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Related Concept Videos

Perceiving Loudness, Pitch, and Location01:21

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...
Hearing01:31

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 Cochlea01:13

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 Pathway01:15

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...
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Hair Cells01:22

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Related Experiment Video

Updated: May 8, 2026

Mapping the After-effects of Theta Burst Stimulation on the Human Auditory Cortex with Functional Imaging
10:09

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

Published on: September 12, 2012

Pitch coding and pitch processing in the human brain.

Christopher J Plack1, Daphne Barker, Deborah A Hall

  • 1School of Psychological Sciences, The University of Manchester, Manchester M13 9PL, UK.

Hearing Research
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

Neuroimaging reveals how the brain processes pitch. The frequency-following response (FFR) in the brainstem converts temporal pitch cues into firing rates, with auditory cortex integrating these for a unified pitch perception.

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Area of Science:

  • Auditory Neuroscience
  • Human Neuroimaging
  • Psychoacoustics

Background:

  • Neuroimaging studies investigate pitch coding and processing in the human brain.
  • The frequency-following response (FFR) measures neural temporal coding in the brainstem.
  • FFR precision is influenced by linguistic/musical experience and training.

Purpose of the Study:

  • To explore how peripheral neural signals are processed into a unified pitch sensation.
  • To identify brain regions involved in pitch perception, particularly in the auditory cortex.
  • To understand the conversion of temporal pitch codes to neural firing rate codes.

Main Methods:

  • Analysis of neuroimaging data from human auditory studies.
  • Electrophysiological recordings of the frequency-following response (FFR).
  • Review of evidence for pitch sensitivity in auditory cortex areas.

Main Results:

  • FFR indicates temporal pitch coding in the brainstem, modifiable by experience.
  • Evidence suggests auditory cortex areas are sensitive to pitch perception.
  • A conversion from temporal pitch codes to neural firing rate codes occurs in the brainstem.

Conclusions:

  • The brainstem converts initial temporal pitch information into a neural firing rate code.
  • Auditory cortex integrates harmonic information for a generalized pitch representation.
  • The precise neural locus of pitch extraction remains an active area of research.