|MadSci Network: Engineering|
the kundt tube is well known for calculating speed of sound. I want with the same setup, but with tube of unknown (finite) length, to determine tube's length with speed known and the frequency a parameter. this means I need to detect the occurrence of standing wave. The measurement (by microphone) would happen at the point where the speaker is. If the mic is connected to oscilloscope, can you tell a standing wave from non-standing wave and hence determine length of tube ? I would guess the mic would record zero signal because all is cancelling out in a node of standing wave. is this correct ? reason I ask : I want to do this in water, and use a slowly varying "chirp" to determine distance of objects in the water from their echo up to 2 meters distant. this could be built into remote control submarine (see www.subcommittee.com and check who is the mad scientist here ;-) Regards, Ronald van Aalst
Re: how to detect occurrence of standing wave by microphone in kundt tube
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