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Related Experiment Videos

Age differences in identifying words in synthetic speech.

Roy W Roring1, Franklin G Hines, Neil Charness

  • 1Psychology Department, Florida State University, Tallahassee, FL 32306-1270, USA. roring@psy.fsu.edu

Human Factors
|February 24, 2007
PubMed
Summary
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Context aids natural speech but not synthetic speech for older adults. Slower speech rates negatively impact word identification across all age groups, highlighting the need for improved synthetic speech technology.

Area of Science:

  • Speech processing
  • Human-computer interaction
  • Gerontology

Background:

  • Synthetic speech (text-to-speech) offers potential benefits for older adults.
  • Limited research exists on older adults' ability to use current text-to-speech technologies.
  • Age-related sensory and cognitive changes may hinder synthetic word identification.

Purpose of the Study:

  • To determine if context or slower speech rates enhance older adults' identification of synthetic words.
  • To investigate age-related differences in synthetic speech perception.

Main Methods:

  • 96 participants (young, middle-aged, older adults) identified monosyllabic words.
  • Words were presented in isolation or within sentences (context).
  • Speech was delivered at normal or slower rates, in natural or synthetic voices.

Related Experiment Videos

Main Results:

  • An interaction was found between age, context, and voice type.
  • Slower speech rates impaired performance for all age groups.
  • Context reduced age differences in natural speech but not synthetic speech.

Conclusions:

  • Context benefits natural speech perception across ages.
  • Context improves synthetic speech perception but doesn't eliminate age-related deficits.
  • Slower speech rates generally degrade performance; synthetic speech requires significant fidelity improvements for older adults.