基於物理模型之風鈴聲音合成與預測

Abstract

模態合成法常被用於合成剛體的聲響，是否能夠實現接近真實世界的聲音品質是這種方法的主要挑戰。本論文是利用有限元素分析法先預估風鈴參數，利用預估參數合成聲響再比對參考風鈴錄音檔萃取其中差異特徵，再透過物理計算預測出相同材料不同尺寸的風鈴聲響。問卷結果顯示，多數聆聽者對於真實的錄音與此系統合成的音檔無法分辨。

Modal synthesis methods have often been used to synthesis sounds for rigid bodies. One of the key challenges in the methods is realistic audio quality can be achieved.This thesis introduce a method using FEM analysis to estimate material parameters.It also presents a method that compensates for the differences between the recording and the sound synthesized to create the final synthesized audio. Both the estimated material parameters and the residual compensation naturally transfer to different sizes of windchimes. The questionnaire results show most of the people can not distinguish between the recording and the final synthesized audio.