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A method for obtaining long spatial reverberation time based on image source 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: 2015-09-16
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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  • A method for obtaining long spatial reverberation time based on image source method
  • A method for obtaining long spatial reverberation time based on image source method
  • A method for obtaining long spatial reverberation time based on image source method

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specific Embodiment approach 1

[0057] Embodiment 1. A method for obtaining long spatial reverberation time based on the image source method,

[0058] 1. Consider each image source

[0059] In a long space with geometrically reflective boundaries, the image sources are distributed as figure 1 shown. If the point sound source is at a distance L from the ceiling a , distance from side wall L b At the position of , the receiving point is at the distance z from the sound source, and is at the center of the cross section. Distance D between image sound source (m,n) and receiving point z,m,n for:

[0060] D z , m , n = [ b | m - g ( m ) | + ...

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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 space 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 such as cinemas, theaters, auditoriums, etc., which are dominated by acoustic design, but it is not suitable for mixing with long spaces that widely exist in large public buildings. Acquisition of ringing time. It should be the method of classical acoustic theory, the error of the long space reverberation obtained by it is relatively large. Contents of the invention [0003] The purpose of the present invention is to solve the problem of large error in obtaining long space reverberation by existing methods, thereby providing a method for obtaining long space reverberation time based on an image source method. [0004] A method for obtaining long space reverberation time based on image source method...

Claims

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Application Information

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