| In many years, medical workers are constantly trying various kinds apparatus and methods to study laryngeal phonic function. Along with the development of medical techniques, people are attaching more and more importance to how to retain and improve phonatory function of larynx. Searching for the methods of acoustic evaluation and phonatory detection has become the focused problem by doctors in otorhinolaryngology and speech pathology. In recent years, along with the seeping of computer technique into voice medical domain, various kinds of software for speech spectrum analysis have come out, and detecting speech impersonally has become the objective demands for the development of phoniatrics. But there is no yet a united standard to judge. One side of the reasons is the characteristics of vocal cords' vibration that is complicated and exquisite movement in three-dimension, and the vibration are more influenced by random factors. Another side of the reasons is that the apparatus and the sampling action and demands used by various researchers are different from each other, as a results, the markers acquired are discrepancy, only get some change tendency as a whole. Besides, along with the age growing, the developmental, maturation and aging of body's phonic organs and other systemsas well the level change of gonadal hormone are all have influence on voice and make the voice characterized with sex and age. It is importance to find out these characteristics and definite the normal reference of acoustic parameters. In this study, in order to offer the firsthand information for the found of acoustic database, the normal adults in different sex and age were compared with their acoustic parameters when pronouncing in different vowels. Based on these studies, the voice of laryngostenosis patients and other common pathologic voice were analyzed to find these characteristics and anatomiphysiologic mechanism.Objective1. To investigate the acoustic characteristics of the normal adults in different sex and age pronouncing in different vowels and definite acoustic database for our Computerized Speech Lab (CSL).2. To investigate the acoustic characteristics of the laryngostenosis patients and offer more objective information about laryngeal functional evaluation for clinical therapies.Methods3. The definition of the acoustic analytic reference of the normal adults100 healthy adults, aged 20-69, were divided into 5 groups, every 10 years as a group, each involve 10 males and 10 female. With the Universal Signal Spectrum Analys (USSA) manufactured by Beijing University of Posts and Telecommunications, the voice date of every people were collected when they were pronouncing the vowel [a] and [i] with continuing bosom voice. Each acoustic parameters such as Coefficient of Period Variation(PV), Relative Average Pertubation(RAP), Jitter Range(JR), Frequency Pertubation Quotient(FPQ), Amplitude Perturbation Quotient(APQ), Harmonica/noise(H/N) and Fundamental frequency(Fo) were compared and analyzed with different vowels and sex and age stages as well. The results were input SPSS 10.0 to have statistical analysis. At the same time, the harmonic waves of sonogram and formants and noise were observed.2. The acoustic characteristics of the laryngostenosis patientsThe voices of laryngostenosis patients were compared with that of normal group and common disease groups of larynx. The results of normal group came from experiment 1. The laryngostenosis group held 26 cases in all, including 14 male and 12 female, aged 20 to 56. The common disease groups were divided into 3 groups, 77 cases in all, aged 21 to 60. Among them, the vocal nodule group held 24 cases, including 8 male and 16 female; the polyp of vocal cord group held 33 cases, including 15 male and 18 female; the laryngeal tumor group held 20 cases, including 14 male and 6 female. The voice date of every people were collected, analyzed and observed just as the way experiment 1.Results1. The definition of the acoustic analytic re... |
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