Top-down influences in perception with spectrally degraded resynthesized natural speech
Jane Smart, Stefan A. Frisch · The Journal of the Acoustical Society of America · 2015
Lexical processes can influence perception of ambiguous phonemes (e.g., Ganong, 1980). To date, research has focused on these influences in quiet conditions with stimuli that have not been degraded. This project examines the interplay between lexical and acoustic information in speech perception, with stimuli in non-degraded and spectrally degraded conditions. Continua of /t, k/ onsets were developed by wavelet resynthesis of natural speech using TandemSTRAIGHT software, concatenated to the vowel × coda portion of words/nonwords, and distorted using AngelSim (TigerCIS) vocoding software. Normal hearing adult participants identified the onset phonemes in non-degraded and spectrally degraded conditions. Identification functions and the effects of lexical status in phoneme perception with spectrally degraded stimuli will be discussed.