4-Channel headphones

Details 4-Channel headphones 4-Channel headphones

1975-03-04

1976-10-12

Cooper, William C.

179 1GQ, H04M 105, H04R 502

Patent

active

039848850

ABSTRACT:
A structure of four-channel headphones having sound insulating means between front and rear channel driver units, and tone control means only for the front channel tones, said sound insulating means being formed of foam material which transmits low-pitched tones and absorbs high-pitched tones. Separation of the front and the rear channel tones is improved to closely resemble four-channel sound reproduction in a free field and the output levels of the medium-high range tones of the two front channels are made variable.

REFERENCES:
patent: 3609240 (1971-09-01), Fixler
patent: 3794779 (1974-02-01), Greuzerd
patent: 3796840 (1974-03-01), Ohta

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