SOME PRELIMINARY STUDIES OF TEMPORARY THRESHOLD SHIFT WITH AN ARC-DISCHARGE IMPULSE NOISE GENERATOR,

Abstract

Preliminary studies with an arc-discharge (sparkgap) impulse-noise generator produced data not entirely in line with previous experiments (employing longer pulses) with respect to the effects of variation of number and spacing of pulses and preactivation of the acoustic reflex n temperorary threshold shift (TTS). Specifically, growth of TTS with number of pulses was not linear but was less than logarithmic, and moderately loud sounds before each pulse, presumably intense enough to activate the reflex, were ineffective in reducing TTS. On the other hand, when an equal number of impulses were presented at a fast repetition rate, or when more intense activating stimuli were presented at a slow pulse-repetition rate, less TTS was observed. The TTS observed was greatest at high frequencies, especially at 6000 cps and above. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 17, 1965
Accession Number
AD0467139

Entities

People

  • John L. Fletcher
  • Michel Loeb
  • Robert W. Benson

Organizations

  • United States Army Medical Research Laboratory

Tags

DTIC Thesaurus Topics

  • Electric Arcs
  • Energy Systems
  • Frequency
  • Generators
  • Impulse Noise
  • Noise
  • Noise Generators
  • Repetition Rate

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Electrical Engineering
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Space
  • Space - Hall-Effect Thruster