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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.
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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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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.
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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.
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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.
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Structure, Movement, Sound, and Perception.

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  • 1Speech, Language, and Hearing Sciences, University of Arizona.

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Artificial talker models simulate human speech production and perception. A new airway modulation model aids in studying vocal tract changes and sound generation for listener perception.

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Area of Science:

  • Speech Science
  • Acoustic Phonetics
  • Computational Linguistics

Background:

  • Artificial talkers and speech synthesis have historically aided speech production and perception research.
  • Early artificial speaking devices represented speech production as modulation systems.

Purpose of the Study:

  • To describe the development of a novel airway modulation model.
  • To create an artificial talker for studying human speech generation and perception.

Main Methods:

  • Review of historical artificial speaking devices.
  • Development of a computational model simulating vocal tract dynamics.
  • Simulation of acoustic wave propagation.

Main Results:

  • An artificial talker capable of simulating time-varying vocal tract changes.
  • The model effectively represents speech production as a system of modulations.
  • The artificial talker provides a platform for perceptual studies.

Conclusions:

  • The developed airway modulation model advances the creation of artificial talkers.
  • This artificial talker serves as a valuable tool for investigating speech production and perception mechanisms.