The Establishment Of Norms And Clinical Use Reasearch On Acoustic Scale Of Phonation For Deaf Children (ASP)

With the progress of civilization and economy of our society, the career of Chinese rehabilitation for deaf children develops rapidly. The phenomenon of so-called "nine of ten deaf children are mute" has changed radically. Nevertheless, because of the limit of hearing aid and electrical cochlear , compared with the real cochlear, there may be some abnormalities with the phonetic perception and production of deaf children. Therefore, This article aims at setting down the norms of Acoustic Scale of Phonation for Deaf children (ASP), exploring the ways of objective and effective evaluation for phonation disorder of deaf children, and making good use of proper parameter to monitor the curative effect.The characteristic of ASP studied out in this thesis lies in acquiring the objective data measured through RA, and comparing with the criteria-reference, then diagnosing whether the phonation disorder is existed. So this research is carried out from three aspects: firstly, Acoustic Scale of Phonation for Deaf Children (ASP) is studied out on the basis of theory analysis; secondly, to establish the norms of every parameter in ASP through the experiment devised by this study(MPT, MCA, MSF, and F1,F2, â–³A), mainly the resonance parameters. Lastly, to apply ASP to the clinic work of phonation therapy for deaf children, embodying the clinic significance of ASP, such as the case analysis in this study which represent the monitoring function of MSF and SD in ASP for pitch therapy.This study focus on the establishment of norms of every parameter in ASP, espically the resonance parameters after having finished theeatablishment of norms of MPT, MCA and MSF, such as norms of F1, F2, AA of/a/, /i/, /u/ concerning the normal children aged 3-6. The study has found that with the growing up , MPT and MCA increase gradually(p<0.05) , MSF, absolute formants values of the vowels generally decease (p<0. 05), for MPT and MSF, their key growing periods are all age 4-7 and age 12-14. There are significant difference between formants of /aA /iA /u/ (p<0. 01), MSFn the formants of female children are basically higher than male children; furthermore, the study found that F1 of /i/, F1,F2 and AA of /u/ have significantly affected by the factor of age(p<0.05) , F1, F2 of /a/ and F2, AA of /i/ have significant difference on the gender (p<0. 05) . So, we should continue establishing the norms of formants according to the gender and age. The experiment further discovered that the relative formants (F2/F1) of /aA /u/ except /i/ have no significant variance following the change of age and gender(p>0.05), embodying the characteristic of identity on vowel timber. Because of the limit of age groups in this experiment ,these results will further be testified on the experiment of other age groups.