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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...
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...
Sound Intensity Level00:53

Sound Intensity Level

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...
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...
Echo01:06

Echo

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, then the...
Factors Affecting Perception01:25

Factors Affecting Perception

Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...

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Related Experiment Video

Updated: May 25, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
09:09

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Relationship between speech rate perceived and produced by the listener.

Sandra Schwab1

  • 1Ecole de Langue et de Civilisation Françaises, Université de Genève, Genève, Switzerland. sandra.schwab@unige.ch

Phonetica
|January 31, 2012
PubMed
Summary

Listeners

Area of Science:

  • Psycholinguistics
  • Speech Perception
  • Acoustic Phonetics

Background:

  • Speech rate perception is influenced by various factors.
  • Individual differences in speech production may affect auditory perception.
  • Understanding listener-specific effects is crucial for accurate speech processing models.

Purpose of the Study:

  • To investigate how a listener's own speech production rate influences their perception of others' speech rates.
  • To determine if a listener's vocal tempo acts as a reference point in speech rate judgment.

Main Methods:

  • 28 native French speakers recorded passages at normal, fast, and slow rates.
  • Participants performed a magnitude estimation task to rate speech samples.
  • Listener speech rates were correlated with their perceptual judgments of recorded samples.

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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

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Main Results:

  • An inverse relationship was found: slower speakers overestimated sample rates, while faster speakers underestimated them.
  • This listener rate effect was significant for slow and normal speech samples, but not for fast samples.
  • Slower listeners demonstrated heightened sensitivity to rate variations within each category.

Conclusions:

  • A listener's own speech production rate is a critical, previously underestimated factor in speech rate perception.
  • Listener-specific vocal tempo influences how speech rate is judged, particularly at slower and normal speeds.
  • Future research should incorporate listener production characteristics into models of speech perception.