Passive Amplifier

Demo Number	273
Location	Shelf 48
Description	A tuning fork doesn’t make much sound because the two tines oscillate opposite each other; the sound waves from the two sides destructively interfere. The interference can be reduced by placing a recently struck tuning fork near the hole in the box lid.
Related Demos	183
Tips	Also note that in lower-pitched tuning forks, the fundamental frequency is amplified and can be clearly heard louder than the overtones. Please return tuning forks to demo 183 shelf 49 after use. The box is the demo, there is nothing included inside the box.

Colorado State University