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New Acoustic Test Facilities of BMW
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 15, 1985 by SAE International in United States
Annotation ability available
BMW has introduced new test stands for noise measurements on passenger cars and motorcycles.
Information is given on room conditions, machinery equipment, sound levels, frequency ranges and types of measurement.
The semi-anechoic room is designed for measuring the sound distribution emitted by a single vehicle. Road influence is simulated by a reflecting floor and a roller-dynamometer.
The free field sound distribution in terms of distance and direction is measured in the anechoic room. This room has high-precision installations for sound source identification and noise mapping.
The reverberation room serves to measure sound power emitted by the test object. Its second purpose is to subject the bodywork to a high-power external sound source and to measure the sound-deadening effect of the passenger compartment.
In conclusion, the presentation provides reports on the initial experience with these test facilities.
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CitationEilker, R., Herzum, N., Keiner, W., and Ulrich, A., "New Acoustic Test Facilities of BMW," SAE Technical Paper 850992, 1985, https://doi.org/10.4271/850992.
- SAE Technical Paper Series 820372