Acoustics

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Sound in fluids

The speed of sound in fluids can be determined using the following relation.

$c = \sqrt {\frac{K}{\rho}}$ where K - fluid bulk modulus, $?$ - fluid density, c - velocity of sound

Typical value of bulk modulus range from 2e9 to 2.5e9 N/m2. For a particular oil, with a density of 889 kg/m3,

speed of sound $c = \sqrt {\frac{2e9}{889}}= 1499.9 m/s$