| Summary: | 碩士 === 國立海洋大學 === 造船工程學系 === 86 === The aim of this dissertation is to develop anumerical method for
impulse response calculation in three-dimensional enclosure
sound field. A greater emphasis focus on the boundary integral
equation instead of experiments for impulse response.Ten
octavebands summation are proposed to simulate anlsδ(t) at a
point, and the band summation(or a single band) so simulated is
then transformed to a input sources of frequency domain by
Fourier Transform (FT). The boundary integral equation in the
time domain is transformed to the frequency domain, and a
frequency-domain boundary element method (BEM) for calculating
the frequency response function H(f), implemented are by using
quadratic surface element (Q8). A rectangular model of three-
dimensional sound field is used to compared with a Fourier
series solution for a pure tone signal.Finally, the frequency
response function H(f) of frequency domain is transformed to the
impulse response function h(t) of time domain by the Inverse
Fourier Transform (IFT) technique in an enclosure.
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