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Related Concept Videos

Perception of Sound Waves01:01

Perception of Sound Waves

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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...
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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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...
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Echo01:06

Echo

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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
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Auditory Perception01:17

Auditory Perception

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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...
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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Auditory Pathway01:15

Auditory Pathway

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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...
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Effects of type of emission and masking sound, and their spatial correspondence, on blind and sighted people's ability to echolocate.

Neuropsychologia·2024
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Human Echolocators Have Better Localization Off Axis.

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Increased emission intensity can compensate for the presence of noise in human click-based echolocation.

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Human Echolocation for Target Detection Is More Accurate With Emissions Containing Higher Spectral Frequencies, and This Is Explained by Echo Intensity.

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Human echolocators adjust loudness and number of clicks for detection of reflectors at various azimuth angles.

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Related Experiment Video

Updated: Dec 30, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind
09:01

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

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Navigation and perception of spatial layout in virtual echo-acoustic space.

C Dodsworth1, L J Norman1, L Thaler1

  • 1Department of Psychology, Durham University, Durham DH1 3LE, UK.

Cognition
|January 18, 2020
PubMed
Summary

Sighted individuals improved navigation skills using virtual echolocation, generalizing to new environments. This training enhanced spatial perception and orientation, demonstrating navigation is a versatile skill achievable through various sensory inputs.

Keywords:
AuditionBlindnessLearningNeuroplasticitySonarTraining

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Human Navigation

Background:

  • Navigation relies on spatial awareness and route planning.
  • Previous studies explored non-visual navigation but generalization remains unclear.
  • Collision avoidance in navigation needs separate investigation from spatial perception.

Purpose of the Study:

  • To investigate the generalization of learned non-visual navigational abilities to new environments.
  • To assess the distinct ability of collision avoidance in navigation.
  • To explore the use of virtual echolocation for navigation training in sighted individuals.

Main Methods:

  • A virtual echolocation paradigm was used with 14 sighted, blindfolded participants.
  • Participants underwent 10 weeks of virtual navigation training.
  • Spatial layout perception and navigation performance were assessed before and after training.

Main Results:

  • Navigation skills significantly improved, with reduced collisions and completion time.
  • Improved navigation generalized to untrained virtual environments.
  • Spatial layout perception and orientation abilities were enhanced post-training.

Conclusions:

  • Learned echolocation-based navigation skills generalize to novel environments.
  • Virtual echolocation training fosters true sensory-driven navigational abilities.
  • Navigation is a modality-independent skill, achievable through sensory substitution like echolocation.