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Engineering Brief

Speech Intelligibility Advantages Using an Acoustic Beamformer Display

Authors: Begault, Durand; Sunder, Kaushik; Godfroy, Martine; Otto, Peter

AES Convention 139 · Paper 211 · October 2015

Abstract

A speech intelligibility test conforming to the Modified Rhyme Test of ANSI S3.2 “Method for Measuring the Intelligibility of Speech Over Communication Systems” was conducted using a prototype 12-channel acoustic beamformer system. The target speech material (signal) was identified against speech babble (noise), with calculated signal-noise ratios of 0, 5 and 10 dB. The signal was delivered at a fixed beam orientation of 135 degrees (re 90 degrees as the frontal direction of the array) and the noise at 135 (co-located) and 0 degrees (separated). A significant improvement in intelligibility from 58% to 75% was found for spatial separation for the same signal-noise ratio (0 dB). Significant effects for improved intelligibility due to spatial separation were also found for higher signal-noise ratios.

Details

Published in
AES Convention 139
AES Convention
139
Paper number
211
Publication date
October 6, 2015
Session subject
Transducers
Affiliation
NASA Ames Research Center, Moffet Field, CA, USA; San Jose State University Foundation, San Jose, CA, USA; Calit2 (California Institute for Telecommunications and Technology), UC San Diego, La Jolla, CA, USA (See document for exact affiliation information.)
Type
Engineering Brief