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Comparisons Between Simulated and in-situ Measured Speech Intelligibility Based on (Binaural) Room Impulse Responses

Zhu, P; Mo, F; Kang, J; Zhu, G; (2015) Comparisons Between Simulated and in-situ Measured Speech Intelligibility Based on (Binaural) Room Impulse Responses. Applied Acoustics , 97 pp. 65-77. 10.1016/j.apacoust.2015.04.005. Green open access

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Abstract

This study systematically compares acoustic simulation and in-situ measurement in terms of speech transmission index (STI), speech intelligibility scores and relationship curves when considering (binaural) room impulse response and four general room conditions, namely, an office, a laboratory, a multimedia lecture hall and a semi-anechoic chamber. The results reveal that STI can be predicted accurately by acoustic simulation (using room acoustics software ODEON) when there is a good agreement between the virtual models and the real rooms and that different reverberation time (RT) and signal-to-noise ratio (SNR) may exert less significant influence on the simulated STI. However, subjective intelligibility may be overestimated when using acoustic simulation due to the head-related transfer function (HRTF) filter used, and the score bias may be minimal and difficult to detect in everyday situations. There is no obvious score tendency caused by different RT, though with the decrease in the SNR, score bias may increase. Overall, considering that the accurate acoustic modelling of rooms is often problematic, it is difficult to obtain accurate speech intelligibility prediction results using a simulation technique, especially when the room has not yet been built.

Type: Article
Title: Comparisons Between Simulated and in-situ Measured Speech Intelligibility Based on (Binaural) Room Impulse Responses
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.apacoust.2015.04.005
Publisher version: https://doi.org/10.1016/j.apacoust.2015.04.005
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Speech intelligibility, Simulation, In-situ measurement, (Binaural) room impulse responses
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/10058511
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