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.

为了对音乐厅，歌剧院等礼堂进行声学设计。和其他活动大厅。到目前为止，已经研究了声学量表Medel实验和数值模拟技术。为了提高这些仿真技术的效率。一种模拟技术，以获得声学虚拟现实。在本研究中，通过听到礼堂模型中的声音来获得主观印象，如下所示。（1）在三维声场中实现自然听力。已经开发了1/10个刻度虚拟头麦克风系统。通过使用此系统，可以大致模拟带有两个耳朵的头部的双耳传递功能。（2）数字信号处理技术是为测量量表模型实验中脉冲响应的测量而开发的。（以及通过卷动双耳脉冲响应和任意声音来源（干音乐，语音等）来综合“大厅的声音”。（3）（3）开发了透射介绍系统，通过使用三维空间感觉，我们可以通过使用两个开发的Simique Inique Inique Inique Inique Inique Inique andriqual Simeique ander Simique Indique of HybrId Indique inderique in nybrid Indiqual Indique of Hybrid Indique insique intakiqual Synique and synique ander synique synique。可以预测研究，不仅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。