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The concept of voice onset time can be traced back as far as the 19th century, when Adjarian (1899: 119) [1] studied the Armenian stops, and characterized them by "the relation that exists between two moments: the one when the consonant bursts when the air is released out of the mouth, or explosion, and the one when the larynx starts vibrating".
Speech sounds can be described as either voiceless (otherwise known as unvoiced) or voiced. The term, however, is used to refer to two separate concepts: Voicing can refer to the articulatory process in which the vocal folds vibrate, its primary use in phonetics to describe phones , which are particular speech sounds.
Voiceless stops are allophonically aspirated under most conditions. Voiced stops become unaspirated voiceless stops. All aspirated stops become fricatives. This sequence would lead to the same result. This variety of Grimm's law is often suggested in the context of Proto-Indo-European glottalic theory, which is followed by a minority of linguists.
This excludes all natural classes of sounds besides voiceless stops. For instance, it excludes voiceless fricatives, which have the feature [+continuant], voiced stops, which have the feature [+voice], and liquids and vowels, which have the features [+continuant] and [+voice]. Voiceless stops also have other, redundant, features, such as ...
In Geordie, these stops may be fully voiced ([b], [d], [ɡ]) in intervocalic position. [2] In Devon, stops and other obstruents may be voiced (or at least lenited) between vowels and when final after a weak vowel, so for example the /k/ and /t/ in jacket may approach the realizations [ɡ] and [d], making the word sound similar or identical to ...
Flapping or tapping, also known as alveolar flapping, intervocalic flapping, or t-voicing, is a phonological process involving a voiced alveolar tap or flap; it is found in many varieties of English, especially North American, Cardiff, Ulster, Australian and New Zealand English, where the voiceless alveolar stop consonant phoneme /t/ is pronounced as a voiced alveolar flap [ɾ], a sound ...
If the "plain voiced stops" were not voiced, the "voiced aspirated stops" were the only voiced stops. The second constraint can accordingly be reformulated as: two nonglottalic stops must agree in voicing. Since the glottalic stops were outside the voiced/voiceless opposition, they were immune from the constraint on voicing agreement in (2).
Voiceless stops are unaspirated and with a very short voice onset time. [1] They may be lightly voiced in rapid speech, especially when intervocalic. [3] /t/ 's exact place of articulation ranges from alveolar to denti-alveolar, to dental. [4] It may be fricated [θ̠ ~ θ] in rapid speech, and very rarely, in function words, it is deleted.