Diplophonia in Mutational Falsetto : Acoustic Characteristics and Treatment -A Case Report-

Lee, Jae-Yol; Lee, Sung-Eun; Lee, Sung-Eun; Choi, Hong-Shik

J Korean Soc Laryngol Phoniatr Logop > Volume 15(1); 2004 > Article

Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 2004;15(1): 47-51.

이중음성을 보인 변성발성장애 환자 음성의 음향학적 특성 및 치험례 -증 례 보 고-

임재열, 임성은, 이성은, 최홍식

연세대학교 의과대학 이비인후과교실, 음성언어의학연구소

Diplophonia in Mutational Falsetto : Acoustic Characteristics and Treatment -A Case Report-

Jae-Yol Lee, Sung-Eun Lee, Sung-Eun Lee, Hong-Shik Choi

Department of Otorhinolaryngology, The Institute of Logopedics & Phoniatrics, Yonsei University College of Medicine

ABSTRACT

Normally, as a result of increased laryngeal growth, the male voice drops about one octave in pitch level during adolescence. Failure of the voice to drop in pitch is consider to be a clinically significant voice disorder - 'mutational dysphonia'. The aim of this article is to evaluate the changes brought about by voice therapy, using the analysis of the EGG measure from Lx Speech Studio program(Laryngograph Ltd, UK) as well as acoustic, and aerodynamic studies in 18-year-old mutational dysphonia patient. The results from the Lx Speech Studio program demonstrated bimodal distribution of DFx(Hz), DQx(%), QxFx and diplophonic characteristic. After voice therapy combined with manual compression method, the distribution of DFx, DQx, QxFx was changed uniform with a dramatic reduction of higher pitch level. In addition, this finding suggests the EGG measure helps to choice treatment options, monitor the efficacy of therapy, and estimate the prognosis of diseases.

KEY WORDS： Mutational falsetto;Diplophonia;Lz speech studio;EGG;