The asymmetric polar response of an in-situ microphone system requires calculation of the Directivity Index (DI) from the random incidence response. A technique is presented that enables diffuse field measurements to be performed, without a reverb chamber, in a moderately sized, untreated room over a reasonably wide bandwidth. Applications of this technique are given and results for different devices are shown.

Author: Struck, Christopher J.
Affiliation: ReSound Corporation, Redwood City, CA
AES Convention: 107 (September 1999) Paper Number: 4990
Publication Date: September 1, 1999
Session Subject: Microphone; Microphone Techniques

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