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Infrasound Pressure Levels In Commercial Vehicles
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Event:
SAE Brasil
Language:
English
Abstract
This paper presents the results concerning infrasound pressure levels investigated experimentally in commercial vehicles under differentiated conditions. The investigations come from measurements effected in heavy vehicles operating in specific conditions, as listed below:
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- function of velocity;
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- windows and solar roof closed;
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- solar roof opened;
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- windows and solar roof partially opened.
Under the action of wind attack, the passenger compartment behaves sometimes like a cavity called Helmholtz resonator. The windows and solar roof apertures, and also the volume, are important parameters in this research. The infrasound levels as well the spectrum profiles are analyzed under different conditions, and they are also compared with those obtained with passenger cars. The time exposition is associated to the levels, and some aspects concerning comfort and injury are discussed.
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Citation
Hélcio, O. and Mizutani, V., "Infrasound Pressure Levels In Commercial Vehicles," SAE Technical Paper 931610, 1993, https://doi.org/10.4271/931610.Also In
References
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- Onusic H. et al Experimental Investigation of Infrasound in Vehicles (oral exposition) 3rd Int’l Seminar on Noise Control Rio de Janeiro 1989
- Mizutani V.S. Onusic H. Experimental Investigation of Infrasound in Commercial Vehicles (preliminary) 4th Int’l Seminar on Noise Control Rio de Janeiro 1992 133 136
- Yeowart N.S. Thresholds of Hearing and Loudness for Very Law Frequencies Infrasound and Low Frequency Vibration Tempest W. Academic Press 1976
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