Sound level indicating devices

Details Sound level indicating devices Sound level indicating devices

1983-06-08

1985-04-02

George, Keith E.

Electrical audio signal processing systems and devices

Monitoring of sound

73646, G08B 536, G08B 2300, G01H 312

Patent

active

045091897

ABSTRACT:
A sound level indicating device specifically designed for use by educators to use in teaching students the art of self-discipline when students are arranged in large groups in a large area with means for: (1) detecting noise; (2) distinguishing between noises of different decibel levels; (3) distinguishing between noises of different lengths of time; (4) ignoring isolated sounds of excessive decibel level which may occur in the midst of a general noise level; (5) switching a plurality of SPDT relays; (6) giving visual signals to indicate the rise and/or fall of noise levels in reference to a predetermined decibel level.

REFERENCES:
patent: 3304368 (1967-02-01), Ford et al.
patent: 3440349 (1969-04-01), Gibbs
patent: 3615162 (1971-10-01), Barber
patent: 4346374 (1982-08-01), Groff
"SOUNDEK: A Sound Monitoring Device", 2 pages of sales literature; Environmental Design Planners, Inc., Tampa, Fla.
"Lunchroom Traffic Lights", The Tampa Tribune, Section B, p. 1B, Dec. 27, 1980.

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