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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.
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...
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...

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Related Experiment Video

Updated: May 30, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
07:14

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Published on: October 29, 2018

Auditory N1 as a change-related automatic response.

Makoto Nishihara1, Koji Inui, Eishi Motomura

  • 1Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki 444-8585, Japan. nisihara@aichi-med-u.ac.jp

Neuroscience Research
|July 27, 2011
PubMed
Summary
This summary is machine-generated.

The N1 component of auditory evoked potentials (AEPs) is a change-related response. Both "Change-N1" and "On-N1" responses are elicited by sound pressure changes, supporting their role in detecting auditory alterations.

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Sensory Perception

Background:

  • Auditory evoked potentials (AEPs) provide insights into auditory processing.
  • The N1 component is a prominent feature of AEPs, but its precise role in response to sound changes is debated.

Purpose of the Study:

  • To investigate whether the N1 component of AEPs reflects a change-related response to abrupt sound pressure variations.
  • To differentiate between responses elicited by sound changes versus sustained sounds.

Main Methods:

  • Two AEP experiments were conducted: one evoking "Change-N1" with a test stimulus after a conditioning stimulus, and another evoking "On-N1" with the test sound alone.
  • Stimulus parameters, including sound pressure levels and physical differences, were systematically varied.

Main Results:

  • Increasing the physical difference between stimuli led to increased amplitude and shortened latency for Change-N1.
  • The On-N1 response exhibited similar amplitude and latency patterns to Change-N1.
  • These findings suggest a shared underlying mechanism for both responses.

Conclusions:

  • The results support the hypothesis that the N1 component of AEPs is a change-related response.
  • Both Change-N1 and On-N1 appear to be elicited by sound pressure changes, indicating their significance in auditory change detection.