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Related Concept Videos

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.
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.
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...
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...
Auditory Perception01:17

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...

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Related Experiment Video

Updated: May 24, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
10:50

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

Published on: February 19, 2014

Neurons in the bat auditory cortex encode class and complexity of future vocalizations.

Susanne S Babl1,2,3, Dennis Röhrig4, Julio C Hechavarría5,6,7

  • 1AG Brain & Behavior, Institute of Biology, Freie Universität Berlin, Berlin, Germany. s.babl@fu-berlin.de.

Communications Biology
|May 22, 2026
PubMed
Summary
This summary is machine-generated.

Neurons in the auditory cortex predict vocalizations before they are produced. This finding reveals a previously unknown role for auditory processing areas in vocal motor control.

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Auditory Processing

Background:

  • Vocal production involves complex motor and auditory networks.
  • The role of sensory areas, like the auditory cortex, in vocal control is not well understood.

Purpose of the Study:

  • Investigate vocalization-related neural activity in the auditory cortex.
  • Determine if the auditory cortex encodes information about future vocalizations.

Main Methods:

  • Recorded neuronal spike rates in the auditory cortex of bats (Carollia perspicillata).
  • Analyzed neural activity patterns related to echolocation and communication calls.

Main Results:

  • Distinct neural firing patterns were observed hundreds of milliseconds before vocalization onset.
  • Auditory cortex activity encoded vocalization category and temporal complexity (syllable amount).
  • These patterns were dependent on the neurons' frequency receptive fields.

Conclusions:

  • Single neurons in the auditory cortex process acoustic information and encode future vocal output.
  • The auditory cortex plays a role in vocal motor control beyond auditory processing.