Hybrid amplitude-phase grating diffusers

Details Hybrid amplitude-phase grating diffusers Hybrid amplitude-phase grating diffusers

2005-08-11

2008-09-30

Martin, Edgardo San (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S292000

Reexamination Certificate

active

07428948

ABSTRACT:
A room acoustic diffuser exploits interference, by reflecting waves out-of-phase with the specular energy, making it possible to diminish specular energy. This is achieved by using a diffuser based on a ternary sequence, which nominally has reflection coefficients of 0, −1 and +1. A method for obtaining the design sequence for Quaternary diffusers is also disclosed. Also, design methods for forming the sequences into arrays, and forming hemispherical diffusers are explained.

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