1972-02-01

Characteristics of Truck Tire Sound 720926

The nature of the sound produced by running truck tires is primarily due to the tread pattern design. At 50 mph the sound consists of a fundamental in the frequency range 300-400 Hz and of several higher harmonics. Each of these harmonics, including the fundamental, may consist of several separate frequencies; however, the spread of these frequencies is less than one-third octave. The singing, persistent sound produced by certain tire designs is shown to be associated with the level of the higher harmonics, particularly the third and fourth.

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