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Related Concept Videos

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...
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...
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.
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...
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...

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Related Experiment Video

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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Vibrotactile--auditory interactions are post-perceptual.

Kielan Yarrow1, Patrick Haggard, John C Rothwell

  • 1Department of Psychology, Social Science Building, City University, Northampton Square, London, UK. kielan.yarrow.1@city.ac.uk

Perception
|September 9, 2008
PubMed
Summary
This summary is machine-generated.

Vibrotactile stimuli can enhance perceived loudness of auditory tones, even at low sound levels. This cross-modal interaction suggests tactile information is not always integrated at early auditory processing stages.

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Area of Science:

  • Neuroscience
  • Auditory Perception
  • Cross-modal Interactions

Background:

  • Vibrotactile stimuli can evoke auditory sensations, even with minimal sound energy.
  • Previous research indicates vibrotactile stimuli increase perceived loudness of auditory tones at the same frequency.

Purpose of the Study:

  • To replicate and extend previous findings on the loudness enhancement of auditory tones by vibrotactile stimuli.
  • To investigate the perceptual level at which vibrotactile and auditory stimuli interact.

Main Methods:

  • Experiment 1 replicated previous findings across four auditory stimulation levels (no tone, threshold, +5 dB, +10 dB).
  • Experiments 2 and 3 used a 2-interval forced-choice procedure to assess the nature of the cross-modal interaction.

Main Results:

  • Vibrotactile stimuli increased perceived loudness in three of four tested auditory levels.
  • Subject performance was biased when vibrotactile stimuli were presented in only one interval.
  • Performance was comparable to no-stimulus conditions when vibrotactile stimuli were presented in both intervals.

Conclusions:

  • The enhancing effect of vibrotactile stimuli on auditory loudness perception is confirmed.
  • The interaction between vibrotactile and auditory stimuli does not appear to occur at an early perceptual level, as subjects can ignore tactile input.
  • This suggests a later stage of integration or modulation in cross-modal processing.