全频段房间脉冲响应的混合方法模拟  

The full band simulation of room impulse response through hybrid method

作　　者：王红卫[1] 

机构地区：[1]亚热带建筑科学国家重点实验室华南理工大学建筑学院,广东广州510640

出　　处：《四川建筑科学研究》2011年第4期269-272,共4页Sichuan Building Science

基　　金：广东省自然科学基金博士启动资助项目(7300858);教育部博士点启动基金资助项目(20070561061);华南理工大学中央高校基本科研业务费(2011ZM0077)

摘　　要：在过去的几年里,可听化技术越来越受到重视。本文作者首先回顾了可听化技术的发展,然后,为了实现厅堂脉冲响应的混合广谱(包括低频)模拟,提出了一种改进的混合算法,它结合了几何声学和波动声学方法,用Odeon软件对中频和高频脉冲响应进行了模拟,通过FDTD方法对低频脉冲响应模拟。最后,脉冲响应的相位通过希尔伯特变换进行重构。结果验证了改进方法的可行性,同时表明,时域有限差分可以提高可听化听音质量。More and more attention has been paid to the auralization during the past few years.In this paper,the auralization technique was reviewed at first.Then,to realize the hybrid broad-spectrum simulation in the auditorium including the low frequency,an improved hybrid algorithm,which combines geometric acoustics and the wave acoustics method,has been proposed.The middle and the high frequency of the impulse response were simulated by using Odeon software,while the low frequency of the impulse response was simulated through the FDTD method.The method can deal with truly lower frequency bands simultaneously by using the low frequency.Furthermore,the phase of the impulse was reconstructed through the Hilbert transform.The results validated the applicability of the improved method and they have also shown that FDTD can improve auralization,although it not always create more virtual sound field.

关 键 词：可听化 脉冲响应 卷积 主观试验 相空间重构 时域有限差分 

分 类 号：TU112[建筑科学—建筑理论]