Sound Generator Controls

Note: This tool generates tones according to FMVSS 141 requirements for pedestrian alert sounds in electric and hybrid vehicles.
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FMVSS 141 Requirements

Key Requirements:

  • Four-Band: Must use 4 non-adjacent bands spanning ≥9 bands from 315-5000 Hz
  • Two-Band: One band below 1000 Hz, one ≥1000 Hz, non-adjacent, within 315-3150 Hz
  • Volume Change: Must increase ≥3 dB between speed intervals
  • Directivity: Sound must be detectable from front and sides