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Which frequency range does tyre road noise dominate?

  • A.Above twenty kilohertz
  • B.Around ten hertz, which corresponds to the frequency at which the wheel rotates at normal road speeds
  • C.A few hundred to a few thousand hertz
  • D.Below fifty hertz, where the resonance of the tyre cavity produces the greatest sound pressure within the cabin

Answer: C

Tread pattern impact and air pumping generate noise principally between about 500 and 2000 hertz, which is where the ear is most sensitive. The tyre cavity resonance near 200 hertz is a separate and troublesome tonal component. Wheel rotation frequency is far too low to be heard as sound and appears instead as vibration.

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