Measurement and subjective evaluation of noise in motor vehicles.
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Measurement and subjective evaluation of noise in motor vehicles. by D. Williams

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Published by University of Salford in Salford .
Written in English

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Edition Notes

PhD thesis, Electrical Engineering.

ID Numbers
Open LibraryOL19960830M

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Description / Abstract: This SAE Recommended Practice establishes a rating scale for subjective evaluations of noise and discomfort in motor vehicles. Through test procedures utilizing specific vehicles on specific roads, the scale may be utilized to assess the relative contributions of tires to noise and discomfort. technique, for transforming the subjective test technique from an “approximate” diagnostic tool to an exact measurement. 2. Measurements Measurement of the background noise In each of the 9 cars under tests, preliminary measurements of the interior noise, at various speeds, were conducted. PDF | Rattle noise is one of the main concerns of automotive manufacturers regarding final product quality. With the engine noise reduction obtained in | Find, read and cite all the research. Introduction. Noise results directly from inferior vehicle design giving rise to large structural vibrations or poor cabin insulation. In order to eliminate noise, the source, transfer path and receiver have to be investigated by noise measurement and analysis, customer feelings about noise have to be studied, and the root causes of the noise need to be by: 1.

THE MEASUREMENT OF NOISE INSIDE CARS 71 The tests were performed on a section of the M6, south of the Knutsford service station. The section was approximately 30 miles long, included no severe gradients and had a uniform road surface. Any effects of adverse weather conditions were eliminated by making measurements only on fine by: 6.   During production of new vehicles, automotive manufacturers rely on Faurecia to test their seat frames and motor controls to achieve specific noise and vibration goals. Accordingly, Faurecia required the new hemi-anechoic test chamber to meet the ISO standard for transmissibility, including a target base-ambient sound level below 25 dBA. A Survey of Sound Quality in the United States Automotive Industry Gordon L. Ebbitt Lear Corporation Auto Club Drive Dearborn, MI Abstract The concept of sound quality (SQ) has been used in the U.S. automotive industry since the ’s. Early studies were part of an effort to understand why some vehicles sounded better (and. Long-term measurements, using fixed devices, in order to give an indication of how noise nuisances change over time; Medium-term measurements, in order to evaluate the improvement following a change to an infrastructure, an urban redevelopment, or following a change in legislation;.

J. Sound Vib. () 15 (1), INTERPRETATION OF NOISE MEASUREMENTSt D. C. LAVENDERS Motor Industry Research Association, Lindley, Nr. Nuneaton, Warwickshire, England (Received 12 March ) With modern techniques, the measurement of sound is extremely easy, but it is not so easy to measure noise in such a way as to agree with human response to by: 1. Figure 1. SAE recommended practice for subjective rating scale for evaluation of noise and ride comfort characteristics related to motor vehicle tires [28]. Park et al. [15] form a rating test that separates driver’s assessment of a dynamic property from the opinion of whether it is an improvement or not. Acoustics — Measurement of noise inside motor vehicles ISO/TC 43/SC 1: ISO Acoustics — Measurement of noise emitted by stationary road vehicles — Survey method ISO/TC 43/SC 1 Road vehicles - Injury risk curves for evaluation of occupant protection in side impact ISO/TC In processing the results of the subjective evaluation, these groups were partly treated separately and depending on the correlation between the groups, treated as one group. THE METHOD Through the years FEV has developed a standard procedure for the objectivation of the subjective ratings in vehicle Size: KB.