Speed of Sound in Air
The speed of sound in a gas depends primarily on the temperature, and can be estimated using the following formula from the kinetic theory of gases:B.33
![$\displaystyle c = \sqrt{\gamma R_m T},
$](http://www.dsprelated.com/josimages_new/pasp/img3132.png)
![$ \gamma=1.4$](http://www.dsprelated.com/josimages_new/pasp/img2434.png)
![$ R_m=286$](http://www.dsprelated.com/josimages_new/pasp/img3133.png)
![$ T$](http://www.dsprelated.com/josimages_new/pasp/img42.png)
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