Sound activated device and method

Details Sound activated device and method Sound activated device and method

1990-02-23

1991-04-30

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340628, 367199, 367197, G08B 100, H04Q 130, G10K 1100

Patent

active

050122231

ABSTRACT:
A smoke alarm activated device includes a sound receiver and signal converting device for receiving a sound wave analog signal emitted from a smoke alarm in response to the sensed presence of smoke. The signal is received and converted into a digital signal containing the informational characteristics contained within the transmitted sound wave. The digital signal is detected in a first time period which first time is identical to the time period in which the sound wave is generated. The absence of the digital signal in a second time period is detected, which second time period is identical to the time period in which the detected sound wave is absent. An output control signal is generated when the presence of the digital signal is detected in the first time period and the absence of the digital signal is detected in the second time period. A device is activated in response to the output control signal.

REFERENCES:
patent: 4417235 (1983-11-01), Del Grande
patent: 4446454 (1984-05-01), Pyle
patent: 4617555 (1986-10-01), Sheiman

Affiliated with

Also associated with

Rating

Sound activated device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sound activated device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sound activated device and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-643349