Sonic detector having digital sampling circuit

Details Sonic detector having digital sampling circuit Sonic detector having digital sampling circuit

1985-11-22

1986-12-30

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340 65, 340683, G08B 1300

Patent

active

046332340

ABSTRACT:
A sonic detector for security applications or the like includes a digital sampling circuit which converts sound waves into digital pulses and stores the pulses in a counter that is periodically reset by a timing circuit. If a predetermined number of pulses are accumulated in the counter before the counter is reset, an alarm signal is generated to energize an alarm. The duration of the pulses may be altered to compensate for the effects of reflected sound which vary depending on the ambient acoustical environment. The number of pulses required to generate an alarm signal may be preprogrammed in accordance with the type of sounds to be detected. An anti-defeat circuit converts a continuous sound wave to the required number of digital pulses for generating an alarm.

REFERENCES:
patent: 3543261 (1970-11-01), Burney
patent: 3579220 (1971-05-01), Stevenson, Jr.
patent: 3713128 (1973-01-01), Wong et al.
patent: 3913085 (1975-10-01), Farstad
patent: 4081785 (1978-03-01), Ravis et al.
patent: 4196423 (1980-04-01), Carver et al.
patent: 4386343 (1983-05-01), Shively
patent: 4441103 (1984-04-01), Urabe

Affiliated with

Also associated with

Rating

Sonic detector having digital sampling circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sonic detector having digital sampling circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonic detector having digital sampling circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1550446