Oscillations and Waves > Instruments > Strings DCS# 3B22.14
NORMAL MODES OF STRETCHED STRING
monochord
APPARATUS
monochord 202-07-G
HP 200AB function generator 202-09-G
500 Ω - 2-3 Ω audio transformer 214-01-D
magnet 202-20-C
sound level meter 202-07-E1
amplifier 202-09-B
oscilloscope with video camera 202
DESCRIPTION
When frequency of AC current through monochord wire matches normal mode frequency, amplitude of vibration is large and sound becomes audible.