- #1
IRL303
- 1
- 0
Hi gang.
I wanted to see what would happen if I placed a cassette tape in-front of a speaker then a microphone behind the cassette which was hooked up to a oscilloscope. The mic was set to record when it detected sound. So I turned the mic on and ran a frequency from 30Hz to 200Hz right around 80Hz the mic activated and the oscilloscope starts to move. Around 100Hz its really moving. After it was done I looked at what it had recored in a program called wavepad and sure enough there was a waveform. In some places of the waveform there was a very crude looking sine wave that was distorted but, in other places it was very level and the up and down parts of the wave matched perfect.
So I was wondering if someone might be able to tell me what I recorded. I thought maybe it was just the test tone from the speaker the mic was picking up but the oscillator would of picked it up straight away as soon as I pressed play as would of the mic. I would be very greatful if someone could tell me what is going on... If anything?
Thanks guys.
I wanted to see what would happen if I placed a cassette tape in-front of a speaker then a microphone behind the cassette which was hooked up to a oscilloscope. The mic was set to record when it detected sound. So I turned the mic on and ran a frequency from 30Hz to 200Hz right around 80Hz the mic activated and the oscilloscope starts to move. Around 100Hz its really moving. After it was done I looked at what it had recored in a program called wavepad and sure enough there was a waveform. In some places of the waveform there was a very crude looking sine wave that was distorted but, in other places it was very level and the up and down parts of the wave matched perfect.
So I was wondering if someone might be able to tell me what I recorded. I thought maybe it was just the test tone from the speaker the mic was picking up but the oscillator would of picked it up straight away as soon as I pressed play as would of the mic. I would be very greatful if someone could tell me what is going on... If anything?
Thanks guys.