Mirror image source method based long spacing reverberation time obtaining method

A technology of reverberation time and long space, applied in stereo systems, electrical components, etc., can solve problems such as large reverberation error in long space

Active Publication Date: 2014-05-21
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the problem of large errors in obtaining long space reverberation in existing methods, thereby providing a method for obtaining long space reverberation time based on the image source method

Method used

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  • Mirror image source method based long spacing reverberation time obtaining method
  • Mirror image source method based long spacing reverberation time obtaining method
  • Mirror image source method based long spacing reverberation time obtaining method

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specific Embodiment approach 1

[0058] DETAILED DESCRIPTION One. A method for obtaining long-space reverberation time based on the mirror source method,

[0059] 1. Consider each mirrored sound source

[0060] In a long space with geometric reflection boundaries, the distribution of mirrored sound sources is like figure 1 Shown. If the point sound source is L from the ceiling a , Distance from side wall L b The receiving point is at a distance from the sound source z and at the center of the cross section. The distance D between the mirror sound source (m, n) and the receiving point z,m,n As:

[0061] D z , m , n = [ b | m - g ( m ) | + 2 L b m | m | g ( m ) ] 2 + [ a | n - g ( n ) | + 2 L a n | n | g ( n ) ] 2 + z 2

[0062] ( m , n = - ∞ . . . ∞ ) - - - ( 1 )

[0063] In the formula: when x is odd, g(x)=1; when x i...

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Abstract

The invention relates to a long spacing reverberation time obtaining method, particularly relates to a mirror image source method based long spacing reverberation time obtaining method, and aims to solve the problem of big errors of existing methods for obtaining long spacing reverberation. The long spacing reverberation time obtaining method includes arranging a point acoustic source (m, n) and a receiving point at the position which is z from the mirror image acoustic source in long spacing with a geometric reflection boundary, and subsequently performing calculation according to acoustic energy and the distance between the point acoustic source (m, n) and the receiving point to finally obtain long spacing reverberation time. The mirror image source method based long spacing reverberation time obtaining method is applicable to obtaining long spacing acoustic reverberation time of subway stations, passages and the like.

Description

Technical field [0001] The invention relates to a method for obtaining long spatial reverberation time. Background technique [0002] At present, the existing method of obtaining reverberation time is to use classical acoustic theory, which is suitable for performing arts spaces dominated by acoustic design, such as cinemas, theaters, and auditoriums, but it is not suitable for mixing with the long spaces widely existing in large public buildings. The acquisition of response time. According to the classical acoustic theory method, the error of the long-space reverberation obtained is larger. Summary of the invention [0003] The invention aims to solve the problem of large errors in obtaining long-space reverberation in the existing method, thereby providing a method for obtaining long-space reverberation time based on the mirror source method. [0004] A method for obtaining long-space reverberation time based on the mirror source method, which includes the following steps: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S3/00H04S7/00
Inventor 康健赵巍
Owner HARBIN INST OF TECH
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