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Hearing

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.

Perception of Sound Waves

Perception of Sound Waves

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...

Physical Assessment of the Respiratory Tract IV: Auscultation

Physical Assessment of the Respiratory Tract IV: Auscultation

Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.

Auditory Perception

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...

Cognitive Development During Adulthood

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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...

Attention-Deficit/Hyperactivity Disorder

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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.

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Related Experiment Video

Updated: Jul 16, 2026

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

Self-reported hearing problems in daily life throughout adulthood

E B Slawinski¹, D M Hartel, D W Kline

¹Department of Psychology, University of Calgary, Alberta, Canada.

Psychology and Aging

|December 1, 1993

Summary

Hearing problems increase with age, affecting speech perception in noise and sound clarity. Self-report measures reveal daily life impacts beyond traditional lab studies.

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An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

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Published on: March 13, 2026

Area of Science:

Audiology
Gerontology
Psychophysics

Background:

Age-related hearing loss is a growing concern.
Traditional auditory studies often lack real-world context.

Purpose of the Study:

To investigate age-related differences in self-reported hearing problems.
To assess the impact of hearing difficulties on auditory task performance in natural environments.

Main Methods:

Administered the "Your Hearing" questionnaire to 265 participants (aged 20-94).
Assessed self-reported hearing problems and their correlation with age.

Main Results:

Both the degree and variability of hearing problems significantly increased with age.
Age-related hearing issues impacted speech perception in noise, sound clarity, and high-frequency sound detection.
Individuals perceiving their hearing as poor reported greater experienced hearing problems.

Conclusions:

Self-report measures offer valuable insights into age-related hearing disability.
These insights complement traditional laboratory-based auditory studies by reflecting real-life impacts.