OBJECTIVE To investigate the effects of number of channels and speech-to-noise ratio on connected discourse tracking (CDT) through simulations of cochlear implant speech processing. Previous studies have used citation-form vowel and consonant materials or simple sentences. CDT rates were expected to be less likely to be limited by ceiling effects and more representative of everyday speech commu...

The purpose of this study is to characterize the intelligibility a corpus Vowel–Consonant–Vowel (VCV) stimuli recorded in five languages (English, French, German, Italian and Portuguese) order identify subset for screening individuals unknown language during speech-in-noise tests. VCV was estimated by combining psychometric functions derived from Short-Time Objective Intelligibility (STOI) meas...

Two experiments were conducted to test the hypothesis that listeners would modify perceptual strategies for phonetic identification if the spectrum of a speech signal was degraded. The contrasts between tense and lax vowels and between word-final s/z were selected because of the primacy of spectral cues and redundancy of temporal cues used in normal listening situations. In the first experiment...

This study investigated the relative contributions of consonants and vowels to the perceptual intelligibility of monosyllabic consonant-vowel-consonant (CVC) words. A noise replacement paradigm presented CVCs with only consonants or only vowels preserved. Results demonstrated no difference between overall word accuracy in these conditions; however, different error patterns were observed. A sign...

Spectral feature computations continue to be a very difficult problem for accurate machine recognition of vowels especially in the presence of noise or for otherwise degraded acoustic signals. In this work, a new peak envelope method for vowel classification is developed, based on a missing frequency components model of speech recognition. According to this model, vowel recognition depends only...

A new set of ‘‘Familiarity-controlled word lists 2003” (FW03) has been developed for a spoken-word intelligibility test in Japanese. FW03 consists of 20 lists of 50 words in four word-familiarity ranks (i.e., 4000 words in total). The entropy of (a) initial moras and (b) sequences consisting of a vowel and a following consonant was maximized in the word lists within each word-familiarity rank. ...

The influence of different sources of speech-intrinsic variation (speaking rate, effort, style and dialect or accent) on human speech perception was investigated. In listening experiments with 16 listeners, confusions of consonant-vowel-consonant (CVC) and vowel-consonant-vowel (VCV) sounds in speech-weighted noise were analyzed. Experiments were based on the OLLO logatome speech database, whic...

The posi tion of the category boundary along a synthetic [J J-[ sJ noise continuum depends on the following vocalic segment: When the vowel is [u], more "s" responses are given than when the vowel is [aJ. In Experiment I, we showed that this context effect disappears when the vocal ic portion is synthesized so as to contain no formant transitions. To dissociate the contribution of formant trans...