Oscillations and Waves
> Sound Reproduction > Microphones |
DCS# 3E30.xx |
carbon microphone |
202-19-B6 |
1.5
V battery |
202-02-D1 |
audio
transformer |
214-01-D |
amplifier/speaker
or digital video recorder |
202-20-B2 |
NOTES
The quality of the sound is very sensitive to how tightly the rod is held.