臺灣博碩士論文加值系統

在本論文，使用希爾伯特-黃轉換分析14個弗氏海豚聲音訊號的邊際頻譜樣本，將訊號分類成第一類，第二類和第三類，分別有5、5和4個弗氏海豚聲音訊號樣本。第一類聲音樣本的第1個本質模態函數和第2個本質模態函數的能量參考總能量比例相加，該本質模態函數能量參考總能量比例大於55%。第二類聲音樣本的第1個本質模態函數能量參考總能量比例大於60%。第三類聲音樣本的第1個本質模態函數和第二個本質模態函數的能量參考總能量比例皆大於10%。第一類聲音樣本邊際頻率1、邊際頻率2和邊際頻率4能量參考總能量主要分佈頻帶為8-17KHz、3-5KHz和0-2KHz。第二類聲音樣本邊際頻率1、邊際頻率2和邊際頻率4能量參考總能量主要分佈頻帶為8-18KHz、3-7KHz和1-3KHz。第三類聲音樣本邊際頻率1、邊際頻率2，邊際頻率4和邊際頻率7能量參考總能量主要分佈頻帶為10-16KHz、4-9KHz、0-2KHz和0-1KHz。從這些分析結果，我們可以瞭解到弗氏海豚聲音邊際頻率特徵。

In the thesis, 14 samples of the marginal spectrum (MS) of Fraser’s dolphin voices were analyzed using the Hilbert-Huang transform (HHT) method, and classified as Class I, II, and III, comprising 5, 5, and 4 Fraser’s dolphin voice samples, respectively. The ratios were found to have greater than 55% IMF (intrinsic mode function) energy with respect to the refereed total energy of the 1st IMF plus the 2nd IMF for Class I voice samples; greater than 60% IMF energy with respect to the refereed total energy of the 1st IMF for Class II voice samples; and greater than 10% IMFs energy with respect the refereed total energy of the 1st and 2st IMFs for Class III voice samples. The domain marginal frequencies (MFs), MF1, MF2, and MF4, for Class I voice samples, are 8 -17 KHz, 3-5 KHz, and 0-2 KHz, respectively. MF1, MF2, and MF4, for Class II voice samples, are 8-18 KHz, 3 -7 KHz, and 1-3 KHz, respectively. MF1, MF2, MF4, and MF7 for Class III voice samples, are 10 -16 KHz, 4 -9 KHz, 0-2 KHz , and 0-1 KHz, respectively. From these analysis results, we can observe the MFs characteristics of the Fraser’s dolphin voice samples.

摘要 I
Abstract II
目次 III
圖次 IV
表次 V
第一章 緒論 1
1.1前言 1
1.2 參考文獻回顧 1
1.3研究動機及研究方法 2
1.4研究方法 2
1.5論文大綱 2
第二章 研究背景與相關知識 4
2.1弗氏海豚 4
2.2 希爾伯特-黃轉換(HHT) 4
2.3經驗模態拆解(EMD) 5
2.4本質模態函數(IMF) 5
2.5瞬時頻率(IF) 5
2.6邊際頻率(MF) 5
第三章 弗氏海豚聲音訊號本質模態函數(IMF)特徵分析 7
3.1弗氏海豚聲音訊號 7
3.2弗氏海豚第一類聲音樣本訊號IMF分析 12
3.3弗氏海豚第二類聲音樣本訊號IMF分析 18
3.4弗氏海豚第三類聲音樣本訊號IMF分析 24
第四章 弗氏海豚聲音樣本瞬時頻率(IF)特徵分析 29
4.1弗氏海豚第一類聲音樣本IF分析 29
4.2弗氏海豚第二類聲音樣本IF分析 32
4.3弗氏海豚第三類聲音樣本IF分析 34
第五章 弗氏海豚聲音樣本邊際化頻率(MF)分析 37
5.1弗氏海豚第一類聲音樣本MF分析 37
5.2弗氏海豚第二類聲音樣本MF分析 46
5.3弗氏海豚第三類樣本訊號MF分析 54
第六章 結論與建議 63
參考文獻 64

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