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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.

Perceiving Loudness, Pitch, and Location

Perceiving Loudness, Pitch, and Location

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.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...

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...

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A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis ALS

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Enhancing speech perception in noise through articulation.

Maxime Perron^1,2, Qiying Liu^1,2, Pascale Tremblay^3,4

¹Department of Psychology, University of Toronto, Toronto, Ontario, Canada.

Annals of the New York Academy of Sciences

|June 26, 2024

Summary

This summary is machine-generated.

Repeating speech syllables aloud enhances auditory speech perception in noise. This production-based priming improves phonological discrimination, offering potential benefits for older adults with hearing difficulties.

Keywords:

aging articulation speech motor speech perception speech production

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Area of Science:

Auditory perception
Speech motor control
Neuroscience of speech

Background:

Debate on shared neural resources between auditory and motor speech systems.
Understanding the speech production-perception relationship is crucial for speech processing.

Purpose of the Study:

To test if priming the speech motor system via syllable repetition improves speech discrimination in noise.
To investigate the persistence and specificity of this priming effect.

Main Methods:

Four experiments involving syllable repetition or discrimination tasks.
Comparison of auditory and visual priming modalities.
Inclusion of a 1-hour delay between priming and testing.
Testing in older adult populations.

Main Results:

Syllable repetition priming consistently improved syllable discrimination in noise compared to discrimination tasks.
Benefits were observed for both repeated and novel syllables, indicating enhanced phonological sensitivity.
Priming effects persisted after a delay, particularly for repeated syllables.
The approach was effective in older adults.

Conclusions:

Findings support a significant speech production-perception relationship.
Production-based interventions may improve speech perception, especially for older adults facing challenges in noisy environments.