Pager with escalating audio alert signal level

Details Pager with escalating audio alert signal level Pager with escalating audio alert signal level

1979-04-30

1980-12-02

Yusko, Donald J.

Communications: electrical

Systems

Nonselective paging

325 64, 340384E, G08B 2700, H04M 1102, H04Q 908

Patent

active

042374480

ABSTRACT:
An alerting device, such as a radio pager, which produces an audible alerting signal includes a signal level control which causes the alerting signal to be initially produced at a low audio level, with the signal increasing or escalating to a higher audio level. The signal level can increase continuously in a smooth rise, or can increase in steps. The level control can include an attenuator which initially reduces the signal level, to which a control signal is applied to reduce the attenuation and increase the alerting signal. The attenuator can be coupled to an audio amplifier so that the overall gain of the signal applied to the transducer producing the audible signal is increased from an initial low signal level as the signal continues.

REFERENCES:
patent: 4087793 (1978-05-01), Lucas
patent: 4145684 (1979-03-01), Stodolski

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