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According to Paul Kiparsky, [2] Lachmann's law is an example of a sound law that affects deep phonological structure, not the surface result of phonological rules. 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').
All languages in the world have occlusives [2] and most have at least the voiceless stops [p], [t], [k] and the nasals [n], and [m].However, there are exceptions. Colloquial Samoan lacks the coronals [t] and [n], and several North American languages, such as the northern Iroquoian languages, lack the labials [p] and [m].
A stop consonant that is made with the body of the tongue in contact with the hard palate is called a palatal stop. Retroflex stops are less common than velar stops or alveolar stops and do not occur in English. They sound somewhat like the English alveolar stops [t] and [d], but they have a more hollow quality.
There are several problems with the traditional reconstruction. Firstly, the rarity of *b is odd from a typological point of view. If a single voiced stop is missing from a phoneme inventory (a 'gap'), it would normally be /ɡ/ that is missing (examples including Dutch, Ukrainian, Arabic, Thai, and Vietnamese); on the other hand, if a labial stop is missing, the voiceless /p/ is the most ...
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 ...
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.
It has no defined phonation, although it is typically voiceless, which means it is produced without vibrations of the vocal cords. Voiced epiglottal "stops" tend toward being epiglottal flaps. [citation needed] It is an oral consonant, which means air is allowed to escape through the mouth only.
[1] [4] In rapid and casual speech, prenasalisation is generally rarer, and voiced stops may be lenited to fricatives. [4] That also accounts for Greeks having trouble disambiguating voiced stops, nasalised voiced stops, and nasalised voiceless stops in borrowings and names from foreign languages such as, d , nd , and nt , which are all written ...