New method for measuring realistic speech levels in conversations

Friday 26 Mar 21

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Naim Mansour
PhD student
DTU Health Tech
+45 60 56 66 57

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Marton Marschall
Senior Officer
DTU Health Tech

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Tobias May
Associate Professor
DTU Health Tech
+45 45 25 39 59

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Torsten Dau
Head of Sections, Professor
DTU Health Tech
+45 45 25 39 77
Researchers at Hearing Systems, Health Tech DTU, and WIDEX have found a new method to measure conversational signal to noise ratios. These findings are featured in JASA, the Journal of the Acoustical Society of America, this month.

The analysis of real-world conversational signal-to-noise ratios (SNRs) may provide insight into people's communicative strategies and difficulties, and guide the development of hearing devices. This study introduces a method for accurate in-situ SNR estimation, where the speech signal of a target talker in natural conversation is captured by a cheek-mounted microphone, adjusted for free-field conditions, and convolved with a measured impulse response to estimate its power at the receiving talker. The method is applied to in-situ recordings of conversations in two real-world sound scenarios and shown to result in more accurate SNR estimates compared to a typical single-channel method.

Naim Mansour, Marton Marshall, Tobias May, Adam Westermann, Torsten Dau
Link to article

Acknowledgements:
The research was supported by the Centre for Applied Hearing Research (CAHR) Hearing Systems DTU and Widex A/S.

Caption: Measuring the response of a cheek-mounted microphone with a head-and-torso simulator. Photo: Naim Mansour

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