Culture & entertainment
Acoustic feedback loops occur when microphones hear speakers
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That earsplitting shriek that ruins live setups is just pure, unadulterated acoustic panic. A microphone picks up a sound, the speaker makes it louder, the microphone immediately picks up that louder sound, and the speaker makes it even louder. Within milliseconds, the system gets trapped in an infinite loop of its own amplification until someone unplugs a cable.
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