Life safety audio system having a voice synthesizer and a consta

Details Life safety audio system having a voice synthesizer and a consta Life safety audio system having a voice synthesizer and a consta

1985-05-16

1987-07-21

Rubinson, Gene Z.

Telephonic communications

Emergency or alarm communications

379 49, 379414, 379170, 340692, H04M 1104

Patent

active

046823484

ABSTRACT:
A life safety system for monitoring a building has a plurality of detectors for detecting alarm conditions located throughout the building, a plurality of speakers located throughout the building, a source of pre-stored voice messages which can be broadcast over the speakers, and a telephone network. The improvement is a voice synthesizer for providing the source of pre-stored voice messages and a constant volume telephone system. The constant volume telephone system has a telephone line and a plurality of telephones which can be connected to the telephone line, and a power supply having an adjustable output voltage which provides the voltage for the telephone line. A sensing and adjusting circuit senses the number of telephones off-hook and causes the power supply to be adjusted in response to the number of telephones off-hook.

REFERENCES:
patent: 2912503 (1959-11-01), Grandstaff et al.
patent: 4278843 (1981-07-01), Hestad
patent: 4558181 (1985-12-01), Blanchard et al.
Keefe and McDowell, "Enhancement of a Radiation Safety System Through the Use of a Microprocessor Controlled Speech Synthesizer", IEE Transactions on Nuclear Science, vol. NS-28, No. 1, Feb. 1981, pp. 643-645.

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