BrainStuffA public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.
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BrainStuff
Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and expl…Social links
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