Frequency-weighting functions for broadband speech as estimated by a correlational method

Christopher W. Turner, Bom Jun Kwon, Chiemi Tanaka, Jennifer Knapp, Jodi L. Hubbartt, Karen A. Doherty

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

The relative contributions of various regions of the frequency spectrum to speech recognition were assessed with a correlational method [K. A. Doherty and C. W. Turner, J. Acoust. Sec. Am. 100, 3769-3773 (1996)]. The speech materials employed were the 258-item set of the Nonsense Syllable Test. The speech was filtered into four frequency bands and a random level of noise was added to each band on each trial. A point biserial correlation was computed between the signal-to-noise ratio in each band on the trials and the listener's responses, and these correlations were then taken as estimates of the relative weights for each frequency band. When the four bands were presented separately, the correlations for each band were approximately equal; however:, when the four bands were presented in combination, the correlations were quite different from one another, implying that in the broadband case listeners relied much more on some bands than on others. It is hypothesized that these differences reflect the way in which listeners combine and attend to speech information across various frequency regions. The frequency-weighting functions as determined by this method were highly similar across all subjects, suggesting that normal-hearing listeners use similar frequency-weighting strategies in recognizing speech.

Original languageEnglish (US)
Pages (from-to)1580-1585
Number of pages6
JournalJournal of the Acoustical Society of America
Volume104
Issue number3 I
DOIs
StatePublished - Sep 1 1998

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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