Accession Number:

AD0761085

Title:

Cold-Weather Vehicle Signature Studies.

Descriptive Note:

Technical rept. 1 Feb 71-15 Apr 72,

Corporate Author:

MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s):

Report Date:

1972-05-01

Pagination or Media Count:

114.0

Abstract:

The report summarizes the results of an acoustics, seismics, and magnetics research program with the fundamental purpose of examining the effects of seasonal changes on vehicle signatures. Primary emphasis is given to the examination of seismic data, since the seasonal effects are more outstanding in these data and not as well understood for that area of physics. The results of the research indicate that road roughness has the most significant effect on the signature of trucks, while the amount of acoustic coupling to the ground has the most significant effect on the signature for tanks. The results also indicate that the presence of a heavy snow layer acted as an acoustic barrier between the sound front and the earths surface, thus greatly reducing the ground-coupled sound under winter conditions. Modified author abstract

Subject Categories:

  • Surface Transportation and Equipment
  • Acoustic Detection and Detectors
  • Magnetic and Electric Field Detection and Detectors
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE