Acoustic reproducing apparatus

Details Acoustic reproducing apparatus Acoustic reproducing apparatus

1981-06-01

1984-01-03

Pellinen, A. D.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Hearing aid

381 98, 181146, H04R 502

Patent

active

044244169

ABSTRACT:
An acoustic reproducing apparatus is provided which includes first and second channels and first and second speakers, all disposed in a housing with a sound path for acoustically coupling the first and second speakers. The sound path has disposed therein sound absorbing material which forms a low pass filter which operates to add the low frequency signal component of the first channel to the second channel and also operates to add the low frequency signal component of the second channel to the first channel to produce a composite low frequency signal with greater amplitude which is reproduced in phase by each of the first and second speakers.

REFERENCES:
patent: 3094587 (1963-06-01), Dow
patent: 3135349 (1964-06-01), Lahti
patent: 3892624 (1975-07-01), Shimada
patent: 3941931 (1976-03-01), Osakabe
patent: 3999020 (1976-12-01), Bastiaans et al.
patent: 4097689 (1978-06-01), Yamada et al.
patent: 4191852 (1980-03-01), Nishikawa
patent: 4218583 (1980-08-01), Poulo
patent: 4365688 (1982-12-01), Blose

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