An improved method for measuring the surface sound energy diffusion coefficient in a room |
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作者姓名: | ZHANGJiping WUShuoxian LINingrong |
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作者单位: | [1](Zhejian9ResearchandDesignInstituteofEnvironmentalProtectionZhejiang31000?)(CollegeofCivilEngineerin9andArchitecture,Zhefian9UniversityZhejiang31002?) [2]DepartmentofArchitecture,SouthChinaUniversityofTechnologyGuangzhou510640 [3]StateKeyLaboratoryofModernAcoustics,NanjingUniversityNanjing210093 |
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基金项目: | This work was supported by the State Key Lab.of Modern Acoustics,Nanjing University. |
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摘 要: | The partly specular reflection and partly diffusion reflection model is a convenient way to express the phenomena of surface sound energy scattering in room acoustics. Sound energy diffusion coefficient becomes a key factor to study surface scattering. But there have been very few methods for determining the average sound energy diffusion coefficient. Vorliinder proposed such an easy one based on the correlation principle. However, his method ignored the correlation from direct sound, in which defect is present. A new approximate method for calculating sound energy diffusion coefficient, including direct sound and first strong reflectionsis presented. Therefore, Vorlaender‘‘‘‘‘‘‘‘s defect is overcome. In addition, with the aid of digitalmeasuring technology, a relevant measuring system was developed. The experiment resultshows that the method is improved than Vorlaender‘s.
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关 键 词: | 室内声学 建筑声学 表面声能散射 声能传播系数 声散射模型 |
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