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Focuses on the voicing in speech sounds. Assessment of the acoustic and articulatory bases of the voiced-voiceless difference; Association of harmonic patterning and vocal fold vibration; Selection of the interval over voicing determining the phonetic unit described as voiced or voiceless.

Focuses on the importance of the voice onset time (VOT) in discussing the phonetic feature of stop voicing. Basis for separating homorganic stop categories across a variety of languages; Limitation of the VOT measure; Relation between burst and pulsing onset.

Examines the air pressure in the production of stops in English phrases. Variation in intra-oral pressure; Mean peak pressures of /p,t,k/ and /b,d,g/; Implication for the differences in the mean peak pressures.

The article presents an analysis of duration of periods and glottal articulation changes between the release of the word closure and voice onset time in English as considered in phonetics. For quotation type of words the stop closure is distinct, creating a greater time interval which helps distinguish the two phonemes clearly. In normal course of speech, the stop closure is not complete, leading to a smaller interval time and even overlapping along the dimension of voice onset time. In case of a stressed syllable or the syllables in final sentence, stress tends to create a longer voicing lag. The role of contextual features responsible for apparent overlap of dimension along the voice onset time in running speech needs to be explored further.

The article explores the discrimination of durations of silence with and without phonemic significance. Discrimination of an acoustic variable was measured when, as part of a synthetic speech pattern, that variable cued a phonemic distinction and when the same variable appeared in a non-speech context. With stimuli that vary along a single dimension like, of frequency, intensity, or duration, one typically finds that subjects discriminate many times more stimuli than they can identify absolutely.