Earphoning

Details Earphoning Earphoning

1989-10-27

1994-04-19

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 72, 381 94, G10K 1116, A61F 1102

Patent

active

053053877

ABSTRACT:
An earphone for use in an active noise reduction system includes a shell accommodating a microphone closely adjacent to a driver shaped and sized to fit in the concha of an ear.

REFERENCES:
patent: 3890474 (1975-06-01), Glicksberg
patent: 4870688 (1989-09-01), Voroba et al.
patent: 4985925 (1991-01-01), Langberg et al.

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