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Research in Regard to Sensory Characteristics Measuring for the Impulse Noise of the Engine Valve System
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English
Abstract
This research proposes an automatic measuring method for the impulse noise of the valve system in engine production line. This research is composed of the following two parts. (1) The most suitable method for indicating the impulse noise of the valve system - the representative characteristic values - is selected from the general measuring methods for impulse noise. As the result, the crest factor in the frequency band above 1kHz became optimal. (2) By detailed sensory characteristic analysis it was found that impulse noise can be heard better with increasing frequency and that there is little influence in the frequency band with the same frequency as the background noise. Thus the crest factor was obtained for each frequency, and the sensory test for the impulse noise of the valve system is deduced by this linear coupling. As the result of multiple reguression analysis, a high accuracy prediction equetion with a multiple correlation coefficient of 0.91 has been obtained.
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Citation
Nemura, T., Adachi, N., and Suzuki, K., "Research in Regard to Sensory Characteristics Measuring for the Impulse Noise of the Engine Valve System," SAE Technical Paper 910620, 1991, https://doi.org/10.4271/910620.Also In
References
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- Usami Isamu et at. Development of a tappet impact noise investigation unit Toyota Enginearing 27 4 1978
- Maeda Osamu Quantitative evaluation of abnormal engine noise Internal Combustion Engines 27 343 1988