- #1
Gamma
- 357
- 11
Hello,
I want to use and oscilloscope to demonstrate sound waves for our local school science day. I want to be able to allow kids to make different vocal sounds to see how the sound waves look like.
I removed the microphone part from a headphone and used it in a circuit to see audio signals on an oscilloscope. The circuit I used is http://www.doctronics.co.uk/scope.htm.
Please scroll down. I used the circuit with an amplifier and dual power supply. For power supply, I used two 9V batteries as suggested in the above website. I don't see anything interesting on the scope. I had a vibrating tuning fork next to the microphone. I expected a wave form on the oscilloscope, but nothing happened.
Is there anything else I can do? Should I purchase a microphone? If so what type is better? If anyone has done this before, and have a better circuit could you share it with me? Any hint or suggestion to get this work is much appreciated! The science day is fast approaching! thank you.
Gamma
I want to use and oscilloscope to demonstrate sound waves for our local school science day. I want to be able to allow kids to make different vocal sounds to see how the sound waves look like.
I removed the microphone part from a headphone and used it in a circuit to see audio signals on an oscilloscope. The circuit I used is http://www.doctronics.co.uk/scope.htm.
Please scroll down. I used the circuit with an amplifier and dual power supply. For power supply, I used two 9V batteries as suggested in the above website. I don't see anything interesting on the scope. I had a vibrating tuning fork next to the microphone. I expected a wave form on the oscilloscope, but nothing happened.
Is there anything else I can do? Should I purchase a microphone? If so what type is better? If anyone has done this before, and have a better circuit could you share it with me? Any hint or suggestion to get this work is much appreciated! The science day is fast approaching! thank you.
Gamma