Transducer with variable frequency response

Details Transducer with variable frequency response Transducer with variable frequency response

1975-10-29

1976-12-21

Cooper, William C.

179 1D, 1791155R, H04R 128

Patent

active

039990206

ABSTRACT:
An audio transducer for a headphone includes ports which couple the rear of the transducer diaphragm to the interior of the cup. A resilient acoustic damping material is placed over the ports and is variably compressed by an adjustable clamp to provide a selectable frequency response curve. Two embodiments of the adjustable clamp are shown, as well as the coupling means which extends through an opening in the headphone cup to allow convenient adjustment by the user.

REFERENCES:
patent: 3061690 (1962-10-01), Swinehart
patent: 3617654 (1971-11-01), Heidrich
patent: 3798393 (1974-03-01), Gorike

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