Related Experiment Video

Updated: Jul 17, 2026

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
14:05

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

High-frequency audiometry in young and older adults when conventional audiometry is normal

Isabella Monteiro de Castro Silva1, Maria Angela Guimarães Feitosa

  • 1Centro Universitário Planalto do Distrito Federal, University of Brasilia, DF, Brazil. isabella@apis.com.br

Brazilian Journal of Otorhinolaryngology
|January 16, 2007
PubMed
Summary

High-frequency audiometry reveals age-related hearing decline even in normal-hearing adults. This sensitive hearing test can detect early auditory aging in older adults, distinguishing them from younger individuals.

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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 frequency...
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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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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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