器质性喉病假声消失机制的初步探讨

The Falsetto Loss Mechanism of Organic Laryngeal Disease

人类声音从生理上分为胸声和假声二类。胸声音色丰满宏亮，普通言语的音域范围在胸声段。假声有人称为头声、假嗓，其音色薄而高，位于音域的顶段。普通话声不能反映出假声异常，不易引起人们的注意，故长期为医学界所忽略。本文对４０名正常人和４３名器质性喉病患者进行喉功能检查，发现假声是病态嗓音中较敏感的参数。本文对假声改变的机制进行了初步探讨。

There are two tone qualities in the human being,that is chest voice and falsetto.The chest timbre is louder,the falsetto timbre is thinner,weaker,and higher.The falsetto is usually used in song or artistic voice,ordinary conversational sound belongs to chest voice。During the falsetto phonation bilateral vocal cords are strained and tension of it increased but only the cord edges are vibrated.The falsetto frequency is sited in higher register.Because the falsetto variation is not easily shown in speaking voice,the falsetto dysphonia has been neglected a long time.In this paper,the laryngeal function of healthy 40 volunteers and 43 patients with laryngeal disorder were investigated.The results indicated that falsetto dysphonia was relative to morphological and structural change of vocal cords.