Externally ported loudspeaker enclosure

Details Externally ported loudspeaker enclosure Externally ported loudspeaker enclosure

2007-05-15

2007-05-15

Le, Huyen (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

C381S338000, C381S349000

Reexamination Certificate

active

10729017

ABSTRACT:
An externally ported speaker enclosure includes a primary enclosure having a port or opening. The primary enclosure may continuously vary from a first dimension to a dimension of the port or opening. Alternatively, a duct or tube may extend from, and external to, the primary enclosure. The duct or tube may transition from a first dimension to a dimension of the port or opening. The dimensions of the port, primary enclosure, and transition from primary enclosure to port are configured to reinforce the low frequency response of a speaker mounted to the enclosure. A cylindrical primary enclosure may transition gradually or continuously to a port. The cylindrical primary enclosure can include a closed first end and an open port end. A speaker can be mounted to the cylindrical face of the primary enclosure. Alternatively, the speaker may be mounted parallel to an axis of the cylinder.

REFERENCES:
patent: 3952159 (1976-04-01), Schott
patent: 3978941 (1976-09-01), Siebert
patent: 4169516 (1979-10-01), Honda
patent: 5009281 (1991-04-01), Yokoyama
patent: 5012890 (1991-05-01), Nagi et al.
patent: 5173575 (1992-12-01), Furukawa
patent: 5710395 (1998-01-01), Wilke
patent: 6320972 (2001-11-01), Goller
patent: 6771787 (2004-08-01), Hoefler et al.
patent: 7011178 (2006-03-01), Morkerken

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