Circuit to compensate for deficit of output characteristics of a

Details Circuit to compensate for deficit of output characteristics of a Circuit to compensate for deficit of output characteristics of a

1981-06-25

1983-12-13

Rubinson, G. Z.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

179121D, H04B 1500

Patent

active

044206550

ABSTRACT:
A circuit for compensating for frequency characteristic of microphone output which is arranged to have a combination of a microphone member of the pressure gradient type having a proximity effect represented by a rise in its low frequency range sensitivity as the microphone member approaches closer to a source of sound, and another microphone member of the pressure type developing no proximity effect, to cancel out the occurrence of proximity effect. A change in sensitivity of the pressure gradient type microphone in the low frequency range due to the proximity effect is determined from the level difference between the outputs of the two microphones. A signal representative of the difference is subtracted from the output of the pressure gradient type microphone thereby to effect a compensation for the proximity effect in the output of the pressure gradient type microphone.

REFERENCES:
patent: 4006310 (1977-02-01), Bayer
patent: 4066842 (1978-01-01), Allen
patent: 4131760 (1978-12-01), Christensen et al.
patent: 4239936 (1980-12-01), Sakoe
patent: 4266099 (1981-05-01), Kayalioglu
patent: 4322579 (1982-03-01), Kleis et al.
patent: 4357488 (1982-11-01), Knighton et al.

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