Oscillations and Waves > Instruments > Plates, Bars, and Solids | DCS# 3D40.55 |
HP function generator | 202-08-G |
Philips amplifier | 202-09-B |
speaker/horn driver | 202-12-B |
plexiglas enclosure | 202-12-B |
foam
rubber
pad |
202-12-B |
beaker or goblet | 202-12-B |
microphone |
202-07-E1 |
scope
and camera or laptop |
202 |
strobe light | 101-19-E |
video camera | 202-09-D |
ear
plugs |
Set strobe to just above or below a submultiple of the resonance frequency.
Display both driving frequency and microphone signal. Trigger on function generator.
Protect speaker with 2 A fuse.
Input to amplifier should not exceed 1 V.
Set the beaker within 1/2 cm of the speaker. Set microphone 90 degrees from speaker. Illuminate beaker from above with strobe light and position camera to display rim.