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:
Jun. 12, 2018
Filed:
Mar. 01, 2017
Samuel L. Thomasson, Gilbert, AZ (US);
Samuel L. Thomasson, Gilbert, AZ (US);
Other;
Abstract
A security system includes a transducer within a monitored space responsive to audio signals therein. An analog-to-digital converter couples the transducer to the input of a digital signal processor. Time-staggered digital samples are stored, and are each multiplied by the current sample in a corresponding series of multipliers, and accumulated in a like series of accumulators. Accumulated sums, generated by the series of accumulators during known, undisturbed periods, are stored. During active monitoring, the processor compares currently generated accumulated sums to the previously stored accumulated sums generated during undisturbed periods. The processor creates an alarm signal when current values for the accumulated sums do not correspond to accumulated sums previously stored during undisturbed periods.