AUDIO COUNTERMEASURES EQUIPMENT EQUIPMENT EFFECTIVENESS CATEGORY APPLICATION OPERATING PRINCIPLE 1. WIRE TAP DETECTOR DETERMINE EXISTANCE OF TELEPHONE LINE TAP MONITORS TELEPHONE LINE VOLTAGE FOR CHANGE LITTLE OR NONE 2. RADIO TAP DETECTORS DETERMINES EXISTANCE OF RADIO XMTR WITHIN TELEPHONE SENSES FIELD STRENGTH NEAR TELEPHONE MAY DETERMINE PRE-SENCE OF OPERATING RADIO XMTR WITHIN TELEPHONE INSTRUMENT 3. INFINITY XMTR DETECTOR DETERMINES EXISTANCE OF ACTIVE INFINITY XMTR MONITORS TELEPHONE LINE VOLTAGE FOR CHANGE WILL CONFIRM EXISTANCE OF ACTIVE INFINITY DEVICE 4. INFINITY XMTR ACTIVATOR ACTIVATES INFINITY XMTR PLACES AUDIO TONES ON TELEPHONE LINE SHOULD ACTIVATE MANY SINGLE TONE DEVICES FEW MULTI TONE DEV. 5. TELEPHONE ANALYZERS LOCATE TELEPHONE MODIFICATIONS CHECK AND VERIFICATION OF TELEPHONE INSTRUMENTS INTERNAL WIRING SHOULD LOCATE MANY TELEPHONE MODS. 6. TELEPHONE LINE DISCONNECTS PROTECT AGAINST TELEPHONE MODS. ELECTRICALLY SEPARATES UNUSED TELEPHONE INSTRUMENT FROM OUTGOING LINES GOOD PROTECTION AGAINST TELEPHONE MODIFICATIONS 7. FIELD STRENGTH DETECTORS -SNIFFER-SQUEALER LOCATE OPERATING RADIO XMTING BUGS SENSES RADIO ENERGY OVER PORTION OF THE RADIO SPECTRUM IN A LOCAL AREA SOME DETECTION CAPABILITY IF PROPERLY USED 8. COUNTERMEASURES RADIO RCVR DETECTS OPERATING RADIO XMTING BUGS SENSES SPECIFIC RADIO FREQ-UENCIES WHEN TUNED OVER LARGE PORTION OF RADIO FREQS GOOD DETECTION OF MOST OPERATIONAL RADIO DEVICES 9. SPECTRUM RADIO RCVR DETECTS OPERATING RADIO XMTING BUGS, SIGNAL ANALYSIS SENSES AND DISPLAYS SELECTED BROAD SPECTRUM OF RADIO SPECTRUM GOOD DETECTION OF MOST OPERATIONAL RADIO DEVICES 10. X-RAYS VIEW SOLID OBJECTS FOR CONCEALED DEVICES X-RAY PHOTOGRAPHY OR FLUOROSCOPY CAN LOCATE CONCEALED METALLIC OR OBJECTS OF DISSIMILAR NATURE 11. RADIO JAMMING SYSTEMS JAM RADIO DEVICE TRANSMISSION GENERATE AND RADIATE HASH NOISE OVER LARGE SECTIONS OF RADIO SPECTRUM LIMITED 12. AUDIO JAMMING JAMS MICROPHONES PRODUCES AUDIO NOISE IN LOCAL AREA TO MASK CONVERSATIONS IF USED PROPERLY WILL EFFECTIVELY DIS RUPT ABILITY OF EAVESDROPPING DEVICE TO RECEIVE AUDIO 13. AUDIO PROTECTION ROOMS ISOLATE SENSITIVE CONVERSATIONS FROM POTENTIAL LISTENER PREVENT SOUND FROM CARRYING TO MICROPHONE THROUGH PROTECTIVE WALLS VERY EFFECTIVE 14. RADIO FREQUENCY SHIELDED ROOMS PREVENTS RADIO TRANS-MISSIONS FROM AREA BLOCKS PASSAGE OF RADIO FREQUENCY ENERGY VERY EFFECTIVE 15. METAL DETECTORS LOCATE METALIC OBJECTS SENSES CHANGES IN MAGNETIC FIELD CAUSED BY HIDDEN METALIC OBJECTS CAN LOCATE METALLIC OBJECTS CONCEALED IN NONMETALIC ENVIRON. 16. NON LINEAR JUNCTION DETECTOR LOCATE ELECTRONIC DEVICES, EVEN WHEN TURNED OFF SENSES RETURNED RF SIGNAL FROM EXCITED ELECTRONIC JUNCTION VERY EFFECTIVE WHEN LIMITATIONS ARE OBSERVED 17. AUDIO AMPLIFIER ELECTRONIC AUDIO AMPLIFIER ELECTRONIC AMPLIFICATION OF AUDIBLE SIGNALS ON WIRES, MICROPHONES VERY EFFECTIVE 18. INFRA RED DETECTOR/CAMERA DETECTION OF INVISIBLE (IR) LIGHT SOURCES ELECTRONIC DETECTION OF IR LIGHT SOURCES VERY EFFECTIVE