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Related Experiment Videos

Environmental awareness and level-dependent hearing protection devices

G A Lindley1, C V Palmer, H Goldstein

  • 1University of Pittsburgh, Pennsylvania, USA.

Ear and Hearing
|February 1, 1997
PubMed
Summary

Level-dependent hearing protection devices (HPDs) impaired sound identification at 100 yards but maintained auditory awareness closer. These HPDs may be suitable for certain hunting and shooting scenarios.

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Area of Science:

  • Audiology
  • Environmental Acoustics
  • Hearing Protection Technology

Background:

  • Level-dependent hearing protection devices (HPDs) are designed to protect hearing while allowing awareness of environmental sounds.
  • These devices are marketed towards hunters and shooters, suggesting a need for auditory awareness in these activities.
  • Understanding the real-world effectiveness of these HPDs in sound identification is crucial for user safety and performance.

Purpose of the Study:

  • To investigate the impact of two commercially available level-dependent HPDs (SoundScope and Sonic II) on the ability to identify environmental sounds.
  • To compare the sound identification performance with HPDs versus an open-ear condition in a simulated hunting/shooting environment.

Main Methods:

  • Eighteen participants without prior hunting experience attempted to identify various recorded sounds (animal and human) at different distances.

Related Experiment Videos

  • Sound identification was assessed under three conditions: SoundScope HPDs, Sonic II HPDs, and an open-ear (no HPDs) condition.
  • The Knowles Electronic's Manikin for Auditory Research was used for standardized sound recordings.

    • Main Results:

    • Overall sound identification scores (SISs) varied significantly across the three listening conditions.
    • The open-ear condition yielded the highest SIS (96.43%), while the Sonic II condition resulted in the lowest (84.13%).
    • Significant differences in sound identification performance between conditions were primarily observed at a distance of 100 yards.

    Conclusions:

    • Neither SoundScope nor Sonic II HPDs fully maintained auditory awareness at 100 yards.
    • Auditory awareness was preserved by both HPDs at distances of 75 yards and closer.
    • The suitability of these HPDs for hunting/shooting depends on factors like game type, environment, and weapon range, with potential utility in recreational shooting.