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Related Concept Videos

Hearing01:31

Hearing

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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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Unrenewable Cells00:50

Unrenewable Cells

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In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
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The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
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Perception of Sound Waves01:01

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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
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Related Experiment Video

Updated: Aug 14, 2025

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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Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Published on: January 23, 2017

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Hearing loss in school-aged children.

Mariela C Torrente1,2, Natalia Tamblay2, Javiera Herrada1

  • 1Hospital Clínico de la Universidad de Chile, Santiago, Chile.

Acta Oto-Laryngologica
|January 13, 2023
PubMed
Summary
This summary is machine-generated.

Hearing loss affects 5% of the global population. This review details hearing loss prevalence in school-aged children, with reported rates varying widely due to differing definitions and causes.

Keywords:
Hearing lossincidenceprevalenceschool aged

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Area of Science:

  • Pediatrics
  • Public Health
  • Audiology

Background:

  • Hearing loss is a significant global disability impacting 5% of the population.
  • Accurate epidemiological data is crucial for developing effective public health policies for hearing health.
  • Timely diagnosis of hearing loss is essential for individual and societal well-being.

Approach:

  • A comprehensive literature review was conducted using the PubMed database.
  • The review focused on identifying and analyzing studies reporting on the prevalence and incidence of hearing loss in school-aged children.
  • Data synthesis aimed to consolidate existing epidemiological information.

Key Points:

  • Prevalence of hearing loss in school-aged children ranges from 0.2% to 7.8%.
  • Discrepancies in reported prevalence are attributed to variations in the definition of hearing loss, its causes, and the inclusion of high-frequency hearing loss.
  • The incidence of delayed-onset hearing loss by age six is between 0.6 and 0.8 per 1000 children.

Conclusions:

  • The wide variability in reported hearing loss prevalence underscores the need for standardized diagnostic criteria and reporting methods.
  • Understanding the epidemiology of hearing loss in children is vital for targeted interventions and resource allocation.
  • Further research is needed to elucidate the specific factors contributing to the observed prevalence ranges and delayed-onset hearing loss.