Doppler Effect Recording

DCS Code: 3B40.60 Last Updated: March 27, 2026
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Purpose

The Bell Laboratory "Science of Sound" recording presents two Doppler scenarios back-to-back: moving observer with stationary source, and stationary observer with moving source. Students hear both cases and compare the frequency shifts, reinforcing that the two situations are not physically equivalent for sound waves.

Original turntable setup: small speaker, Eico amplifier, Recocut turntable, and the Bell Laboratory "Science of Sound" vinyl record on a lecture bench
Figure 1: Original vinyl playback setup (now obsolete). The recording is available on YouTube — search "Bell Laboratory Science of Sound."