Speed Sound Gases

Reference data and engineering information about speed sound gases for acoustics applications.

Overview

Engineering reference data for Speed Sound Gases in acoustics.

Key Formulas

Speed of Sound

$c = \sqrt{\gamma R T}$

Speed of sound in an ideal gas.

Wavelength

$\lambda = c / f$

Wavelength = speed / frequency.

Variables

Symbol	Description	Unit
$c$	Speed of sound	m/s
$L$	Sound level	dB
$\lambda$	Wavelength	m
$f$	Frequency	Hz

Dependence on Gas Properties

The speed of sound in a gas is determined by its density and bulk modulus elasticity. A lower density or a higher bulk modulus generally leads to a higher speed of sound.

Speed is a scalar quantity representing magnitude only, while velocity is a vector quantity that includes direction. In acoustics, the term "speed of sound" is used, as sound propagation in gases is typically isotropic under uniform conditions.

References

Original Source