NILECJ standard for sound sensing units for intrusion alarm systems : a voluntary national standard promulgated by the National Institute of Law Enforcement and Criminal Justice
Dept. of Justice, Law Enforcement Assistance Administration, National Institute of Law Enforcement and Criminal Justice : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977 - Technology & Engineering - 14 pages
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2000 Hz octave accordance with paragraph acoustic test chamber adjust the sensitivity American National Standard attack noises band center frequency band of white Cable Tamper Protection cause the unit chassis conducted interference Criminal Justice decibels Electromagnetic Interference end frequencies Enforcement and Criminal enter the alarm environmental test chamber equipment paragraph 5.4 frequency of 2000 Hz octave band Impact Noise Sensitivity impedance Institute of Law INTRUSION ALARM SYSTEMS level of 65 Maximum Sensitivity micropascals minimum operating sensitivity minimum sound level Night Vision Devices NILECJ STANDARD octave band noise ratio seconds between tests sensing microphone Sensitivity Test set the sound signal an alarm Sound Level Meters SOUND PRESSURE LEVEL sound sensing device sound sensing unit standby power Tamper Resistance temperature test chamber paragraph test two additional tested in accordance third-octave band timer Underwriters Laboratories unit enters unit in accordance unit to enter unit to signal UNITS FOR INTRUSION white noise