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Related Concept Videos

Hearing01:31

Hearing

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.
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...

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Related Experiment Video

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An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
07:52

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EchoScan: a new system to objectively assess peripheral hearing disorders.

Thomas Venet1, Pierre Campo, Cécile Rumeau

  • 1National Institute of Research and safety (INRS) CS 60027, F-54519 vandoeuvre Cedex, France.

Noise & Health
|November 3, 2012
PubMed
Summary

A new device, EchoScan, combines otoacoustic emissions and acoustic stimulation to assess middle and inner ear function. This innovative approach shows promise for early hearing loss detection and auditory monitoring.

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Area of Science:

  • Audiology
  • Otoacoustic Emissions
  • Hearing Science

Background:

  • Pure-tone air-conduction audiometry (PTA) is the standard clinical hearing loss test but cannot identify the source of impairment.
  • Distortion product otoacoustic emissions (DPOAEs) detect inner ear dysfunction, particularly outer hair cell damage from noise and ototoxicants.
  • Ototoxicants can affect central auditory pathways influencing the middle ear acoustic reflex.

Purpose of the Study:

  • To introduce EchoScan, a novel device for assessing both middle and inner ear function.
  • To evaluate EchoScan's ability to detect hearing issues using DPOAEs and contralateral acoustic stimulation.
  • To explore EchoScan's potential for early hearing loss detection and auditory monitoring.

Main Methods:

  • Utilized a battery of distortion product otoacoustic emission (DPOAE) measurements.
  • Incorporated contralateral acoustic stimulation with DPOAE measurements.
  • Compared EchoScan's performance to impedancemetry for stapedial reflex detection.

Main Results:

  • EchoScan detected changes in DPOAE amplitude related to aging and gender.
  • EchoScan demonstrated higher sensitivity than impedancemetry in detecting the stapedial reflex.
  • The device measures performance in both the middle and inner ear.

Conclusions:

  • EchoScan offers a novel approach to assess auditory function by integrating DPOAEs and acoustic stimulation.
  • The device is sensitive to stapedial reflex changes and shows potential for early hearing loss detection.
  • EchoScan is suitable for clinical investigations and occupational health, particularly for monitoring individuals exposed to noise or ototoxic agents.