Multi-functional alarming system

Details Multi-functional alarming system Multi-functional alarming system

1993-03-09

1994-03-01

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specified indicator structure

3403845, 340692, 381 56, G08B 2508, H04R 2900

Patent

active

052911837

ABSTRACT:
An alarm system employing a vocoder which enables the alarm system to emit not only a buzzing sound but also a human voice, the alarm system being composed of a microphone, a microphone amplifier, a vocoder, a memory, a preamplifier, a power amplifier and a speaker whereby the alarm system can emit the buzzing sound of a police car, whistle sound or human voice to enhance the burglarproof effect or serve as a fire alarm system for indicating the way to escape.

REFERENCES:
patent: 3475751 (1969-10-01), Sontag et al.
patent: 4060803 (1977-11-01), Ashworth, Jr.
patent: 4750036 (1988-06-01), Martinez
patent: 4851823 (1989-07-01), Mori
patent: 4912457 (1990-03-01), Ladd

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