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Vehicle noise and the passenger.

M E Bryan1, W Tempest, D Williams

  • 1Department of Electrical Engineering, University of Salford, UK.

Applied Ergonomics
|September 1, 1978
PubMed
Summary

Vehicle noise levels are unacceptably high for passengers. This study investigates subjective responses to in-vehicle noise, highlighting the need for new comfort criteria, especially concerning low frequencies.

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Area of Science:

  • Automotive Engineering
  • Acoustics
  • Human Factors

Background:

  • Limited research exists on the interior noise climate of passenger vehicles.
  • Current noise levels in cars and heavy goods vehicles exceed passenger comfort thresholds at typical speeds.

Purpose of the Study:

  • To investigate the subjective response to noise within motor vehicles.
  • To establish acceptable noise level criteria for passenger vehicles.
  • To understand the impact of low frequencies on in-vehicle comfort.

Main Methods:

  • Conducted research on subjective responses to vehicle noise both on-road and in laboratory settings.
  • Analyzed the influence of very low frequencies on passenger comfort.
  • Identified challenges in accurately replicating in-vehicle acoustic environments in laboratories.

Main Results:

  • Vehicle interior noise levels are often unacceptable for passengers during normal driving.
  • Very low frequencies significantly impact perceived comfort levels inside vehicles.
  • Reproducing realistic in-vehicle noise conditions in a lab setting presents considerable difficulties.

Conclusions:

  • There is a lack of established criteria for acceptable noise levels in passenger vehicles.
  • A tentative criterion for acceptable noise levels has been proposed.
  • Further research is needed to develop a more precise measure of subjective noise rating in vehicles.

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