Speaker as a Microphone
From UO Physics Demonstration Catalog
Return to Inductance
Description:
Show how a speaker can be used as a microphone by connecting it to the oscilloscope! As shown in the photo, connect the two wires from a speaker to the CH. 1 input on the oscilloscope using a BNC cable. By tapping the speaker with your finger, you can see waveforms similar to the one in the photo. You can also whistle, yell, or sing into the speaker to show the waveform that your voice makes. When doing this, you'll want to have the center of the speaker very close to your mouth in order to pick up the sounds. To adjust the oscilloscope, you may have to fiddle around with the "position" and "scale" knobs underneath the "Horizontal" and "Vertical" panels on the front. Just keep tapping the speaker and adjusting until you can see a clear and good-sized waveform on the display.
Location:
- Speakers: Dr. 43
- Oscilloscope: Black cabinet
- BNC cables: Wall I
- Banana cables: Wall J
- BNC to banana cable adapter: Dr. 66
