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Related Concept Videos

Perception of Sound Waves01:01

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 frequency...
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.
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...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
Somatosensation01:33

Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.

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Related Experiment Video

Updated: Jun 24, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Sound enhances touch perception.

Tony Ro1, Johanan Hsu, Nafi E Yasar

  • 1The City College of City University of New York, New York, NY, USA. tro@ccny.cuny.edu

Experimental Brain Research
|March 24, 2009
PubMed
Summary
This summary is machine-generated.

Auditory stimuli can enhance tactile perception. This study found that sounds increase sensitivity to touch, especially when spatially and frequency-matched, suggesting shared sensory processing mechanisms.

More Related Videos

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Related Experiment Videos

Last Updated: Jun 24, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Area of Science:

  • Neuroscience
  • Psychophysics
  • Sensory Integration

Background:

  • Auditory stimuli, like fingernails on a chalkboard, can evoke somatosensory percepts.
  • Understanding the interplay between different sensory modalities is crucial for mapping brain function.
  • The influence of audition on somatosensory perception requires systematic investigation.

Purpose of the Study:

  • To investigate how task-irrelevant auditory stimuli affect the detection of near-threshold somatosensory stimuli.
  • To determine if auditory influences on touch are spatially and frequency-specific.
  • To explore potential shared neural mechanisms for auditory and tactile processing.

Main Methods:

  • Three experiments were conducted using electrical cutaneous and vibrotactile stimuli delivered to the hand.
  • Participants detected somatosensory stimuli under conditions with simultaneous, task-irrelevant auditory stimuli.
  • Variations in sound location (monaural) and frequency were manipulated to assess specificity.

Main Results:

  • A simultaneous auditory stimulus significantly increased sensitivity to electrical cutaneous stimuli.
  • The enhancement of tactile detection was spatially specific, requiring monaural sounds on the same side of the body.
  • Auditory enhancement of tactile detection was frequency-dependent, with same-frequency sounds yielding the greatest effect.

Conclusions:

  • Auditory information significantly modulates tactile perception in a systematic and predictable manner.
  • The findings suggest that auditory and somatosensory systems may share underlying neural coding mechanisms.
  • This research highlights the complex integration of sensory information in the brain.