densities and temperatures.

I was wondering if sound could travel faster through an extreemly dense solid, or an extreemly hot plasma (or something)

Has this ever been tested? My guess is it really depends on how hot or dense a medium is, but is there a limit to how dense or how hot something (something as in anything) can get?
• February 28th, 2007, 04:35 AM
leohopkins
Re: Speeds of sounds through mediums
Quote:

Originally Posted by Tabasco_Sauce
Sooooo we all know sound travels more quickly through mediums with higher densities and temperatures.

I was wondering if sound could travel faster through an extreemly dense solid, or an extreemly hot plasma (or something)

Has this ever been tested? My guess is it really depends on how hot or dense a medium is, but is there a limit to how dense or how hot something (something as in anything) can get?

There is no limit, so it is entirely possible that the speed of sound could be the SAME as the speed of light inside the singularity of a blackhole (which has infinate density)
• February 28th, 2007, 08:23 AM
Farsight
And they'd both be zero!
• February 28th, 2007, 05:25 PM
It really does not matter how dense the medium is, the speed of sound cannot approach that of light, sound is merely a compression wave travelling through a medium, the atoms physically move, since they are matter, they cannot travel at light speed.
• March 1st, 2007, 08:22 AM
Farsight
By the by, does anybody know offhand what happens to the speed of sound for a material that is placed under tension? Or anything about transverse wave velocity v compression wave velocity in a material under tension?
• March 1st, 2007, 08:44 AM
anandsatya
Speed of sound in a medium depends on bulk modulus of elasticity and dunsity.
B=Bulk modulus of elasticity
V=(B/(density))^(1/2)
• March 1st, 2007, 08:47 AM
anandsatya
Quote:

Originally Posted by Farsight
By the by, does anybody know offhand what happens to the speed of sound for a material that is placed under tension? Or anything about transverse wave velocity v compression wave velocity in a material under tension?

V=speed of sound
x=mass per unit length
T=Tension in the string

V=(T/x)^(1/2)
• March 1st, 2007, 11:57 AM
Farsight
Thanks anandsatya.
• March 3rd, 2007, 03:51 AM