Acoustics – Diaphragm and enclosure – Reflex baffle
Patent
1976-09-03
1979-09-25
Tomsky, Stephen J.
Acoustics
Diaphragm and enclosure
Reflex baffle
181152, 181194, 181199, H05K 500
Patent
active
041687612
ABSTRACT:
The disclosure concerns itself with labyrinth speakers systems which are provided with a plurality of internal partitions which are generally spaced from each other and are provided with apertures therein to form at least one tortuous path for a backwave generated by a loudspeaker. In one embodiment, the partitions are substantially cylindrical walls concentrically aligned with each other. The cylindrical walls have different diameters to form annular intermediate chambers. Other embodiments described include partitions which are planar and are substantially rectangular in shape. These partitions are spaced from each other along an axis of symmetry and are alternately provided with peripheral and central openings so that the backwave, while propagating between an initial and a final chamber of the enclosure, are successively broken up into a substantially annular shape and subsequently reconstituted. The intermediate chambers, including the apertures formed therein, substantially increase the overall surface area and form a tortuous path having an increased number of bends to thereby increase the effective length to the backwave.
REFERENCES:
patent: 2277525 (1942-03-01), Mercurius
patent: 3327808 (1967-06-01), Shaper
patent: 3523589 (1970-08-01), Virva
patent: 3529691 (1970-09-01), Wesemann
patent: 3993162 (1976-11-01), Juuti
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