Fricatives

Manx has an optional process of lenition of plosives between vowels, whereby voiced plosives and voiceless fricatives become voiced fricatives and voiceless plosives become either voiced plosives or voiced fricatives.

In the vast majority of those cases, the absence of voicing contrast occurs because there is a lack of voiced fricatives and because all languages have some form of plosive, but there are languages with no fricatives.

About 15 percent of the world's languages, however, have unpaired voiced fricatives, i.e. a voiced fricative without a voiceless counterpart.

Additionally, some other languages and variants, such as Haitian Creole and Timorese Portuguese use velar and glottal fricatives instead of traditional rhotics, too.

Affricates are quite common around the world, though less common than fricatives.

Affricates often behave as if they were intermediate between stops and fricatives, but phonetically they are sequences of a stop and fricative.

Akkadian lost both the glottal and pharyngeal fricatives, which are characteristic of the other Semitic languages.

An example of this relative spread can be seen in trying to explain why contrastive voicing commonly occurs with plosives, such as in English with “neat” and “need”, but much fewer have this occur in fricatives, such as the English “niece” and “knees”.

As a result, words in modern Vietnamese with voiced fricatives occur in all six tones, and the tonal register reflects the voicing of the minor-syllable prefix and not the voicing of the main-syllable stop in Proto-Viet–Muong that produced the fricative.

But they may also have become stops at first, softening to fricatives in most positions later.

By contrast, approximately 8.7% of the world's languages have no phonemic fricatives at all.

Consonants are also very similar to those of Balochi, but Brahui has more fricatives and nasals (Elfenbein 1993).

Early Old Thai also apparently had velar fricatives /x ɣ/ as distinct phonemes.

Elsewhere they are voiced, with a few becoming fricatives intervocalically.

For places of articulation further back in the mouth, languages do not contrast voiced fricatives and approximants.

For the pharyngeal, approximants are more numerous than fricatives.

Fricatives and affricates are the most difficult phonemes for apraxics to produce.

Further changes Once the changes described by Grimm's law had taken place, there was only one type of voiced consonant, with no distinction between voiced stops and voiced fricatives.

However, in all literature only the characters for palato-alveolar affricates and fricatives are used, even when the same sources use for other languages like Polish and Chinese. citation.

However, phonemically aspirated fricatives are rare.