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Related Concept Videos

Sound Waves01:01

Sound Waves

Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well. Hence,...
Sound as Pressure Waves01:17

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
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...
Sound Waves: Interference00:53

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
Sound Intensity00:58

Sound Intensity

The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the emitted...
Velocity of an Object01:18

Velocity of an Object

Understanding how an object moves along a path requires distinguishing between motion over a time span and motion at a precise moment. A useful example is a vehicle traveling along a straight and level path, where its position at any given time is known. The initial step in analyzing this motion is to measure how far the vehicle travels over a fixed time period. This measurement, called average velocity, is computed by dividing the total change in position by the duration over which the change...

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Related Experiment Video

Updated: Jun 9, 2026

Measuring the Switch Cost of Smartphone Use While Walking
07:00

Measuring the Switch Cost of Smartphone Use While Walking

Published on: April 30, 2020

Sounds move a static visual object.

Wataru Teramoto1, Souta Hidaka, Yoichi Sugita

  • 1Department of Psychology, Graduate School of Arts and Letters, Tohoku University, Sendai, Miyagi, Japan.

Plos One
|September 3, 2010
PubMed
Summary

Auditory stimuli can create illusory visual motion. Sounds, even without motion cues, can trigger the perception of movement in static visual objects after a brief association period.

Area of Science:

  • Neuroscience
  • Auditory-Visual Integration
  • Perceptual Psychology

Background:

  • Vision is primary for motion perception, but audition also influences it.
  • This study investigates how non-motion auditory cues affect visual motion perception.

Purpose of the Study:

  • To demonstrate that sounds without motion cues can induce illusory visual motion.
  • To explore the formation and duration of sound-induced illusory visual motion.

Main Methods:

  • Paired presentation of alternating visual stimuli (circles) with unique tone bursts.
  • Assessing illusory motion perception when tones were presented alone after association.
  • Examining the duration and location specificity of the induced illusory motion.

More Related Videos

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Related Experiment Videos

Last Updated: Jun 9, 2026

Measuring the Switch Cost of Smartphone Use While Walking
07:00

Measuring the Switch Cost of Smartphone Use While Walking

Published on: April 30, 2020

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Main Results:

  • Brief exposure to tones paired with apparent visual motion led to tones driving illusory motion.
  • Static visual objects were perceived as moving in the direction of prior apparent motion.
  • The induced illusory motion effect persisted for several days and was retinotopically specific.

Conclusions:

  • A strong association between sound sequences and visual motion forms rapidly.
  • Sounds can trigger visual motion perception for static objects post-association.
  • Highlights the brain's plasticity in cross-modal sensory integration.