Trap for controlling standing waves in rooms

Details Trap for controlling standing waves in rooms Trap for controlling standing waves in rooms

1994-01-04

1995-08-22

Dang, Khanh

Acoustics

Sound-modifying means

Space absorbers

E04B 182

Patent

active

054441986

ABSTRACT:
This invention is an improved bass trap for controlling standing waves in the listening room. It is cylindrical in shape, with a curved diffuser around one half of the length of the cylinder. The interior of the cylinder is divided into two hemi-cylinders, with one hemi-cylinder made of an absorbing material positioned opposite the curved diffuser, and one hemi-cylinder, which is an air cavity, defined by the boundary of the absorbing material on one side and the diffuser on the other. This device features a ported top, with the ports positioned over the air cavity, which allow tuning pipes of varying length and diameter to be inserted, in order to permit further tuning of the device.

REFERENCES:
patent: 4319661 (1982-03-01), Proudfoot
patent: 4548292 (1985-10-01), Noxon
patent: 5035298 (1991-07-01), Noxon
patent: 5137111 (1992-08-01), Diduck et al.
patent: 5210383 (1993-05-01), Noxon

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