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NCJRS Abstract

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NCJ Number: 148774 Find in a Library
Title: Electronic Eavesdropping Techniques and Equipment
Author(s): R N Jones
Corporate Author: National Institute of Standards and Technology (NIST)
United States of America
Date Published: 1975
Page Count: 45
Sponsoring Agency: National Institute of Justice/
Rockville, MD 20849
National Institute of Standards and Technology (NIST)
Gaithersburg, MD 20899-3460
NCJRS Photocopy Services
Rockville, MD 20849-6000
Superintendent of Documents, GPO
Washington, DC 20402
US Dept of Justice
Sale Source: Superintendent of Documents, GPO
Washington, DC 20402
United States of America

National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Survey
Language: English
Country: United States of America
Annotation: This report is designed to inform law enforcement offices about the application and functioning of undercover communications equipment and to act as the forerunner of a voluntary standard to be used in the selection, evaluation, and procurement of such equipment.
Abstract: The data used were derived from law enforcement personnel, manufacturers, publications, and laboratory measurements. The equipment discussed in the report are concerned only with the interception of voice or audio communications; this report does not cover video or optical techniques. The first section deals with radiating devices and receivers, and discusses power output, operating time, and operating distance; crystal control vs. free-running oscillators; ease of detection; modulation and audiofrequency response; packaging; antennas; propagation conditions; and telephone tapping transmitters. Subsequent chapters examine tests of radiating devices, nonradiating devices, and tape recorders. 2 appendixes
Main Term(s): Science and Technology
Index Term(s): Electronic surveillance; Police equipment
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