Abstract:
OBJECTIVES:The ability of human listeners to identify consonants (presented as nonsense syllables) on the basis of primarily temporal information was compared with the predictions of a simple model based on the amplitude modulation spectra of the stimuli calculated for six octave-spaced carrier frequencies (250 to 8000 Hz) and six octave-spaced amplitude modulation frequencies (1 to 32 Hz). DESIGN:The listeners and the model were presented with 16 phonemes each spoken by four different talkers processed so that one, two, four, or eight bands of spectral information remained. The average modulation spectrum of each of the processed phonemes was extracted and similarity across phonemes was calculated by the use of a spectral correlation index (SCI). RESULTS:The similarity of the modulation spectra across phonemes as assessed by the spectral correlation index was a strong predictor of the confusions made by human listeners. CONCLUSIONS:This result suggests that a sparse set of time-averaged patterns of modulation energy can capture a meaningful aspect of the information listeners use to distinguish among speech signals.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Gallun F,Souza Pdoi
10.1097/AUD.0b013e31817e73efsubject
Has Abstractpub_date
2008-10-01 00:00:00pages
800-13issue
5eissn
0196-0202issn
1538-4667journal_volume
29pub_type
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