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Post by aquin43 on Feb 11, 2019 8:38:43 GMT -5
I came across this paper from the The Journal of the Acoustical Society of America.
Natural-frequency splitting of a guitar string caused by a non-uniform magnetic field:
Abstract: A magnet can affect the vibration of the metal strings in a musical instrument. Here it is shown that a magnetic field can cause splitting of a metal guitar string’s normally degenerate transverse vibration modes, leading to a beat note in the resulting sound. A distributed-spring model accurately predicts the natural frequencies of a vibrating guitar string in the non-uniform magnetic field.
Arthur
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Post by antigua on Feb 11, 2019 14:12:59 GMT -5
I'm really happy to see more research done on this subject. I've only read it over once very quickly, but I'll have to read it a couple times to soak up details. In their words, they say that in a commercial application with a typical pickup, the beating would occur with a frequency of about 1Hz, which at least an acknowledgement that there is audible effects caused by magnetic pull in typical situations. This agrees with the kitchen table experiments that I've posted here before.
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Post by ms on Feb 12, 2019 10:54:26 GMT -5
That is very much like I have understood it. He refers to the L&L paper as useful in learning how guitar pickups work. Oh well. There might also be a bit more to the process since the splitting into two frequencies in the two planes of vibration can affect how energy couples between these two modes.
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