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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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Variation: Normal Distribution, Range, and Standard Deviation02:32

Variation: Normal Distribution, Range, and Standard Deviation

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In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
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The Auditory Ossicles01:11

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The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
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Auditory Pathway01:15

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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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Auditory Perception01:17

Auditory Perception

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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...
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Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Related Experiment Video

Updated: Feb 7, 2026

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
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High-frequency auditory thresholds in normal hearing adults.

Sheila Jacques Oppitz1, Luize Caroline Lima da Silva1, Michele Vargas Garcia1

  • 1Departamento de Fonoaudiologia, Universidade Federal de Santa Maria - UFSM - Santa Maria (RS), Brasil.

Codas
|August 2, 2018
PubMed
Summary
This summary is machine-generated.

High-frequency hearing thresholds increase with both higher frequencies and advancing age in adults with normal hearing. This study found a significant increase in the right ear, particularly at higher tested frequencies.

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Area of Science:

  • Audiology
  • Gerontology
  • Otolaryngology

Background:

  • Normal hearing is typically defined by auditory thresholds between 250-8000 Hz.
  • Aging is a known factor influencing hearing sensitivity, but high-frequency changes require further investigation.

Purpose of the Study:

  • To evaluate high-frequency auditory thresholds in normal-hearing adults.
  • To compare ear responses and correlate hearing levels with aging.
  • To analyze frequency-specific responses in relation to age.

Main Methods:

  • Prospective, quantitative, transversal study with 60 normal-hearing adults (aged 18-58).
  • High-frequency pure-tone hearing thresholds (up to 14 kHz) measured using an Interacoustics AS10HF audiometer.
  • Acoustic immittance measurements confirmed normal middle ear function.

Main Results:

  • A statistically significant increase in hearing thresholds for the right ear at 10, 11, and 14 kHz.
  • A trend towards significance at 13 kHz in the right ear.
  • Bilateral progressive threshold increases proportional to frequency and age advancement observed from 14 kHz upwards.

Conclusions:

  • High-frequency auditory thresholds increase with frequency and age in normal-hearing individuals.
  • The right ear exhibited higher thresholds compared to the left ear.
  • These findings highlight age-related high-frequency hearing changes even in individuals with clinically normal hearing.