The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2015
Filed:
Feb. 19, 2013
Joseph M. Matesa, Murrysville, PA (US);
Joseph M. Matesa, Murrysville, PA (US);
Other;
Abstract
An audible alarm detector is disclosed, consisting of a microphone, band-pass filter, counter and controller. The microphone converts the acoustic signal to an electrical signal for further processing. The band-pass filter removes frequencies different from the nominal frequency of a pulsed tone alarm. The counter detects the fundamental frequency of the filtered signal in sequential time intervals. The controller compares the counter's output for each time interval with the nominal count for the expected alarm frequency. The controller also compares the results from sequential time intervals against the nominal time-sequence of the anticipated, pulsed-tone alarm. A sufficiently close match results in a positive detection condition. An audible alarm detection method is also disclosed, consisting of low-pass filtering, followed by baseline-comparison, followed by counting, followed by discrimination based on counts, followed by comparison of discriminator output sequence versus the nominal sequence.