NOISE INSIDE MOTOR CARS

Although the noise levels to which the occupants of motor cars are subjected are generally not high enough, and exposure times not long enough, to have a detrimental effect on the hearing, ones own driving experience confirms that speech interference, fatigue and annoyance certainly occur as a result of the noise. Now that the comfort of the occupants is one of the prerequisites of a good vehicle the control of noise at the design stage is essential if costly modifications and adverse publicity are to be avoided. The results presented in this paper are based on the initial work carried out at the Institute of Sound and Vibration Research During the period 1965/68 on the problems of noise inside motor vehicles. The noise inside some two dozen cars was analysed and from the results the more detailed research programme which is being carried out at the I S V R was planned. The work is primarily concerned with the low frequency noise and in particular the problem of 'boom'. 'Boom' can be defined as a low frequency noise of high intensity, excited by one of engine's unbalanced harmonics, where most of the energy is concentrated at usually one discrete frequency.

  • Supplemental Notes:
    • Presented at the Third Symposium of the Society of Environmental Engineers, Imperial College of Science and Technology, April 15-18, 1969.
  • Corporate Authors:

    Society of Environmental Engineers

    Imperial College of Science and Technology
    ,   England 
  • Authors:
    • Goodwin, D W
    • Priede, T
  • Publication Date: 1969-4-15

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Filing Info

  • Accession Number: 00261301
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM