School cafeteria sound level monitor

Details School cafeteria sound level monitor School cafeteria sound level monitor

1983-06-08

1985-07-16

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

181 05, 307 56, 340540, 340566, 307117, G08B 2100

Patent

active

045299730

ABSTRACT:
Three distinct visual indications, one audible indication, and preferably one timing output voltage are provided which are individually activated depending upon when the sound levels falls within a predetermined level. This monitor aids both students and supervisors in establishing consistent and fair noise standards. Variable controls are provided to allow the supervisor to determine the sound level at which the visual indications and audible indication and timing output voltage will automatically be activated. A filter network is included that attenuates non-voice frequencies as well as short, non-repetitive sounds.

REFERENCES:
patent: 3304368 (1967-02-01), Ford et al.
patent: 3875337 (1975-04-01), Bradley
patent: 4346374 (1982-08-01), Gropf
patent: 4424511 (1984-01-01), Alberts, Jr.

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