Oscillations and Waves > Instruments > Air Columns DCS# ?

EDGE TONE DEMONSTRATOR

edge tone demonstrator

APPARATUS
wooden box with slit, wedge 202-06-C
air hose and connector 202
wireless microphone 201A

DESCRIPTION
Air jet from old organ pipe flue and wooden wedge can produce a variety of edge tones, which may be amplified with a microphone.  Two main variables are velocity of air in jet, and distance from jet aperture to wedge.  A low-pressure air regulator should be used to control the air from the building air line.

REFERENCE

See Coltman, J. Acoust. Soc. Am. 60, 725 (1976).