Active noise supressors and methods for use in the ear canal

Details Active noise supressors and methods for use in the ear canal Active noise supressors and methods for use in the ear canal

1995-06-05

1998-04-14

Kuntz, Curtis

Electrical audio signal processing systems and devices

Hearing protectors, electrical

381 71, 381 94, 381 686, H03B 2900, A61F 1106, H04R 2500

Patent

active

057402582

ABSTRACT:
A noise suppressor includes an input transducer and an output transducer adapted to be located in an ear canal. A housing is provided to support the transducers in the ear canal, and the housing provides an acoustically unobstructed passage from the entrance of the ear canal to the ear drum. The input transducer generates electrical signals in response to sound pressure waves entering the ear canal, and a portion of the electrical signal is processed to generate an inverse noise signal which is applied to the output transducer. Accordingly, the output transducer produces inverse noise pressure waves in order to reduce an undesired noise portion of the sound pressure waves reaching the ear drum. The sound pressure waves also reach the ear drum without significant alteration.

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