basic

Moving Source Stationary Observer Sound Frequency Calculator

f_obs = f_s · v/(v ∓ v_s) — Doppler shift for moving source.

Calculates the observed frequency heard by a stationary observer when a sound source is moving towards or away from them. Uses the Doppler effect formula for a moving source.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Approaching: f = f_s·v/(v−v_s); Receding: f = f_s·v/(v+v_s)

In depth

Calculates the observed frequency heard by a stationary observer when a sound source is moving towards or away from them. Uses the Doppler effect formula for a moving source.