Radio with message reception and ambient noise level controlled

Details Radio with message reception and ambient noise level controlled Radio with message reception and ambient noise level controlled

1989-03-28

1990-02-27

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

455297, 3403111, 340692, H04Q 702

Patent

active

049049925

ABSTRACT:
A radio (10) measures and stores (16, 18) the ambient sound (or noise) level of its environment. When a message is received, the current noise (or sound) level is compared to a threshold (56). If the ambient noise level is such that an audible tone may not be heard by the radio user, a silent alert is automatically activated (62) regardless of whether the silent enunciator has been previously selected (enabled) by the radio user. In another aspect of the present invention, if the ambient noise level is such that an audible tone may be inappropriate (i.e., library, courtroom, or certain hospital areas), the silent alert is also automatically activated regardless of whether the silent enunciator is enabled so as not to disturb others.

REFERENCES:
patent: 4342023 (1982-07-01), Tsunoda et al.
patent: 4352091 (1982-09-01), Yamasaki
patent: 4356519 (1982-10-01), Cogdell, Jr.
patent: 4380824 (1983-04-01), Inoue

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