Porting

Details Porting Porting

1996-10-29

1998-02-03

Lee, Eddie C.

Acoustics

Diaphragm and enclosure

Reflex baffle

181145, 181148, 181199, H05K 500

Patent

active

057147213

ABSTRACT:
A loudspeaker enclosure has an inside volume. At least one port characterized by predetermined mass intercouples the inside volume and the region outside the enclosure. Each port has a smoothly flared input end within the inside volume and smoothly flared output end adjacent to the region outside the inside volume. The port defines a boundary between the acoustic mass therein and the inside volume, the boundary typically being defined by an ellipse, and in a particular form by the rotation of an ellipse about the axis of a port. Typically, the length of the port corresponds substantially to the major diameter of the ellipse.

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Fluid Mechanics, Viscous Flow in Ducts, pp. 335-336, 348, 360-365, 404-411.
Lyle F. Yerges, "Sound, Noise, and Vibration Control" Sep. 1969, pp. 33-69.

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