A number of musical instruments are available, primarily for
Physics 21 demonstration purposes, but also useful for other acoustical
demonstrations. These include
- A guitar. (You can put a pickup underneath to demonstrate
oscillations and how an electric guitar works, or put a magnet underneath
and run an oscillating current to demonstrate resonance).
- A cello. This is actually a fairly nice instrument.
- A clarinet. May need new reeds. Takes some experience to get a good
sound out of it.
- A trumpet.
- A plastic recorder.
- A kazoo (just for fun).
- A dual glockenspiel. One is given just intonation, the other
tempered intonation. The differences are clearly audible.
- Several diapason organ pipes--lead and wood. One has a sliding collar to
demonstrate the tuning mechanism. You can blow in to them to achieve quite a
- A "cut-away" reed organ pipe, which you can pass around to show how the
length of the vibrating part of the reed is tuned.
Most of these take a little practice before you can get any sound out
at all--plan ahead!