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