Accession Number : ADD008714

Title :   Seismic Parameter Measurement Method and Apparatus.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Giovanni,Rondald D San

Report Date : 20 Jul 1981

Pagination or Media Count : 10

Abstract : The apparatus comprises a geophone connected to a circuitry case containing a battery, a voltage regulator, a solid state preamplifier and amplifier tuned to respond to seismic signals between 2 and 25 Hz. The amplified seismic signals are rectified and applied to a microammeter connected to efficiently respond to pulsations at the step frequency of walking or crawling personnel. The apparatus can be used to measure seismic noise and to determine soil conditions prior to the emplacement of an intrusion detection system. (Author)

Descriptors :   *Patent applications, *Geophones, *Seismic detection, *Intrusion detectors, Target discrimination, Soils, Seismic waves, Area coverage, Spatial distribution, Integrated circuits, Preamplifiers, Solid state electronics

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE