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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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Auditory Perception01:17

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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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Perceiving Loudness, Pitch, and Location01:21

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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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Perceptual Constancy01:12

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
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Perception01:28

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Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
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Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
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Related Experiment Video

Updated: Jan 7, 2026

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How Perceptual Learning Extends Across Vowels.

Chelsea Sanker1

  • 1Wellesley College, USA.

Language and Speech
|January 2, 2026
PubMed
Summary

Perceptual learning of speech sounds can shift how we hear vowels, extending to unexposed sounds based on acoustic similarity or shared phonological features. Listener dialect had minimal impact on these perceptual shifts.

Area of Science:

  • Phonetics and Phonology
  • Auditory Perception
  • Psychoacoustics

Background:

  • Speech perception is adaptable; exposure to altered speech sounds can shift phoneme boundaries.
  • These perceptual shifts can extend to phonemes not directly experienced during exposure, suggesting underlying learning mechanisms.
  • Understanding extension patterns clarifies vowel representation and acoustic shift processes.

Purpose of the Study:

  • To investigate how exposure to shifted acoustic characteristics (F1 or F2) in one American English vowel influences perception of other vowels.
  • To determine if extension patterns are driven by phonological features or acoustic similarity.
  • To examine the role of listener dialect in modulating these perceptual extension patterns.

Main Methods:

  • Three perceptual learning experiments using American English vowels.
Keywords:
Perceptual learningperceptionvowel featuresvowel space

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  • Exposure to vowels with manipulated first (F1) or second (F2) formant frequencies.
  • Assessment of perceptual shifts in vowel boundaries and their extension to unexposed vowels.

    • Main Results:

    • Shifted F1 in /ɪ/ affected high-mid and /ε-æ/ vowel boundaries.
    • Shifted F2 in /u/ influenced front-back vowel boundaries.
    • Shifted F2 in /ε/ or /ei/ showed distinct extension patterns, primarily linked to phonological features and acoustic similarity, with minimal dialect influence.

    Conclusions:

    • Perceptual shifts extend to phonemes sharing phonological features with the exposed vowel or exhibiting acoustic similarity.
    • Acoustic similarity appears to be a significant factor in the extension of perceptual learning.
    • Listener dialect does not substantially alter the patterns of perceptual extension observed in this study.