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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >Hybrid method for numerical simulation of room acoustics with auralization: part 1 - theoretical and numerical aspects
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Hybrid method for numerical simulation of room acoustics with auralization: part 1 - theoretical and numerical aspects

机译：带有听觉化的室内声学数值模拟的混合方法：第1部分-理论和数值方面

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摘要

A new hybrid simulation method for room acoustics is presented. It is grounded on two well known numerical simulation techniques for room acoustics. The hybrid method takes geometric acoustics for granted and uses an improved version of the classical ray-tracing technique for computing the specular reflections and a slightly modified energy transition method for simulating the diffuse reflections. The impulse responses (IRs) are then computed by superposition of the specular and diffuse ones. The reverberant part of the IRs gains a much more realistic aspect than the one obtained from either ones method alone. Both the ray-tracing technique and the energy transition method are reviewed and some improved features are discussed. The sound source and the receiver modeling are presented, including a new method for simulating the head related transfer functions (HRTFs), and based on the wavelet technique, which provides a shorter time computation of the binaural impulse responses for auralization purposes. In a companion paper, entitled Hybrid method for numerical simulation of room acoustics: Part 2 - Validation of the computational code RAIOS 3, a validation of the method in an international inter-comparison with other softwares and measurements data is presented, showing the efficiency and the accuracy of the proposed hybrid method over non-hybrid ones.
机译：提出了一种新的室内声学混合仿真方法。它基于两种众所周知的室内声学数值模拟技术。混合方法将几何声学视为理所当然，并使用经典射线跟踪技术的改进版本来计算镜面反射，并使用经过稍微修改的能量转换方法来模拟漫反射。然后通过镜面反射和扩散反射的叠加来计算脉冲响应（IR）。与仅从任一方法获得的结果相比，IR的混响部分具有更加现实的方面。回顾了射线追踪技术和能量转移方法，并讨论了一些改进的功能。提出了声源和接收器建模，包括一种用于模拟与头部相关的传递函数（HRTF）的新方法，并且基于小波技术，该方法可为听觉目的提供更短时间的双耳冲激响应计算。在名为“室内声学数值模拟的混合方法：第2部分-计算代码RAIOS 3的验证”的伴随论文中，对与其他软件和测量数据进行国际比较的方法进行了验证，结果表明了该方法的有效性和有效性。提出的混合方法在非混合方法上的准确性。

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