Question
In a hi-fi speaker system, why is the woofer (low. frequency speaker) larger than the tweeter (highfrequency speaker)?
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A speaker works by converting electrical signals into sound waves. These sound waves are produced by the movement of the speaker driver, which is a diaphragm that vibrates to create sound. Show more…
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In a home stereo system, low sound frequencies are handled by large "woofer" speakers, and high frequencies by smaller "tweeter" speakers. For the best sound reproduction, low-frequency currents from the amplifier should not reach the tweeter. One way to do this is to place a capacitor in series with the $8.0 \Omega$ resistance of the tweeter; one then has an $R L C$ circuit with no inductor $L$ (that is, an $R L C$ circuit with $L=0$ ). What value of $C$ should be chosen so that the current through the tweeter at $200 \mathrm{Hz}$ is half its value at very high frequencies?
Why is the intensity of an echo less than that of the original sound?
Why is the speed of an electrical signal so much greater than the speed of sound?
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