Field Recording Sourcebook..

Sound frequency vs wavelength (in)

The following little plot illustrates the correspondance between sound wavelength in inches and frequency in Hertz. It assumes conditions of 20 dC or 68 dF. Speed of sound at these conditions is 343 m/s or 1125 ft/s.
This may give a good idea of the frequency responce versus the dish diameter. A 22" dish corresponds to a frequency of 614 Hz, below that frequency there will be no "gain".

KJS 04/2025

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