Explain how a tube might be used as a filter to reduce the amplitude of sounds in various frequency ranges. (An example is a car muffler)
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The car mufflers are devices used for acoustics soundproofing from the exhaust of the cars. The length of the pipe is designed certainly to allow only certain frequency of the sound be in resonant with the natural frequency of the air column in the pipe. So that frequency is heard the rest is silenced. A tube of a given length producing standing waves will resonate at certain frequencies. When a mixture of frequencies are input to the tube, only those frequencies close to resonant frequencies will produce sound that persists, because...