臺灣博碩士論文加值系統

基頻擾動分析為嗓音聲學的重要參數，研究指出基頻擾動的頻率範圍與發聲的機轉相關，本研究希望藉由修正音聲基頻逐週期變異的計算方式，了解基頻變異在不同頻譜的功率強度是否與音質聽知覺的改變有關。
本研究95位對象主要來自台北地區教學醫院院耳鼻喉部、國小及合唱團，受試者經由醫師診斷，並經由兩位語言治療師共評，其GRBAS量表之G得分在2以上者，為嗓音異常組，其餘則為嗓音異常組；男性共49人，正常組37人
，異常組12人；女性共46人，正常組33人，異常組13人。
研究者使用音聲基頻變異功率頻譜法分析所有受試者發持續母音/阿/的頻率變異功率帶，以及使用GRBAS量表評估受試者在聽知覺的各項得分。以T檢定分別比較兩性別，嗓音正常組與嗓音異常組功率頻譜之差異。再以同時回歸分析功率頻譜與音質聽知覺之相關。
結果發現女性嗓音正常組與嗓音異常組之功率頻譜達顯著差異，男性兩組僅高頻率功率帶達顯著差異。以功率頻譜作為音質聽知覺之預測變項，對於五項因值得分之整體解釋力約9%至25%。因此，僅以功率頻譜法分析音聲基頻變異目前仍無法解釋音質聽知覺之變化，仍需配合其它聲學、氣動學之參數。而此分析方式的穩定度高，適合作為監控嗓音變化的一項指標。

Fundamental frequency (F0) variation is an important parameter for acoustic analysis. The range F0 variation is related to the phonation mechanism. The present study aimed to investigate the correlation of power spectral analysis of F0 variation and psychoacoustic analysis in analyzing voice quality.
In the present study, 95 participants were recruited from the ENT department of several teaching hospitals, an elementary school and a chorus in Taipei. All the subjects were divided into 4 groups based on gender, clinical diagnosis and the perceptual voice assessment GRBAS scale conducted by two speech-language pathologists. Those whose G grade is two 2 or above were included in the voice disordered group, while the rest were included into the normal group; in total, there were 49 male participants, 37 of them were normal, while 12 were voice disordered; and 46 female participants, 33 of them were normal, whereas 13 were voice disordered.
The power spectral analysis of F0 variation and psychoacoustic analysis was used to analyze all the participants’ frequency variation power spectrum in sustained vowel /a/, and GRBAS scale to perceptually assess the participants’ voice quality. T-test was used to analyze the difference in power spectral analysis between two genders, and between normal and abnormal groups. Simultaneous regression was used to analyze the correlation of the power spectrum of F0 variation and perceptual voice quality.
Results showed that the power spectrum in female subjects were significant different between the normal to abnormal groups. Only the high power spectrum (PH) was significant different in the two male groups. Using power spectrum as a perceptual voice quality predictor, the explanatory power, R square, ranging from 0.09 to 0.25. Therefore, we could not explain the perceptual change of voice quality only using the power spectral analysis of F0. Other acoustic and aerodynamic parameters are also important to the judgment of voice quality. This analytical method is stable to require the power spectrum of F0 variation, and might be used as an index to monitor the progress of voice quality.

第一章 緒論
第一節 研究背景與動機 6
第二節 研究目的與研究問題 8
第二章 文獻探討
第一節 嗓音音質與聽知覺評估 10
第二節 嗓音的聲學分析 15
第三節 嗓音聲學分析與聽知覺之關係 20
第四節 功率頻譜法分析音聲基頻變異　　　　　　 　　　　　 27
第三章 研究方法
第一節 研究架構 31
第二節 研究對象 33
第三節 研究工具 33
第四節 施測程序 34
第五節 統計分析 36
第四章 研究結果
第一節 　受試者基本資料 36
第二節 　音聲基頻變異功率頻譜圖分析結果 37
第三節 　以功率頻譜圖分析音聲基頻變異與音質聽知覺之相關　　 40
第五章 研究討論與結論 47
第一節 以功率頻譜法分析音聲基頻變異之結果 47
第二節 以功率頻譜法分析音聲基頻變異與音質聽知覺之相關 49
第三節 研究結果討論與限制 51
第四節 結論 53
參考文獻
附錄一 GRBAS聽知覺評估量表

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