"Ron Natalie" wrote in message
m...
Bob Noel wrote:

Thanks in advance.
The speed of sound varies with temperature alone.

The speed of sound varies with temperature and type of medium.

The speed of sound in air varies almost solely with
temperature. For other types of mediums, the temperature is
less of a factor. The general formula for the speed of sound
is the density divided by the bulk modulus. The issue is that
with gases the other variables in the equation all cancel each
other out.

In water for example, density is a MAJOR factor. The speed
of sound in salt water is faster than fresh water in addition
to temperature.

You're mixing apples and oranges. Water (H2O) does not equal salt water
(H2O + NaCl). They are two different media. Just as air is a nominal mix
of N + O + a few other gasses. Change that mix and it's a different media
with a different gamma and bulk modulus (R). So your density change is
really a change in media.

If the media doesn't change, density doesn't have an effect on the speed of
sound. Changing the media changes the gamma and R; but for any one specific
media, only temperature will cause a change in the speed of sound.

Gerry