Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1979-01-11
1980-10-07
Olms, Douglas W.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
179 1E, 181144, 181155, H04R 502, H04R 102
Patent
active
042270502
ABSTRACT:
A virtual sound source system comprises a pair of speaker cabinets of unique design positioned along the front wall of a listening room. The speaker cabinets together with the front wall, sidewalls and ceiling of the room provide for playing back recordings of conventional stereo sound and converting them into the equivalent of binaural recordings through headphones at the ears of the listener. Each of the speaker cabinets has a rearwardly facing low frequency range speaker disposed on the rear thereof and an upwardly facing high frequency range speaker disposed below a parabolic reflector which disperses sound forwardly thereof. The low frequency sounds are reflected with huge wavefronts off either side of the front wall, sidewalls and ceiling of the room so as to converge onto the listening area thereof. The high frequency sounds are dispersed by the parabolic reflectors onto the sidewalls and ceiling of the room from which they reflect so as to converge onto the listening area. By such an arrangement, paths of sound are physically created in the listening room that propagate toward the listening area in a manner very similar to and in context with those present in a concert hall during a live performance. Such paths of sound enable a listener standing anywhere in the listening area to sense direction, distance, size and shape from the reproduced sound as though from the original source and with the realism of a live performance. Thus, the listener perceives sound from a virtual, rather than a real, sound source.
REFERENCES:
patent: 2921135 (1960-01-01), Hoodwin
patent: 3326321 (1967-06-01), Valuch
patent: 3582553 (1971-06-01), Bose
patent: 3727004 (1973-04-01), Bose
patent: 4033431 (1977-07-01), Ebejer
Matlago John T.
Olms Douglas W.
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