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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 identifying...

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.

The Cochlea

The Cochlea

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.

Auditory Pathway

Auditory Pathway

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.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...

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 cochlea, a...

Sound Intensity Level

Sound Intensity Level

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Related Experiment Video

Updated: Jun 5, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

Published on: February 19, 2014

Tonal hierarchy representations in auditory imagery.

Dominique T Vuvan¹, Mark A Schmuckler

¹University of Toronto Scarborough, Toronto, Canada. dominique.vuvan@utoronto.ca

Memory & Cognition

|January 26, 2011

Summary

Auditory imagery allows people to mentally represent musical scales, similar to how they perceive sound. However, major scales are imagined more clearly than minor scales.

Area of Science:

Cognitive Psychology
Music Psychology
Auditory Perception

Background:

Musical tonality involves hierarchical relationships between tones.
Auditory imagery is the mental representation of sounds.
Understanding how the brain processes musical structures in imagery is crucial.

Purpose of the Study:

To investigate the psychological representations of musical tonality in auditory imagery.
To compare auditory imagery with auditory perception.
To examine factors influencing the strength of tonal auditory images.

Main Methods:

Two experiments were conducted with musically trained participants.
Participants created auditory images of major and minor tonalities based on a perceptual cue.

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Mapping the After-effects of Theta Burst Stimulation on the Human Auditory Cortex with Functional Imaging

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fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals

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Judgments of probe tones were used to assess the accuracy of the imagined tonal hierarchies.

Main Results:

Participants successfully imaged both major and minor tonal hierarchies.
Auditory imagery of tonality functions similarly to auditory perception.
The strength of major tonal images depended on cue pitch and tonal relations.
Minor tonal images were less robust than major ones.

Conclusions:

Auditory imagery can accurately represent complex musical structures like tonal hierarchies.
The findings support the parallel between auditory imagery and perception.
Psychological representations of minor tonalities are less stable than major ones.