Noise-cancelling telephone handset

Details Noise-cancelling telephone handset Noise-cancelling telephone handset

1994-07-25

1996-02-13

Hofsass, Jeffrey A.

Telephonic communications

Terminal

Housing or housing component

379434, 379430, H04M 100

Patent

active

054917476

ABSTRACT:
A radio or telephone handset configured with the usual transmitter and receiver ends and connecting handle is designed to have physical characteristics well adapted in its acoustic characteristics to complement noise cancellation circuitry. The receiver speaker is mounted in the receiver cap, and the cap is built with a domed, apertured earpiece extending from the exterior surface of said receiver cap. The dome fits into a user's outer ear, thereby to aid in positioning said handset on a user's ear. Openings radially placed on said receiver cap exterior surface and surrounding said earpiece, define an acoustic grill through which signal from said receiver speaker is passed substantially directly to said user's ear canal. Noise absorbing material is placed at strategic locations within the handset interior.

REFERENCES:
patent: 4087653 (1978-05-01), Frieder, Jr. et al.
patent: 4782527 (1988-11-01), Williamson et al.
patent: 5058154 (1991-10-01), Anderson
patent: 5182774 (1993-01-01), Bourk

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