Enclosures for loudspeaker drive units

Details Enclosures for loudspeaker drive units Enclosures for loudspeaker drive units

1997-10-16

2000-02-01

Dang, Khanh

Acoustics

Diaphragm and enclosure

Reflex baffle

181199, H05K 500

Patent

active

060191880

ABSTRACT:
An enclosure (1) for a loudspeaker drive unit (5) comprises a chamber (2) defined by one or more walls (3), in which a loudspeaker drive unit (5) is to be mounted. A port member (4) defines a passageway providing fluid communication between the interior and the exterior of the chamber (2). The internal surface (9) of the port member (4) is, at least in part, of a coarse texture. A multiplicity of indentations (11) and/or peaks may provide the coarse texture. This reduces so-called "chuffing" noises caused by air movement through the port member.

REFERENCES:
patent: 4126204 (1978-11-01), Ogi et al.
patent: 4231445 (1980-11-01), Johnson
patent: 5012890 (1991-05-01), Nagi et al.
patent: 5025885 (1991-06-01), Froeschle
patent: 5150417 (1992-09-01), Stahl
patent: 5714721 (1998-02-01), Gawronski et al.
M Colloms, "High Performance Loudspeakers", 4th edition, published 1991, Pentach Press, pp. 122-123.

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