Slit

狭口音

A term used by some phoneticians to refer to a type of fricative where air is released over the surface of the articulators through a narrow, horizontal opening; also called flat. Such fricatives (e.g. [f], [θ], [c]) are contrasted with groove fricatives, where a hollowing of the active articulator is involved (e.g. [s], [ʃ]).

有的语音学家用来指一类擦音，空气在发音器表面通过一条狭窄的水平开口除阻；也称作窄口音。这类擦音（例如[f]，[θ]，[c]）与舌沟擦音对立，后者发音时主动发音器形成一条凹沟（例如[s]，[ʃ]）。