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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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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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The Auditory Ossicles01:11

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The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
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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...
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Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
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Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

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Bone conduction hearing: device auditory capability to aid in device selection.

Mark J Syms1, Kelly E Hernandez

  • 1Neurotology, Barrow Neurological Institute, Phoenix, Arizona, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|March 6, 2014
PubMed
Summary
This summary is machine-generated.

This study compared eight bone conduction devices for single-sided deafness (SSD). The nonsurgical SoundBite device offered superior output and gain at higher frequencies compared to surgical options.

Keywords:
Bahabone conductiondentalpresbycusissingle-sided deafness

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Area of Science:

  • Audiology
  • Biomedical Engineering
  • Otolaryngology

Background:

  • Bone conduction devices are crucial for treating hearing loss, particularly single-sided deafness (SSD).
  • Understanding the laboratory performance of various surgical and nonsurgical devices is essential for clinical application.
  • Variations in device characteristics may impact patient outcomes, especially concerning higher frequencies and age-related hearing loss (presbycusis).

Purpose of the Study:

  • To conduct identical laboratory measurements of eight bone conduction devices (seven surgical, one nonsurgical).
  • To compare the maximum output and gain parameters of these devices.
  • To relate laboratory findings to potential clinical function in patients with SSD.

Main Methods:

  • Laboratory-based measurements were performed on seven surgical and one nonsurgical bone conduction device.
  • Each device was characterized using a standardized laboratory system and descriptive statistics.
  • Key performance metrics, including maximum output and gain, were measured across different frequency ranges.

Main Results:

  • Maximum output varied significantly across devices, with ranges of 98.8-119.2 dB in the pure-tone average (PTA) range and 88.99-119.6 dB in the above-PTA range.
  • Maximum gain also showed variability, averaging 40 dB in the PTA range and 32.0 dB in the above-PTA range.
  • The nonsurgical SoundBite device demonstrated higher output and gain in the above-PTA range compared to surgical devices.

Conclusions:

  • All tested bone conduction devices provide adequate maximum output and gain for the PTA frequency range in SSD.
  • Significant differences in output and gain exist for frequencies above the PTA, impacting presbycusis management and auditory optimization.
  • Surgical devices showed reduced performance in the above-PTA range, while the nonsurgical device excelled in this higher frequency spectrum.