Experiments with a loudspeaker

Yaakov Kraftmakher

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A common moving-coil loudspeaker is useful for learning harmonic motion. A simple optical method is used to observe free and forced oscillations of the diaphragm of a loudspeaker. With a lock-in amplifier and data-acquisition system, the frequency response of the loudspeaker and its electrical impedance are automatically recorded versus frequency. From the measurements, it is easy to calculate electrical and mechanical parameters of the loudspeaker.

Original languageEnglish
Pages (from-to)567-579
Number of pages13
JournalEuropean Journal of Physics
Issue number3
StatePublished - 2009


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