Accession Number : AD0437784
Title : INVESTIGATION OF AUDITORY DISCRIMINATION OF SEISMIC SIGNALS FROM EARTHQUAKES AND EXPLOSIONS
Descriptive Note : Final rept.
Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY
Personal Author(s) : Frantti, G E ; Levereault, L A
Report Date : Apr 1964
Pagination or Media Count : 48
Abstract : Magnetic tape recordings of short-period seismic signals from approximately 200 earthquakes and explosions were time-compressed by a factor of up to 512 to shift seismic frequencies to the audible range. These seismic data include the inhomogeneities introduced by substantial variations in the locations of sources and receivers (world-wide), propagation path length (32 to 7000 km), and source magnitude (M = 0.5 to M = 6.5). Subjects were trained with a representative set of the seismic sounds. Auditory experiments were conducted to determine the ability of the human auditory system to distinguish between seismic signals from earthquakes and explosions. The results of the experiments suggest that a trained listener can identify approximately two thirds of the seismic sounds presented.
Descriptors : *SEISMIC WAVES , AUDITORY PERCEPTION , DATA PROCESSING , DECISION MAKING , DETECTION , EARTHQUAKES , MAGNETIC TAPE , NUCLEAR EXPLOSIONS , PROPAGATION , RECORDING SYSTEMS , SEISMOGRAPHS , WAVE PROPAGATION
Subject Categories : Seismology
Distribution Statement : APPROVED FOR PUBLIC RELEASE