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hi ppl, i am doing this science project and i am measuring the frequency of a speaker and i am using the oscilloscope, and i have to measure the frequency now, first the sound is generated from a device and then captured by the oscilloscope. can someone please explain to me on how to measure it, i don't know thats why i am asking, thanks in advance. bye.
P>S> the frequency comes nice like curves and it can be slowed down. thanks

2006-12-14 07:14:56 · 4 answers · asked by Anonymous in Science & Mathematics Physics

4 answers

A speaker doesn't have a frequency, but it sounds like you are measuring the frequency of a sound produced by the speaker. The microphone converts the sound pressure to an electrical signal, and the oscilloscope gives you a graph of that signal versus time. On the time scale, measure the time between a pair of adjacent identical points on the waveform (like peaks or zero-crossings). That gives you seconds per cycle of the repeating waveform. The 'Hertz' unit of frequency is just another name for the old, intuitive term cycles per second. You can figure out how to convert.

2006-12-15 12:21:04 · answer #1 · answered by Frank N 7 · 0 0

If you are seeing a sine wave and are able to "slow it down" or "stop" it, then you should be able to see the grid on the screen you are looking at. The graduations going up and down determine amplitude and the ones going from left to right are measures of time. Frequency is determined by the completion of one sine wave across a measured time.

2006-12-14 07:54:25 · answer #2 · answered by Lionel . 2 · 0 0

If you are inputing a nice sine type signal, it is that button where you slow it down that you read the frequency... when you get the curve to stop and stand still, the dial type button should have some sort of scale probably Hz.. that's your frequency..

2006-12-14 07:18:18 · answer #3 · answered by Leonardo D 3 · 0 0

it is an instrument which measures the number of osscilations per minute

2006-12-14 07:20:23 · answer #4 · answered by Dr Knight M.D 5 · 0 1

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