Frequency of the Humming sound produced during oscillation of a wire?

Question

When a copper wire carrying an ac of freqency f oscillates under the influence of an applied magnetic field, would the buzzing sound you might hear also have frequency f?

Answer 1

It depends on the frequency of the A/C current and the frequency of the applied magnetic field, since the interaction of the magnetic field produced by the A/C current pulling on your externally applied magnetic field is what causes the vibration.

If you have a static external magnetic field (0 hz) and a line frequency of 60 hz, the line will vibrate at 60 hz.

If I remember correctly, if the frequencies of the two different magnetic fields are the same (say 60 hz) then the wire will vibrate at double that frequency (120 hz) if the two fields are 90 degrees out of phase with respect to each other . Otherwise, the net frequency that the wire would vibrate at would probably be the difference between the two (unless you have some weird shaped waveform for the external field, or you are playing around with the phase angle).

What you are describing is an A/C motor. You can find the equations on the web.

Correction: Some kind soul pointed out to me in a message that the currents would have to be 90 degrees out of phase to double the frequency. If they were 180 or in phase you would just increase or decrease the amplitude (the humming would get louder or softer). I adjusted my response (above) accordingly. It's been over ten years since I was last in college. ^_^

Thanks goose1077

Answer 2

Yea, in the US it would be the Freq of the AC line which is 60 Hz

Answer 3

that's the fashion of astral plane you're going into at your modern-day state of meditation. airy plane produces the buzzing sound and at a higher sub element of this plane you listen a bee or mosquito noise.

Answer 4

I think so. Cause isn't that sound called humbucking? Hope this helps. I'm new at electronics.

Answer 5

if I remember my highschool physics right, it's 60 cycle.