Acoustics – Diaphragm and enclosure – Reflex baffle
Patent
1995-11-30
1998-10-13
Dang, Khanh
Acoustics
Diaphragm and enclosure
Reflex baffle
181199, H05K 500
Patent
active
058214712
ABSTRACT:
The present acoustic system produces sounds over a broad range of frequencies, and includes an enclosure, a speaker acoustically connected to the enclosure, for generating, almost simultaneously, two sounds, a forward sound, and a rearward sound. It further includes a waveguide enclosed at least partly within the enclosure, and acoustically connected to the speaker, for defining an acoustic path along which the rearward sound travels. The waveguide includes a plurality of inner panels that are positioned inside the enclosure for optimizing the length of the travel path. The inner panels and the enclosure define a plurality of inner passageways having generally similar cross-sectional surface areas, and a plurality of inner openings, for causing a selective cancellation of sounds at predetermined frequencies, while preserving sounds at other frequencies.
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patent: 4128738 (1978-12-01), Gallery
patent: 4168761 (1979-09-01), Pappanikolaou
patent: 4398619 (1983-08-01), Daniel
patent: 4549631 (1985-10-01), Bose
patent: 4628528 (1986-12-01), Bose et al.
patent: 4924962 (1990-05-01), Terai et al.
patent: 5170435 (1992-12-01), Rosen et al.
patent: 5197103 (1993-03-01), Hayakawa
patent: 5373564 (1994-12-01), Spear et al.
Advertisement by Bose Corporation for "Wave radio", in Popular Science Magazine, Jul. 1996 issue.
Dang Khanh
Kassatly Samuel
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