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Related Concept Videos

Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
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Hearing01:31

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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Increasing Hearing Readiness Using Boothless Audiometry.

Benjamin Sheffield1,2, Devon Kulinski2, Jaclyn Schurman2

  • 1Hearing Conservation and Readiness Branch, Defense Centers for Public Health - Aberdeen, Aberdeen Proving Ground, MD 21010, USA.

Military Medicine
|November 10, 2023
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Summary
This summary is machine-generated.

Boothless audiometers effectively supplement standard hearing tests for U.S. Army soldiers, restoring hearing readiness post-COVID-19. This innovation enhances military audiology and hearing conservation programs.

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Area of Science:

  • Military audiology
  • Occupational health
  • Hearing conservation

Background:

  • U.S. Army regulations mandate annual audiometric testing for soldier hearing readiness.
  • The COVID-19 pandemic disrupted traditional multi-person, in-booth audiometry, causing significant declines in hearing readiness.
  • The Army Hearing Program sought innovative solutions to maintain audiological surveillance.

Purpose of the Study:

  • To evaluate the efficacy of boothless audiometers as a supplement to standard audiometric testing.
  • To assess the impact of boothless audiometry on hearing readiness within the U.S. Army.
  • To explore additional capabilities offered by boothless audiometry for hearing health.

Main Methods:

  • 169 boothless audiometers were procured using CARES Act funding.
  • Standard operating procedures were developed for boothless testing, matching traditional parameters.
  • Automated contralateral masking, tinnitus screening, and hearing health education were integrated.

Main Results:

  • Nearly 12,000 service members were tested worldwide using boothless audiometers.
  • Thresholds from boothless audiometry showed comparable results to standard in-booth testing (mean difference -1.2, 95% CI -0.9 to 0.9).
  • Hearing readiness returned to pre-pandemic levels at sites utilizing boothless audiometers.

Conclusions:

  • Boothless audiometers provided an effective solution to pandemic-related disruptions in hearing readiness.
  • The technology demonstrated comparable accuracy to traditional methods.
  • Innovations from this initiative offer potential improvements for permanent inclusion in DoD Hearing Conservation Programs.