The voiceless dental fricative is a type of consonant. The letter for this sound in the International Phonetic Alphabet is ⟨θ⟩. The X-SAMPA symbol for this sound is ⟨T⟩. The English language has this sound, and it is the sound represented by the "th" in thing and thanks.
Its phonation is voiceless. It means that we produce this sound without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
We produce it at dental. It means that we produce this sound with the tongue at the upper teeth, the lower teeth, or both the upper teeth and the lower teeth. (Many stops and liquids that we say it is dental consonants are actually denti-alveolar consonants.)
Its behavior is fricative. It means that we produce this sound by constricting air flow through a narrow channel at the place of articulation, to make turbulence.
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