Headset for ambient noise suppression

Details Headset for ambient noise suppression Headset for ambient noise suppression

1987-03-05

1988-01-05

Buczinski, Stephen C.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

381 92, H04B 1500

Patent

active

H00004170

ABSTRACT:
The headset system utilizes the theory that unique sound waves can be added or subtracted without loss of information to attenuate the noise at the ear and mouthpiece, without lowering the noise level of the environment. This allows for clearer reception and transmission of communication. The system includes a directional microphone mounted on a headset/helmet, isolated from both voice and earphone output, level-setting and frequency tailoring circuits, and voltage summers and amplifiers. The microphone picks up the ambient noise, and the level-setting and frequency tailoring circuits produce a close approximation of the noise at the ear and mouthpiece (i.e., two separate matching circuits). This signal is then inverted (using an inverting buffer) to provide destructive interference.

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