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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.
Heart Sounds01:15

Heart Sounds

Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
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Physical Assessment of the Respiratory Tract III: Percussion

The respiratory system, fundamental to life, consists of complex structures responsible for gas exchange. The percussion assessment is critical to understanding this system's health and functionality. This non-invasive assessment technique allows healthcare providers to evaluate the density or aeration of the lungs, thereby identifying potential abnormalities.
Percussion in Respiratory Assessment
Percussion evaluates underlying tissue composition with audible and tactile vibrations,...
Perceiving Loudness, Pitch, and Location01:21

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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.
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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...
The Cochlea01:13

The Cochlea

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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Related Experiment Video

Updated: May 23, 2026

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07:05

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Published on: August 24, 2017

Tinnitus.

Sven Vanneste1,2,3,4, Dirk De Ridder5,6,7, Silvano Gallus8

  • 1School of Psychology, Trinity College Dublin, Dublin, Ireland. sven.vanneste@tcd.ie.

Nature Reviews. Disease Primers
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Tinnitus, the perception of sound without an external source, affects 14% of adults. Understanding its complex mechanisms and comorbidities is key to effective multimodal management and future research.

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Area of Science:

  • Neuroscience
  • Audiology
  • Otolaryngology

Background:

  • Tinnitus affects 14% of adults, with 2% experiencing severe symptoms.
  • Complex mechanisms involve peripheral and central nervous system processes, including cochlear injury, maladaptive plasticity, and altered brain network activity.
  • Tinnitus often co-occurs with conditions like hearing loss, anxiety, and insomnia, complicating diagnosis and treatment.

Purpose of the Study:

  • To review the underlying mechanisms, clinical presentation, and diagnostic approaches to tinnitus.
  • To outline current multimodal management strategies and emerging therapeutic avenues.
  • To highlight key areas for future research in tinnitus.

Main Methods:

  • Comprehensive review of current literature on tinnitus pathophysiology, clinical features, diagnosis, and management.
  • Analysis of diagnostic criteria, including differentiation of objective and subjective tinnitus and identification of red flags.
  • Evaluation of established and novel treatment modalities, including behavioral therapies, hearing rehabilitation, and neuromodulation techniques.

Main Results:

  • Tinnitus pathophysiology involves cochlear injury, central nervous system plasticity, altered brain connectivity, and neuroinflammation.
  • Clinical presentation is heterogeneous, with frequent comorbidities impacting patient care.
  • Multimodal management, including counseling, cognitive behavioral therapy, and hearing rehabilitation, is effective.
  • Emerging treatments like bimodal stimulation show promise for specific patient groups.

Conclusions:

  • Effective tinnitus management requires a multimodal approach addressing its complex pathophysiology and comorbidities.
  • Continued research into biomarkers, genetics, inner ear regeneration, and novel neuromodulation is crucial for advancing tinnitus care.
  • Future research directions include digital therapeutics and closed-loop neuromodulation for personalized tinnitus treatment.