ACOUSTIC REFLEX RESPONSE TO HIGH INTENSITIES OF IMPULSE NOISE AND TO NOISE AND CLICK STIMULI
Abstract
Temporary threshold shifts (TTS) in 15 subjects were measured following exposure to 170 or 160 db sound pressure level (SPL) impulse noise under three conditions of acoustic reflex (AR). In one the AR was not aroused prior to exposure; in another the impulse noise was preceded by 150 msec by clicks at either 105 or 120 db sensation level (SL); in a third the impulse was preceded by noise at 105 or 120 db SL. The only significance in main variables was found between TTS with AR protection and TTS without AR protection. Some of the interactions involving subjects were significant but were considered of little import.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 22, 1961
- Accession Number
- AD0271071
Entities
People
- J. L. Fletcher
Organizations
- United States Army Medical Research Laboratory