1976-06-14
1977-02-01
Stellar, George G.
179107FD, H04R 122, H04R 2500
Patent
active
040063216
ABSTRACT:
A transmission system is disclosed having an improved means for coupling sound to and from a transducer. The system includes a main sound channel and an associated cavity; damping elements are selectively positioned in or adjacent the cavity to provide a suitable acoustic impedance in the desired operating frequency range to effect a smooth acoustical operation.
REFERENCES:
patent: 2262146 (1941-11-01), Massa
patent: 2789651 (1957-04-01), Daniels
patent: 2865464 (1958-12-01), Gorike
patent: 3193048 (1965-07-01), Kohler
patent: 3835263 (1973-02-01), Killion
Aubel Leo J.
Industrial Research Products, Inc.
Stellar George G.
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