固体声在建筑物内的衰减、反射和透射  

The Attenuation,Reflection and Transmission of Solid-borne Sound Wave in Buildings

作　　者：嵇正毓 展漫军[2] 

机构地区：[1]广州宇岚环境技术发展有限公司,广东广州510655 [2]南京市环境保护科学研究院,江苏南京210013

出　　处：《污染防治技术》2011年第3期1-5,共5页Pollution Control Technology

摘　　要：固体声波在建筑物内传播会产生衰减、反射和透射。文中对居民楼内的固体传声进行了理论分析,认为建筑物内固体声传播过程中存在扩散衰减、结构突变衰减和阻尼损失衰减。同时,固体声波在墙体或楼板内反射使声能密度大大增加;固体声在传播过程中会向空气中透射,使得居民室内产生结构噪声污染。文中对某小区变压器房结构噪声进行理论分析和计算,预测了变压器房上方室内的结构噪声级,计算结果表明,当设备基础上振动级达到90 dB时,二楼居民室内的结构噪声级可达到41.3 dB,这对人们的正常生活会产生十分不利的影响。计算值与实际测量值较为吻合,说明理论分析和预测计算基本是可信的。The spreading of solid - borne sound wave in buildings may bring forth attenuation, reflection and transmission. This paper analysed the spreading of solid - borne sound wave in buildings and considered that the attenuation of solid - borne sound transmitting through buildings comes from acoustic scattering, structure mutation and viscosity absorption. And the reflection of solid - borne sound in building - wall and building - floor increased the energy density greatly. Moreover, the solid - borne sound in spreading may transmit towards the air and produce the structural - sound pollution in buildings. The structural - sound in one trans- former - room in a residence community was analysed and theoretically calculated the structural - sound level in upper - stairs room. The results showed that when the vibration - level on the foundation of the transformer equipment is 90dB （A） , the structural - sound level in upper - stairs room is 41.3dB（A） , which play harmful role in the regular living of people. The results of structural - sound level from calculations in this paper coincided with the practical measurements in some inhabitant rooms.

关 键 词：固体声 衰减 反射 透射 结构噪声 

分 类 号：TB53[理学—物理]