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In Old English, the phoneme /θ/, like all fricative phonemes in the language, had two allophones, one voiced and one voiceless, which were distributed regularly according to phonetic environment. [ð] (like [v] and [z]) was used between two voiced sounds (either vowels or voiced consonants).
The voiced dental fricative is a consonant sound used in some spoken languages.It is familiar to English-speakers as the th sound in father.Its symbol in the International Phonetic Alphabet is eth, or ð and was taken from the Old English and Icelandic letter eth, which could stand for either a voiced or unvoiced (inter)dental non-sibilant fricative.
The voiceless dental non-sibilant fricative is a type of consonantal sound used in some spoken languages.It is familiar to most English speakers as the 'th' in think.Though rather rare as a phoneme among the world's languages, it is encountered in some of the most widespread and influential ones.
There are several types (those used in English being written as th): Voiced dental fricative [ð] - as in the English this, [ðɪs]. [2] Voiceless dental fricative [θ] - as in the English thin, [θɪn]. [2] Dental ejective fricative [θʼ]
English also uses th to represent the voiced dental fricative /ð/, as in father. This unusual extension of the digraph to represent a voiced sound is caused by the fact that, in Old English, the sounds [θ] and [ð] stood in allophonic relationship to each other and so did not need to be rigorously distinguished in spelling.
The voiceless dental plosive can be distinguished with the underbridge diacritic, t̪ and the postalveolar with a retraction line, t̠ , and the Extensions to the IPA have a double underline diacritic which can be used to explicitly specify an alveolar pronunciation, t͇ . The [t] sound is a very common sound cross-linguistically. [1]
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.
In most Indigenous Australian languages, there is a series of "dental" consonants, written th, nh, and (in some languages) lh. They are always laminal (pronounced by touching with the blade of the tongue) but may be formed in one of three different ways, depending on the language, the speaker, and how carefully the speaker pronounces the sound.