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URN etd-0214107-143250 Statistics This thesis had been viewed 2776 times. Download 361 times. Author Wei-Chieh Huang Author's Email Address No Public. Department Computer Science and Enginerring Year 2006 Semester 1 Degree Master Type of Document Master's Thesis Language Chinese&English Page Count 45 Title Studies on the boundary of digital waveguide mesh Keyword boundary of digital waveguide boundary of digital waveguide Abstract In recent years, people usually focus on studying the application of sound field. There are great relations between application and propagation of the sound. Thus the simulation of the propagating sound field is turned into a quite important research. Original method to measure the sound pressure of each receiver from multiple sources, needs to calculate the sound propagation paths between each pair of sound source and acceptance point, decaying rate, phase and the reflection coefficient on the edge one by one. Getting the sound pressure of each acceptance point is a time-consuming thing.
In this paper, an artificial sound field model is discussed. The purpose of this thesis is accelerating the calculation of the sound wave propagation energy in sound’s studying and reducing the complexity of the research. This model is simulated by softwave MATLAB using physical wave characteristics to simulate sound wave propagating in rectangular digital waveguide mesh. Only the setting for the sound source and the number of propagation times are needed, then the sound pressure of thereceiving point are collected.
The reflection should not appear when the propagating wave touching the edge
of region of interest. Thus simulating a sound field with non-reflection boundary is needed. In this thesis, discussing two methods to make a non-reflection boundary for the region of interest. Using a finite region with non-reflection models a infinite field. The sound wave propagation isn't affected by the reflection.
Advisor Committee Chia-Ming Chang - advisor
Files Date of Defense 2007-01-23 Date of Submission 2007-02-14