Planar binary amplitude diffusor

Details Planar binary amplitude diffusor Planar binary amplitude diffusor

1997-03-05

1998-10-06

Dang, Khanh

Acoustics

Sound-modifying means

Space absorbers

181 30, E04B 182

Patent

active

058179925

ABSTRACT:
A two-dimensional binary amplitude diffusor (BAD) offering both absorption and modest diffusion is disclosed. The invention consists of a flat-faced panel with a series of alternating reflective and absorptive regions or patches defined by a binary sequence consisting of zeros and ones with a flat power spectrum, such as the Maximum Length Sequence (MLS) based upon shift register theory. Combining regions of absorption and reflection in the manner described herein results in an effective combination of absorption and diffusion.

REFERENCES:
patent: 2586797 (1952-02-01), Fisk et al.
patent: 3276537 (1966-10-01), Halbostad et al.
patent: 4303144 (1981-12-01), Wirt
patent: 4529637 (1985-07-01), Hankel
patent: 4821839 (1989-04-01), D'Antonio et al.
patent: 4821841 (1989-04-01), Woodward et al.

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