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An active headrest for personal audio.

Stephen J Elliott1, Matthew Jones

  • 1Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton, SO17 IBJ, United Kingdom.

The Journal of the Acoustical Society of America
|May 20, 2006
PubMed
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Personal audio systems can achieve acoustic isolation using headrest loudspeakers. This method significantly reduces sound leakage to adjacent seats, enhancing listener privacy and comfort in shared spaces.

Area of Science:

  • Acoustics
  • Audio Engineering
  • Signal Processing

Background:

  • Growing demand for personal audio systems ensuring listener privacy.
  • Limitations of current personal audio solutions like headsets.
  • Need for acoustic isolation in shared environments such as vehicles.

Purpose of the Study:

  • Investigate methods for achieving acoustic isolation using headrest loudspeakers.
  • Develop a system for personal audio that minimizes sound spillage to adjacent listeners.
  • Evaluate the effectiveness of active control for acoustic isolation in seat headrests.

Main Methods:

  • Exploration of multiple approaches to active acoustic control.
  • Implementation of a dual-loudspeaker system within a headrest.

Related Experiment Videos

  • Validation through analytical models and practical testing in controlled environments (anechoic chamber, small room).

    • Main Results:

    • A dual-loudspeaker configuration proved most effective.
    • Significant crosstalk attenuation between adjacent seats, ranging from 5 to 25 dB.
    • Effective performance demonstrated for frequencies up to approximately 2 kHz.

    Conclusions:

    • Active control of headrest loudspeakers can provide substantial acoustic isolation.
    • The developed system offers a viable solution for personal audio in shared seating.
    • This technology enhances user experience by reducing unwanted sound leakage.