PURPOSE: To demonstrate use of a sound level meter.

DESCRIPTION: The sound level meter is viewed by a TV camera and displayed on a monitor. Several loud sources are provided, including the Gas Pressure Model with ball bearings, the Twirl-a-Tune with Vacuum Cleaner, and a portable audiotape machine with earphones. It is easy to get over 100 dB in the earphones.


REFERENCES: (PIRA 3C30.22) See Demonstration Reference File for a copy of the manual for the meter, a copy of which is kept with the meter.

EQUIPMENT: Sound level meter with TV camera and monitor display, lamp, Gas Pressure Model, Twirl-a-Tune with Vacuum Cleaner, protable audiocassette player with earphones.

SETUP TIME: 10 min.

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