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Experimental investigation of the effect of static load on rolling tire noise

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Tire noise radiation is a prominent noise pollution source and it is affected by many different parameters. Here, the effect of static load on tire noise radiation was investigated in a laboratory environment. The measurements were conducted by using the Tire Pavement Testing Apparatus (TPTA), on which a loaded tire can be run at speeds up to 50 km/hr; the tire noise was measured using a nearfield microphone method. The tire loading was varied from 500 to 1300 pounds, several different concrete pavements were used, and both narrow band and 1/3-octave band spectra were recorded. It was found generally that increased loading caused an increase in radiated noise below 1 kHz, but at the same time a decrease in levels in the 1 kHz to 1.7 kHz range. To identify whether the latter effect was the result of an acoustical resonance, both normal tires and fibrous-material-filled tire were tested and compared: the fibrous material had essentially no effect, so it was concluded that the high frequency load-reversal effect related to structural wave propagation in the tire. Static tire mobility measurements were also performed to identify the wave-types that could be responsible for this effect.
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Keywords: 11.7.1; 21.7

Document Type: Research Article

Affiliations: Ray W. Herrick Laboratories, Purdue University

Publication date: May 1, 2018

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