To provide an analyzer of a sound field around an optional scattered body.
This analyzer is equipped with a direct wave Fourier expansion means for performing Fourier expansion of a direct wave based on inputted sound wave incidence condition information; a scattered wave Fourier expansion means for performing Fourier expansion of a scattered wave based on inputted scattered body shape information; a boundary condition expansion means for inputting inputted boundary condition information, direct wave expansion information outputted from the direct wave Fourier expansion means, and scattered wave expansion information outputted from the scattered wave Fourier expansion means, and expanding the boundary condition based on the scattered body shape information; an equation deriving means for deriving a simultaneous linear equation from expanded boundary condition information outputted from the boundary condition expansion means; a scattered wave calculation means for calculating scattered wave information by solving the simultaneous linear equation derived by the equation deriving means; and a synthesizing means for synthesizing the direct wave expansion information outputted from the direct wave Fourier expansion means with the scattered wave information outputted from the scattered wave calculation part, and outputting the result.
COPYRIGHT: (C)2009,JPO&INPIT
| JP7028481A | ||||
| JP2004333224A |
Tadashi Takahashi
Takashi Watanabe