Establishiment of clinical index for treatment of speech development

2004 Fiscal Year Final Research Report Summary

• Project/Area Number: 15500395
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Osaka Medical College
• Principal Investigator: THKAMAKI Atsuko Osaka Medical College, Faculty of Medicine, Research Associate, 医学部, 助手 (40368105)
• Project Period (FY): 2003 – 2004
• Keywords: Sneech development / Acoustical analysis / Bilabial plosives / Word list for articulatory disorders

Research Abstract

There are many parameters of the index for speech development In Japanese, only a few parameters of the index are used in dinical diagnosis and treatment of speech developmental disorders. It is need to establish the standard index for treatment of speech developmental disorders. First of all, we have to know the speech development in normal children. Among m any parameters, we aimed to reveal the transition of acoustical features of words in each age of children.
Using the word list for articulatory disorders, we collected seven samples : /panda/, /basω/, /kaη i/, /ke : ki/, /sakana/, /rappa/, /a∫ i /, which contain bilabial stops. Subjects were 8 Japanese children 3 of aged in 2 yrs, 1 of 3 yrs, 3 of 5 yrs, and 1 of 6yrs. They had no histories of speech, language, or hearing proeblems and of development or neurological disorders. In this period, we examined two parameters : FI1/F2 ratio at 50 milliseconds after plosives (F1/F2) and formant transition after 50 milliseconds after plosives (FT).
There was no change of F1/F2 in each age group. The larger amplitude of FT was observed in higher aged group. It may be suggested that the amplitude of FT relate to speech development
We have some projects after this study : to select the word whose generality is high to make a sample easy to collect, and providing the diagnosis on the Internet through our homepage.