Audition Instruments

AUDITION INSTRUMENTS
	Name: Helmholtz Resonators Manufacturer: Unknown Description: Hollow metal spherical chambers that are funnel shaped at one end and open at the other (Titchener, 1901) Use: Produces sound (Rowe, Barnes, & LaFleur, 1995).

	Name: Seashore's Audiometer with headphones Manufacturer: Unknown Description: Includes induction coils, battery, galvanometer, resistance coil all built into a compact wooden case. Comes with a telephone receiver that resembles headphones. Use: Measures auditory acuity (Rowe, Barnes, & LaFleur, 1995).

	Name: Sonometer Manufacturer: Stoelting Co. Description: Long wooden resonator with strings for tuning. Use: Produces sound for pitch discrimination.

	Name: Sound Localization Chair Manufacturer: Unknown Description: Consists of a tripod stool which supports a casting with an adjustable seat, vertically fixed arm and a rotating arm. Fixed arm carries a graduated semicircle which is an adjustable head grip. Rotating arm carries a circular speaker which rests above the semicircle. Use: Demonstrates and maps binaural functions.

	Name: Sound Pendulum Manufacturer: Arthur H. Thomas Co. Description: Consists of an adjustable metal arc scale on which two pendulums are held in place by a metal catch Use: Used to study judgment of sounds.

	Name: Stern Variator Manufacturer: Max Kohl, A.G. Description: Consists of an adjustable resonator which contains a piston which is attached to a graduated cam. Air is blown through a rubber balloon pump attached to the top of the instrument. Use: Produces sound.

	Name: Titchener's Metronome Box Manufacturer: Stoelting Co. Description: Black box whose inside is lined with 1/2 inch of felt material and whose cover is operated by an adjustable hand lever attached to the back. Use: Used to control the audibility of beats produced by other metronomes by making them noiseless.

	Name: Tuning Forks with Resonance Boxes Manufacturer: Unknown Description: Tuning forks mounted onto wooden box. Use: Produce sound.

	Name: Variable Pitch Whistle Manufacturer: Unknown Description: Long adjustable wooden whistle. Use: Produces sound for pitch discrimination

	Name: Young's Pseudophone Manufacturer: Stoelting Co. Description: Resembles headphones but with cone-shaped receivers. Use: Used to study sound localization.