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Posted: Mar 6th, 2008 02:21 PM |
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Jeff
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Interesting thought Mark. Here is one way to approach that. To capture vibrations of non-ferrous material, a transducer is necessary: Place the hair in a tuning fork arrangement, such that the hair is pulled taught (just short of breakage) across the top of the tines. I would recommend a fine-threaded vernier for this. Then there would be two ways to pickup the vibrations: 1. Simply place a highly sensitive condensor microphone against the fork, and amplify the mic's outputs. Or, 2. Glue magnets on the sides of the fork, and wind a coil of fine transformer wire around the magnets to pickup vibrations. Set the impedance of the coil to match the microphone input of an audio mixer (Hi-Z, > 10k ohms, or Low-Z, <200 ohms). Build a low-loss cable that will carry the voltages produced to the mixer. Voila! Jeff
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