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A lisp, also known as sigmatism, is a speech impediment in which a person misarticulates sibilants (, , , ), (, , , ). These misarticulations often result in unclear speech. ==Types== * A frontal lisp occurs when the tongue is placed anterior of the target. Interdental lisping is produced when the tip of the tongue protrudes between the front teeth and dentalised lisping is produced when the tip of the tongue just touches the front teeth. The transcription in the International Phonetic Alphabet for interdental sibilants is and and for simple dental sibilants is and . When a fronted lisp does not have a sibilant quality, due to placing the lack of a grooved articulation, the IPA transcription would be or variants thereof. * A is where the and sounds are produced with air-flow over the sides of the tongue. It is also called 'slushy ess' or a 'slushy lisp' due to its wet, spitty sound. The symbols for these lateralised sounds in the extensions to the International Phonetic Alphabet for disordered speech are and . * A occurs when part or the entire air stream is directed through the nasal cavity. The transcription for sibilants with nasal frication in the extensions to the IPA is and ; simple nasal fricatives are and . * A strident lisp results in a high-frequency whistle of hissing sound caused by stream passing between the tongue and the hard surface. In the extensions to the IPA, whistled sibilants are transcribed and . * A palatal lisp is where the speaker attempts to make a sibilant while the middle of the tongue is in contact with the soft palate,〔 or with a posterior articulation of the sibilant. The later may be transcribed and , and , or the like.〔John Reisman (1986) ''Behavior Disorders in Infants, Children, and Adolescents''〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lisp」の詳細全文を読む スポンサード リンク
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