Which motion changes the pitch?.
Does moving the speaker do the same as moving your ear?
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Does moving the speaker do the same as moving your ear?
Does moving the speaker do the same as moving your ear?
Fit the speaker and receiver before measuring the tone.
A moving source changes the spacing of wavefronts emitted into the air. A moving receiver instead encounters the existing wavefronts at a different rate. Both can raise the received pitch when moving toward one another, but they appear in different places in the Doppler equation. Motion away lowers the pitch.
One-dimensional constant velocities in still air at 343 m/s, all speeds below sound speed. Display shows an observation of at most 12 s, stopping before the devices meet with frequency and time slowed by 440; the numerical pitch is physical. No shock waves, wind or relativistic effects.
Receive a 500 Hz tone from the moving 440 Hz source.
Compare source and receiver motion’s effects on received frequency.