The time, frequency, and polar energy response of flat panels, with and without distributed absorption, mono- and bi-cylindrical columns and reflecting phase grating diffusers were measured, using a boundary measurement technique based on time-delay spectrometry. Energy-time curves, directivity-energy-frequency curves, frequency-directivity contours, and conventional octave-averaged polar patterns are presented for 0° and 45° incidence. Experimental data indicates that of all of the scattering surfaces studied, only the reflection phase grating possesses all of the properties of an ideal diffuser.

Authors: D'Antonio, Peter; Konnert, John H.
Affiliation: RPG Diffusor Systems, Inc., Largo, MD
AES Convention: 79 (October 1985) Paper Number: 2295
Publication Date: October 1, 1985 Import into BibTeX
Subject: Acoustics and Sound Reinforcement
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=11460

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