Vowel discrimination by hearing infants as a function of number of spectral channels

Andrea D. Warner-Czyz, Derek M. Houston, Linda S. Hynan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Reduced spectral resolution negatively impacts speech perception, particularly perception of vowels and consonant place. This study assessed impact of number of spectral channels on vowel discrimination by 6-month-old infants with normal hearing by comparing three listening conditions: Unprocessed speech, 32 channels, and 16 channels. Auditory stimuli (/ti/ and /ta/) were spectrally reduced using a noiseband vocoder and presented to infants with normal hearing via visual habituation. Results supported a significant effect of number of channels on vowel discrimination by 6-month-old infants. No differences emerged between unprocessed and 32-channel conditions in which infants looked longer during novel stimulus trials (i.e., discrimination). The 16-channel condition yielded a significantly different pattern: Infants demonstrated no significant difference in looking time to familiar vs novel stimulus trials, suggesting infants cannot discriminate /ti/ and /ta/ with only 16 channels. Results support effects of spectral resolution on vowel discrimination. Relative to published reports, young infants need more spectral detail than older children and adults to perceive spectrally degraded speech. Results have implications for development of perception by infants with hearing loss who receive auditory prostheses.

Original languageEnglish (US)
Pages (from-to)3017-3024
Number of pages8
JournalJournal of the Acoustical Society of America
Volume135
Issue number5
DOIs
StatePublished - 2014

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vowels
hearing
discrimination
spectral resolution
stimuli
auditory stimuli
auditory defects
Hearing
Discrimination
Spectrality

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Arts and Humanities (miscellaneous)

Cite this

Vowel discrimination by hearing infants as a function of number of spectral channels. / Warner-Czyz, Andrea D.; Houston, Derek M.; Hynan, Linda S.

In: Journal of the Acoustical Society of America, Vol. 135, No. 5, 2014, p. 3017-3024.

Research output: Contribution to journalArticle

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