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Binaural speech-to-noise loudness ratio at the speech reception threshold in vehicles

Accepted version
Peer-reviewed

Type

Article

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Authors

Samardzic, Nikolina 
Moore, Brian CJ 

Abstract

Traditional methods for predicting the intelligibility of speech in the presence of noise inside a vehicle, such as the Articulation Index (AI), the Speech Intelligibility Index (SII), and the Speech Transmission Index (STI), are not accurate, probably because they do not take binaural listening into account; the signals reaching the two ears can differ markedly depending on the positions of the talker and listener. We propose a new method for predicting the intelligibility of speech in a vehicle, based on the ratio of the binaural loudness of the speech to the binaural loudness of the noise, each calculated using the method specified in ISO 532-2 (2017). The method was found to give accurate predictions of the speech reception threshold (SRT) measured under a variety of conditions and for different positions of the talker and listener in a car. The typical error in the predicted SRT was 1.3 dB, which is markedly smaller than estimated using the SII and STI (2.0 dB and 2.1 dB, respectively).

Description

Keywords

40 Engineering, 51 Physical Sciences, 4014 Manufacturing Engineering, 4017 Mechanical Engineering, 5103 Classical Physics

Journal Title

Noise Control Engineering Journal

Conference Name

Journal ISSN

0736-2501
2168-8710

Volume Title

69

Publisher

Institute of Noise Control Engineering

Rights

All rights reserved