English monolinguals and native Spanish speakers of English used a 9-point scale to rate syllable-initial stops for goodness as realizations of the English /p/ category. Voice onset time (VOT) was varied in a set of short-duration ('fast-rate') consonant-vowel (CV) stimuli, and in a set of longer-duration ('slow-rate') CV stimuli. The VOT values ranged from values typical for English /b/ to val...

This research examines the trading correlation between VOT and F0 in the production and perception of the three-way distinction of Korean stops and affricates, namely, lenis, aspirated, and fortis, in the word-initial position. For this research, I conducted production and perception tests. For the production test, two female and two male native speakers of Seoul Korean recorded a monosyllabic ...

Voice-onset time (VOT) and syllable duration were measured for the English plosives in /Cad/(C = consonant) context spoken by four postlingually deafened recipients of multichannel (Ineraid) cochlear implants. Recordings were made of their speech before, and at intervals following, activation of the speech processors of their implants. Three patients reduced mean syllable duration following act...

This study investigated the significant acoustic cues used in the perception of aspiration contrast in Cantonese initial stops by normal hearing adults. The effects of vowel characteristics, aspiration noise level and voice-onset time (VOT) duration on aspiration perception in Cantonese initial stops were studied. The stimuli were consonant-vowel (CV) real words recorded by a male Cantonese nat...

We describe an algorithm to automatically estimate the voice onset time (VOT) of plosives. The VOT is the time delay between the burst onset and the start of periodicity when it is followed by a voiced sound. Since the VOT is affected by factors like place of articulation and voicing it can be used for inference of these factors. The algorithm uses the reassignment spectrum of the speech signal...

The proposal that phonological contrast is enhanced through greater approximation of phonetic targets was investigated by comparing clear speech to conversational and citation-form speech produced by Korean speakers. The stop system of Korean is undergoing a sound change in which younger speakers produce the aspirated-lenis stop contrast differently from previous generations. Older speakers dif...

Event-related magnetic fields (ERFs) were recorded from the left hemisphere in nine normal volunteers in response to four consonant-vowel (CV) syllables varying in voice-onset time (VOT). CVs with VOT values of 0 and +20 ms were perceived as /ga/ and those with VOT values of +40 and +60 ms as /ka/. Results showed: (1) a displacement of the N1m peak equivalent current dipole toward more medial l...

This study investigated how English learners of Korean weigh multiple acoustic cues, namely VOT and f0, in perceiving the Korean stop laryngeal contrast. This question is of interest because VOT is more central to this contrast in English relative to Korean. Our goal was to examine whether L2 cueweighting strategies were influenced by individual differences in cue-weighting strategies in L1 and...

Here we show that hearing loss associated with an impairment of speech recognition causes a decrease in neural temporal resolution. In order to assess central auditory system changes in temporal resolution, we investigated the effect of an acute hearing loss on the representation of a voice onset time (VOT) and gap-duration continuum in primary auditory cortex (AI) of the ketamine-anesthetized ...

Signal processing in current days is under studying. One of these studies focuses on speech processing. Speech signal have many important features. One of them is Voice Onset Time (VOT). This feature only appears in stop sounds. The human auditory system can utilize the VOT to differentiate between voiced and unvoiced stops like /p/ and /b/ in the English language. By VOT feature we can classif...