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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".
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 ...
English voiceless stops are generally aspirated at the beginning of a stressed syllable, and in the same context, their voiced counterparts are voiced only partway through. In more narrow phonetic transcription , the voiced symbols are maybe used only to represent the presence of articulatory voicing, and aspiration is represented with a ...
Voiceless stops and affricates /p, t, k, tʃ/ are longer than their voiced counterparts /b, d, ɡ, dʒ/ when situated at the end of a syllable. Try comparing "cap" to "cab" or "back" to "bag". When a stop comes before another stop, the explosion of air only follows after the second stop, illustrated in words like "apt" [æp̚t] and "rubbed ...
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.
The alveolar and dental ejective stops are types of consonantal sounds, usually described as voiceless, that are pronounced with a glottalic egressive airstream. In the International Phonetic Alphabet , ejectives are indicated with a "modifier letter apostrophe" ʼ , [ 1 ] as in this article.
In Proto-Indo-European, a voiced stop was already pronounced as voiceless before voiceless stops, as the assimilation by voicedness must have been operational in PIE (*h₂eǵtos → *h₂eḱtos 'forced, made').