Active-noise-control-based speech enhancement by using head-enclosing loudspeakers with an in-car audio system

Masanori Morise, Takayuki Iriki, Takanobu Nishiura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In-car systems such as car-navigation systems and car-audio systems are requisite to provide the driver and passengers with a comfortable driving experience. The driver generally needs to hear announcements reproduced by the car-navigation system, whereas the passengers only want to hear the music reproduced by car audio system. Since these signals interfere, the separation of these signals is crucial to achieve a comfortable drive for both the driver and passengers. To separate the sound signals for the driver (car-navigation announcements) and those for the passengers (music) at the driver's seat, we propose a method based on active noise control (ANC) with head-enclosing loudspeakers. The head-enclosing loudspeakers are mounted around the driver's seat so that they suppress the music from the car audio system. They emit the announcement and a signal to suppress the music as noise. The signal emitted by the head-enclosing loudspeakers does not mask the music at the seat positions of passengers because the energy of the emitted sound is lower than that of the music. Since the music which should be suppressed is the known signal, the proposed method may efficiently suppress it. The proposed method does not require the adaptive filters generally used for ANC. Subjective and objective experiments on speech-recognition accuracy were carried out to verify the effectiveness of the proposed method. The evaluation results show that the music for passengers is suppressed and announcements are enhanced at the driver's seat.

Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages2458-2463
Number of pages6
Publication statusPublished - 1 Dec 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: 4 Sep 20117 Sep 2011

Publication series

Name40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Volume3

Conference

Conference40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
CountryJapan
CityOsaka
Period4/09/117/09/11

Keywords

  • Active noise control
  • In-car audio system
  • Speech enhancement

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  • Cite this

    Morise, M., Iriki, T., & Nishiura, T. (2011). Active-noise-control-based speech enhancement by using head-enclosing loudspeakers with an in-car audio system. In 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 (pp. 2458-2463). (40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011; Vol. 3).