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An Acoustic Coupling Method for Coupling Sound Fields

A sound field and acoustic technology, which is applied in the field of acoustic coupling of coupled sound fields, can solve problems such as limitations, and achieve the effects of fast prediction results, high output result accuracy, and easy programming and calculation

Active Publication Date: 2018-12-25
HARBIN ENG UNIV
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Problems solved by technology

However, the assumption that sound travels along a straight line in geometrical acoustics limits the application of this method to high-frequency calculations and analysis

Method used

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  • An Acoustic Coupling Method for Coupling Sound Fields
  • An Acoustic Coupling Method for Coupling Sound Fields
  • An Acoustic Coupling Method for Coupling Sound Fields

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] The invention discloses an acoustic coupling technology method that can be used to solve the difficult problem of analyzing the acoustic characteristics of the coupled sound field. The specific steps are: extracting the shape information and boundary condition information of the sound field space; coupling two adjacent sound fields through the coupling interface, and extracting the corresponding coupling information; obtaining the characteristic equation of the coupled sound field through the energy variation method, and establishing a solver based on matlab; Finally, the predicted acoustic characteristic information such as the natural frequency and mode of the coupled sound field is output. The method of the invention does not need to put forward additional assumptions on the coupling structure, has clear physical meaning, simple processing process, ...

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Abstract

The invention discloses an acoustic coupling method of coupling acoustic fields. The method comprises setting a coupling interface impedance of two coupling acoustic fields, selecting a sound pressure function of each acoustic field, determining a Lagrange functional of each acoustic field according to a variational method, determining coupling energy of the two coupling acoustic fields, determining a coupling rigidity matrix of a coupling acoustic space coupling interface and a rigidity matrix corresponding to each acoustic field and a quality matrix corresponding to each acoustic matrix, performing combinations according to the rigidity matrixes of the two acoustic fields, the quality matrixes of the two acoustic fields and the coupling rigidity matrix, determining a coupling acoustic field characteristic equation, and obtaining coupling acoustic field acoustic forecast information. The acoustic coupling method has the advantages of rapid convergence of a forecast information and less resources needed by calculation.

Description

technical field [0001] The invention belongs to an acoustic coupling analysis method in the field of acoustics, and in particular relates to an acoustic coupling method for coupling a sound field, which is used to solve the problem of the acoustic characteristics of a coupled sound field. Background technique [0002] Coupling space refers to a space form composed of multiple independent acoustic systems connected through openings, which is commonly found in general buildings, concert halls and opera houses. Therefore, the research on the acoustic characteristics of coupled spaces has important engineering background and research significance. In general, research methods on coupled spatial acoustic fields are divided into two categories, namely geometrical acoustics and wave acoustics. The former includes statistical acoustic model, scattering equation model and computational geometric acoustics, while the latter mainly refers to the mode superposition method. However, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
Inventor 靳国永陈跃华马相龙石双霞张春雨刘志刚
Owner HARBIN ENG UNIV
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