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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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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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Unrenewable Cells00:50

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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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Related Experiment Video

Updated: Apr 1, 2026

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

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Acquired Hearing Loss in Children.

Margaret A Kenna1

  • 1Otolaryngology and Communication Enhancement, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, BCH3129, Boston, MA 02115, USA.

Otolaryngologic Clinics of North America
|October 11, 2015
PubMed
Summary

Pediatric hearing loss, a common congenital impairment, affects millions globally. Early identification through comprehensive evaluations is crucial for managing hearing loss and supporting child development.

Keywords:
Cytomegalovirus (CMV)Enlarged vestibular aqueductMeningitisNoiseRubellaSudden sensorineural hearing lossSyphilisToxoplasmosis

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Area of Science:

  • Audiology
  • Pediatrics
  • Public Health

Background:

  • Hearing loss is the most prevalent congenital sensory impairment.
  • National data indicates 20.3% of individuals aged 12+ have some form of hearing loss.
  • The World Health Organization estimates 360 million people worldwide experience disabling hearing loss, with a significant portion being preventable.

Purpose of the Study:

  • To identify the degree and type of pediatric hearing loss.
  • To determine the underlying etiology of hearing loss in children.
  • To develop a comprehensive strategy for language, social development, and communication in affected children.

Main Methods:

  • Utilizing National Health and Nutrition Examination Survey (NHANES) data (2001-2008).
  • Analysis of prevalence rates for unilateral or bilateral hearing loss in a large subject cohort.
  • Review of global statistics from the World Health Organization.

Main Results:

  • Prevalence of hearing loss in the surveyed population aged 12 and older was 20.3%.
  • Significant global burden of disabling hearing loss, with 50% potentially preventable.
  • Recognition that hearing loss can be congenital, acquired, or linked to preexisting conditions.

Conclusions:

  • Pediatric hearing evaluations are essential for early detection and diagnosis.
  • Comprehensive strategies are necessary to mitigate the impact of hearing loss on child development.
  • Addressing preventable causes of hearing loss is a key public health objective.