NCJ Number
36986
Date Published
1977
Length
18 pages
Annotation
THIS STANDARD ESTABLISHES PERFORMANCE REQUIREMENTS AND METHODS OF TEST FOR DEVICES THAT RESPOND TO ATTACK NOISES AT FREQUENCIES UP TO 10 KHZ AND ARE INTENDED TO PROVIDE PREMISE-PROTECTION OF VAULTS AND OTHER SECURE AREAS.
Abstract
THESE DEVICES CAUSE THE INITIATION OF A LOCAL AUDIBLE ALARM OR THE TRANSMISSION OF AN ALARM SIGNAL TO A POLICE DEPARTMENT OR A CENTRAL STATION. REPRESENTATIVE SAMPLES OF COMMERCIAL SOUND SENSING BURGLAR ALARMS WERE EVALUATED IN THE LABORATORY TO IDENTIFY PERFORMANCE CHARACTERISTICS AND APPROPRIATE TEST METHODS TO DETERMINE THE ABILITY OF THE EQUIPMENT TO PROVIDE RELIABLE, FALSE ALARM FREE OPERATION. AS A RESULT OF THIS STUDY, MINIMUM LEVELS OF PERFORMANCE WERE SELECTED FOR EACH PARAMETER WHICH EFFECTS THE UTILITY OF THE DEVICE. THIS STANDARD PROVIDES MINIMUM PERFORMANCE REQUIREMENTS AND METHODS OF TEST FOR FREQUENCY RESPONSE, MINIMUM SENSITIVITY, MAXIMUM SENSITIVITY, IMPACT NOISE SENSITIVITY, STANDBY POWER OPERATION, ELECTROMAGNETIC INTERFERENCE SUSCEPTIBILITY, CANCEL MICROPHONE OPERATION, TAMPER SWITCH, CABLE TAMPER PROTECTION, AND ELECTRICAL BALANCE CABLE PROTECTION. THE TOTAL SYSTEM, CONSISTING OF THE SENSING MICROPHONE AND THE CONTROL UNIT, MUST BE TESTED AS A SINGLE UNIT IN ORDER TO ADEQUATELY EVALUATE THE ALARM SYSTEM. (AUTHOR ABSTRACT) (SNI ABSTRACT)