Synthesis of time-variant virtual room acoustics based on impulse response measurement, analysis, and processing

申请人提出基于空间房间脉冲响应的测量、分析和处理来研究时变虚拟声学的高度复杂且尚未解决的问题，其目标是提供最准确的感知的房间声学重建。这种模拟的基本属性是随时间变化的房间响应，防止人耳适应重复的声音模式。时间差异可能由于以下几个因素而发生：源的移动，源信号的变化（由于声源的方向和频率相关的声辐射模式）、室内空气流动和温度变化、物体和人员的移动、室内边界条件的物理变化（打开门，振动墙壁和窗户，该计划的最终结果将是一个新的虚拟房间的合成，该虚拟房间将联合收割机将选定的声学组件组合成时间-动态响应音乐和语音信号的各种系统，没有重复性。这将克服当前工程解决方案的局限性，这些解决方案使用固定的脉冲响应卷积，并产生不适合音乐表演、排练和录音中的关键应用的静态房间印象。这项跨学科的研究将为自然科学和工程学提供工具，方法和智力成果，同时为推进音乐和声学研究以及生活质量提供手段。其中一个成果将是一个合成脉冲响应库，将用于电声增强共同生活空间的质量。很有可能在10年左右的时间里，将虚拟音响上传到一个人的有线客厅将变得很容易，就像今天将一个新的铃声上传到一个人的手机一样。

The applicant proposes to research highly complex and yet unsolved problem of time-variant virtual acoustics based on measurement, analysis, and processing of spatial room impulse responses with the goal of providing the most accurate perceived reconstruction of room acoustics. The essential attribute of this simulation is time-variant room response that prevents the human ear from adapting to repeating patterns of sound. Time variance can occur due to several factors: movement of the source, change in source signal (due to direction- and frequency-dependent acoustic radiation pattern of the source), air movement and temperature variations within the room enclosure, movements of objects and people, physical changes in room boundary conditions (open doors, vibrating walls and windows, etc).The final outcome of this program will be a synthesis of new virtual rooms that combine the selected acoustic components into time-variant systems responding dynamically to music and speech signals without repeatability. This will overcome the limitations of current engineering solutions, which use fixed impulse response convolutions and produce static room impression unsuitable for critical applications in music performance, rehearsal and recording. This interdisciplinary research will contribute tools, methods and intellectual gains to natural sciences and engineering while providing means for advancing music and acoustics research and the quality of life. One such outcome will be a library of synthesized impulse responses that will be used to electro-acoustically augment the quality of common living spaces. It is likely that in 10 years or so, uploading virtual acoustics to a person's wired living room will be as easy, as it is to upload today a new ring-tone to one's cell phone.