# Velocity of sound in gases

1. ### Magnitude

1
Why is velocity of sound in gases independent of pressure?

2. ### technician

Depends on speed of molecules.
Speed of molecules depends on temperature.

3. ### Bobbywhy

1,908
“At a constant temperature, the ideal gas pressure has no effect on the speed of sound, because pressure and density (also proportional to pressure) have equal but opposite effects on the speed of sound, and the two contributions cancel out exactly.”
http://en.wikipedia.org/wiki/Speed_of_sound