原帖由 深圳北佬 于 2007-10-5 8:00:00 发表
......总体来说,低音的尺寸不能小,否则声音不轻松,高音指向性要好,音场才好,这个用波动学里的核姆霍斯积分可以解释...... |
呵呵：
Helmholtz integral in the acoustics of an inhomogeneous medium
Journal Acoustical Physics
Publisher MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC .
ISSN 1063-7710 (Print) 1562-6865 (Online)
Issue Volume 48, Number 1 / January, 2002
DOI 10.1134/1.1435396
Pages 94-97
Subject Collection Physics and Astronomy
SpringerLink Date Wednesday, January 25, 2006
Helmholtz integral in the acoustics of an inhomogeneous medium
E. L. Shenderov1 Contact Information
(1) Morfizpribor Central Research Institute, Chkalovskii pr. 46, St. Petersburg, 197376, Russia
Received: 20 April 2001
Abstract
Integral relations that generalize the Helmholtz integral for an inhomogeneous medium with arbitrary gradients of its density and the sound velocity in it are obtained. Expressions that determine the Helmholtz integral for problems related to the diffraction and radiation of sound in an inhomogeneous medium are derived. It is shown that, in the case of an inhomogeneous medium, an additional factor depending on the density distribution in the medium appears in the integrand.
