Research on the sound field simulation system for acoustic virtual reality in auditoriums

礼堂声学虚拟现实声场模拟系统研究

基本信息

批准号：
02452217
负责人：
TACHIBANA Hideki
金额：
$ 2.11万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

For the acoustical designing of such auditoriums as concert halls, opera theaters. and other event halls. acoustic scale medel experiment and numerical simulation techniques have been investigated so far. In order to improve the efficiencies of these simulation techniques. a simulation technique to get acoustic virtual reality. by which subjective impression can be obtained by hearing the sounds in models of auditoriums, has been developed in this study as follows.(1) To realize natural hearing sensation in three dimensional sound fields. a 1/10 scale dummy head microphone system has been developed. By using this system, the binaural transfer function around a head with both ears can be approximately simulated.(2) Digital signal processing techniques have been developed for the measurement of impulse responses in scale model experiments. and for synthesis of "hall sounds" by convolving the binaural impulse responses and arbitrary sound sources (dry music, speech and so on).(3) The transaural presentation system has been developed, by which we can hear the synthesized sound with three dimensional spatial sensation by using two loudspeaker system located in an anechoic room.By the hybrid simulation technique using scale modelling technique, and the digital simulation technique developed in this study, not only physical characteristics but also subjective impression in auditoriums can be predicted. This simulation technique will be very useful for the acoustical design of auditoriums.

用于音乐厅、歌剧院等礼堂的声学设计。和其他活动大厅。迄今为止，已经研究了声尺度模型实验和数值模拟技术。为了提高这些模拟技术的效率。一种获得声学虚拟现实的模拟技术。通过在礼堂模型中听到声音可以获得主观印象，本研究对此进行了如下研究：(1)实现三维声场中的自然听觉。已开发出 1/10 比例的仿真头麦克风系统。通过使用该系统，可以近似模拟双耳头部周围的双耳传递函数。(2)已经开发了数字信号处理技术，用于测量比例模型实验中的脉冲响应。并通过将双耳脉冲响应和任意声源（干音乐、语音等）进行卷积来合成“大厅声音”。（3）开发了跨耳呈现系统，通过该系统我们可以听到三维合成声音通过使用位于消声室中的两个扬声器系统的空间感觉。通过使用比例建模技术的混合模拟技术以及本研究中开发的数字模拟技术，不仅可以预测礼堂的物理特征，还可以预测礼堂的主观印象。这种模拟技术对于礼堂的声学设计非常有用。