Interference of two speakers

Experiment no.: 5.8.3
Interferenz zweier Lautsprecher
Two speakers are fed from the same sound source. The interference maxima and minima are detected by moving a microphone.
Comment: The video shows an out-dated set-up.

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Experiment, microphone at an antinode
Experiment, microphone at a node

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Interference of two in-phase waves
Interference of two anti-phase waves