Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

Acoustic Doppler Shift

Estimate observed frequency for motion directly along the source-observer line.

Audio workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaObserved frequency = f*(c+observer)/(c-source); Frequency shift = f*(c+observer)/(c-source)-f
Sources and model references

Worked example

Inputs

Source frequency
1000 Hz
Wave speed
340 m/s
Observer speed toward source
0 m/s
Source speed toward observer
34 m/s

Expected results

Observed frequency
1111.111111 Hz
Frequency shift
111.1111111 Hz

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Estimate observed frequency for motion directly along the source-observer line.
  2. Set source frequency, wave speed, observer speed toward source, source speed toward observer in the indicated units.
  3. Calculate and compare observed frequency, frequency shift.

Try this example

{
  "f": 1000,
  "c": 340,
  "observer": 0,
  "source": 34
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.