Accession Number : AD0717232

Title :   Growth and Recovery of Temporary Threshold Shifts Following Extended Exposure to High-Level, Continuous Noise.

Descriptive Note : Interim rept.,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Mosko,James D. ; Fletcher,John L. ; Luz,George A.

Report Date : 24 NOV 1970

Pagination or Media Count : 15

Abstract : A study was undertaken to evaluate the growth and recovery of temporary threshold shifts produced by extended exposure to simulated armored vehicle noise. Seventeen young adult males were continuously exposed to simulated armored vehicle noise over a 48-hour period. Auditory thresholds were obtained prior to exposure, during exposure, and after termination of exposure in order to permit the plotting of growth and recovery function for temporary threshold shift. Mathematical functions were used to describe the time-course of both the growth and recovery function. The data support the idea that an exponential mathematical function best describes both the growth and recovery functions for the temporary threshold shifts produced in this study. In addition, the data support earlier findings which indicate that an exponential model for temporary threshold shift is perhaps the most applicable model for use in designing dosimeters for noise exposure. (Author)

Descriptors :   (*AUDITORY PERCEPTION, DAMAGE), (*ARMORED VEHICLES, NOISE), (*THRESHOLDS(PHYSIOLOGY), RECOVERY), TIME, DAMAGE ASSESSMENT, ARMY RESEARCH, AUDIOMETRY, MATHEMATICAL MODELS, EXPOSURE(PHYSIOLOGY), SIMULATION, EAR PROTECTORS, HELMETS, EXPONENTIAL FUNCTIONS

Subject Categories : Anatomy and Physiology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE