建筑构件隔声现场测量的近场声全息方法及其应用研究

Study on Near-field Acoustic Holography Method and Its Application in Field Measurement of Sound Insulation of Building Components

针对建筑构件隔声特性的现场评价及改善问题,提出了1种基于近场声全息技术的隔声测量方法,并给出了结合声阵列多通道同步测量、空间声场变换、可视化成像的技术路线;而后在LabVIEW平台下设计开发了1套高效隔声测量系统,实现了该方法;最后对测量系统进行了实际应用。结果表明,文中所提出的方法及其系统具有较好的准确性和可靠性,适用于现场测量,能够帮助测试人员在缺乏先验知识的条件下,快速、全面、准确地测量及评价建筑构件的现场隔声特性,并为隔声性能的优化设计提供技术支持。该方法对绿色建筑评价、声学设计和室内噪声控制等领域有着重要的研究价值和显著的社会效益。

Targeting at the problem of on-site evaluation and improvement of sound insulation characteristics of building components,a sound insulation measurement method based on near-field acoustic holography was proposed,and the technical route of combining sound array multi-channel synchronous measurement,spatial sound field transformation,and visual imaging was mapped.A set of efficient sound insulation measurement systems was further designed and developed under the platform of LabVIEW,and the proposed method was realized.The results show that the proposed method and its system have better accuracy and reliability,are suitable for field measurement,and can help testers without prior knowledge to measure and evaluate the on-site sound insulation characteristics of building components in a fast,comprehensive and accurate manner,and provide technical support for the optimal design of sound insulation performance.This method is of significant research value and social benefits in the fields of green building evaluation,acoustic design,and indoor noise control.