Larson Davis SoundAdvisor 831C Reference Manual page 253

Wavenumber (k)
SoundAdvisor Model 831C
where c is the sound speed and f is the frequency in Hz. It has the dimensions of length.
A number that is related to the wavelength of sound and is used to compare the size of objects rel-
ative to the wavelength or the time delay in sound propagation. It is related to wavelength
through the following equation
where l is the wavelength, c is the sound speed, f is the frequency in Hz, and w is the radian fre-
quency. It has the dimensions of inverse length.

2 2f
k = ----- - = -------- - = --- -

c c
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