本論文的研究目標是，以HNM信號模型為基礎，加強原始HNM模型未考慮到的地方，以便發展一個能夠作洞簫聲合成的方法。在HNM參數分析方面，我們首先研究簫聲的聲譜特性，接著研究基頻的偵測的方法及諧波参數的求取方法。在簫聲合成階段，為了提升合成之洞簫聲的自然度，我們提出一種基於ADSR的方法來作時間長度的伸長、縮短，此外為了模擬洞簫吹奏的技巧，我們也研究了轉音和抖音的處理。目前已完成一個線上的洞簫聲合成系統，當拿合成音檔去作聽測實驗，聽測之分數顯示所合成之簫聲只是略像真人吹奏之簫聲，所以仍有很大的改進空間。

The goal of this thesis is to develop a method that can synthesize vertical bamboo flute (VBF) sounds. Here, HNM (harmonic plus noise model) is based and enhanced for places that the original HNM model does not considered. In the analysis of HNM parameters, we study the spectrogram characteristics of VBF sounds first. Then, a method to estimate the fundmental frequently of a signal frame and a method to analyze the harmonic parameters are investigated. In the synthesis of VBF sounds, in order to improve the naturalness level of synthetic VBF sounds, we propose an ADSR(attack，decay，sustain，release) based method to lengthen or shorten a note’s duration. In addition, to simulate the skills for playing a VBF, we have studied methods for synthesizing the sound effects of pitch gliding and pitch and amplitude vibrato. Currently, an on-line system for synthesizing VBF sounds has been built. Synthetic sound files are then took to conduct listening tests. The results of the tests show that the synthetic VBF sounds are just slightly like the VBF sounds played by a person. Therefore, the space to be improved for synthetic VBF sounds is still large.

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