Virtual microphone apparatus and method

Details Virtual microphone apparatus and method Virtual microphone apparatus and method

1990-08-21

1991-09-24

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

H04B 106

Patent

active

050519646

ABSTRACT:
An apparatus and method for producing an output signal representing a sound pressure at a predetermined position wherein a first microphone is provided for producing a first output signal representing a sound pressure P.sub.0 at a first position; a second microphone is provided for producing a second output signal representing a sound pressure P.sub.1 at a second position; and a signal processing circuit is provided for producing the output signal based upon the first output signal and the second output signal; wherein the signal processing circuit is operative to produce the output signal proportional to: (i) a power function of the second output signal based on an exponent m corresponding to a distance between the first microphone and the predetermined position, multiplied by (ii) a power function of the first output signal based on an exponent representing a value obtained by subtracting at least the exponent m of the power function of the second output signal from 1.

REFERENCES:
Urick, Principles of Underwater Sound, Mar. 1984, pp. 102-103.

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