Analysis of Nonlinear Insertion Loss of Hearing Protection Devices using an Acoustic Test Fixture

Abstract

The report details insertion loss measurements from multiple types of hearing protection devices in order to examine the nonlinearity of insertion loss. Tests were conducted in continuous noise from 55 to 130 decibels (dB) and impulsive noise from 110 to 170 dB peak sound pressure levels. Results show that predictive models for the protective capacity of hearing protection should account for variability in insertion loss, depending on the incident sound pressure level.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2015
Accession Number
AD1005236

Entities

People

  • Efrem Reeves
  • Michael Chen
  • Robert Williams

Organizations

  • United States Army Aeromedical Research Lab

Tags

Communities of Interest

  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Attenuation
  • Data Acquisition
  • Data Analysis
  • Ear
  • Free Field
  • Frequency
  • Frequency Bands
  • Hearing Protection
  • High Gain
  • Impulse Noise
  • Microphones
  • Noise Reduction
  • Radio Communications
  • Regression Analysis
  • Test And Evaluation
  • Test Fixtures
  • Transducers

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Electronics Engineering