INVESTIGATION OF AUDITORY DISCRIMINATION OF SEISMIC SIGNALS FROM EARTHQUAKES AND EXPLOSIONS

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1964
Accession Number
AD0437784

Entities

People

  • G. E. Frantti
  • L. A. Levereault

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Contracts
  • Data Processing
  • Detection
  • Discrimination
  • Earthquakes
  • Explosions
  • False Alarms
  • Frequency
  • Recording Systems
  • Standards
  • Surface Waves
  • Tape Recording
  • Time Compression
  • Warning Systems
  • Waves

Readers

  • Seismology
  • Speech Processing/Speech Recognition.