Oscillations and Waves > Instruments > Tuning Forks DCS# 3B46.45

TUNING FORK RADIATION PATTERN



APPARATUS
large tuning fork
202-05-B
handle and associated hardware to rotate tuning fork
202-05-E2
microphone
202-07-E1
amplifier
202-09-B
oscilloscope
202-cart


DESCRIPTION
Intensity should have 180° periodicity.  Let polar axis go through tines of fork.   When pressure change is max at 0° and 180°, it is a minimum at 90°.  Thus there are intensity maxima at these three angles, and zero intensity somewhere between (possibly where P2=0).

Microphone can be held firmly in place in hand, with arm firm against body.
-REW

NOTES



REFERENCE

Sutton, S-109