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Vehicle Systems and Driver Modelling

DSP, human-to-vehicle interfaces, driver behavior, and safety

Ed. by Abut, Huseyin / Hansen, John / Schmidt, Gerhard / Takeda, Kazuya / Ko, Hanseok

Series:Intelligent Vehicles and Transportation

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Publication Date:
September 2017
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14. Array-based speech enhancement for microphones on seat belts

Rajan, Vasudev Kandade / Rohde, Sebastian / Schmidt, Gerhard / Withopf, Jochen


Microphones placed on the seat belts of an automobile (in the following called beltmics for short) are an interesting alternative compared to other sensor positions. Because of the small distance to the speaker’s mouth, usually a good signal quality (e. g., measured in terms of high signal-to-noise ratio) can be achieved. However, the signalsmay also be disturbed because beltmics can easily be touched by, e. g., clothes and they might be in the airstream of automotive ventilation systems. In addition, applying array processing techniques is difficult because the geometry is flexible and may change over time. This chapter presents signal enhancement algorithms designed for beltmics including echo cancellation, estimation of instationary noise, and microphone combining techniques. Results based on a real-time implementation are shown finally that demonstrate the performance of this new microphone type.

Citation Information

Vasudev Kandade Rajan, Sebastian Rohde, Gerhard Schmidt, Jochen Withopf (2017). 14. Array-based speech enhancement for microphones on seat belts. In Huseyin Abut, John H.L. Hansen, Gerhard Schmidt, Kazuya Takeda, Hanseok Ko (Eds.), Vehicle Systems and Driver Modelling: DSP, human-to-vehicle interfaces, driver behavior, and safety (pp. 191–208). Berlin, Boston: De Gruyter. https://doi.org/10.1515/9781501504129-015

Book DOI: https://doi.org/10.1515/9781501504129

Online ISBN: 9781501504129

© 2017 Walter de Gruyter GmbH, Berlin/Munich/BostonGet Permission

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