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On Generating Mechanisms for External Tire Noise
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Sector:
Event:
Highway Tire Noise Symposium
Language:
English
Abstract
An analysis of available tire noise data seems to indicate that external noise emission from tires on dry roads is mainly caused by radiation of vibrations from the tire-road interactions. Indications of this are:
- 1.Speed dependence of random-tonal-and squeal noise.
- 2.The power spectral density versus speed and frequency (by using a novel data-reducing technique for tire-noise).
- 3.The connection between n and C in the formula
Where:- L
- is sound level dB(A),
- C
- is regression constant,
- V
- is vehicle speed, and
- n
- is velocity exponent.
All tires and road surfaces constitute a straight line. - 4.External noise dependence on the macro-texture of the road.
- 5.Connection between the normalized PSD versus structure number and PSD versus space frequency of the roughness of the road surface.
The paper points out the possibility of tangential movements of tread elements as a source of high-frequency external noise from tires on dry road surfaces.
For wet roads, the tire noise normalized spectrum in the lower frequency region would suggest some turbulent fluid-dependent mechanism while transients from braking up the water film may be responsible for the noise at higher frequencies.
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Authors
Citation
Nilsson, N., "On Generating Mechanisms for External Tire Noise," SAE Technical Paper 762026, 1976, https://doi.org/10.4271/762026.Also In
References
- Siddon Thomas E. “Noise Generation Mechanisms For Passenger Car Tires.” 84th meeting of Acoustical Society of America 1972
- Reiter, W. F. Jr. Eberhardt Allen C. Harper Leon J. Atkinson T. L. “Truck Noise VII - An Experimental Investigation of Truck Tire Sound and Vibration.” Dept. of Transportation Report No. DOT TST-75-60 Dec. 1974
- Underwood M. C. P. “A Preliminary Investigation into Lorry Tire Noise.” TRRL Report LR 601 1973
- Hillquist Ralph K. Carpenter Philip C. “A Basic Study of Automobile Tire Noise.” General Motors, Engineering Publication 85th meeting of Acoustical Society of America 1973
- Trivisonno B. N. Beatty J. R. Miller R. F. “The Origin of Tire Squeal.” 5 1967
- Johansen J. M. “Tire Noise - A Part of Road Traffic Noise.” April 1975
- Lewis P. T. “The Noise Generated by Single Vehicles in Freely Flowing Traffic.” Journal of Sound and Vibration 30 2 1973 191 206
- Mills C. H. G. “Noise Emitted by Coasting Vehicles.” MIRA Bulletin May June 1970
- Ullrich S. 1974
- Fuller W. R. Potts R. L. “A Study of Automobile and Light Truck Tire/Pavement Interaction Noise Levels.” August 1975
- Nilsson N. Å. “Sound-Generation in Duct Segments for Ventilating Systems.” 1973 9 16
- Nilsson N. Å. “Generating Mechanisms of External Tire Noise.” Internal Technical Report TR 3. 709. 14 August 1976
- Rathe E. S. 17 1966
- Sandberg U. “Characterisation of Road Surfaces With Respect to Tire Noise.” National Swedish Road and Traffic Research Institute Report No. 92 1976
- Nilsson N. Å. Sōderqvist S. “Radiation of Airborne Sound From Tires Due to Contact Patch Excited Vibrations.” Internal Technical Memorandum September 1975