Mærsk McKinney Møller Institute, University of Southern Denmark, Campusvej 55 5230 Odense M, Denmark.
J Acoust Soc Am. 2011 Feb;129(2):1046-58. doi: 10.1121/1.3519408.
Taking into account directivity of real sound sources makes it possible to try solving an interesting and biologically relevant problem: estimating the orientation in three-dimensional space of a directional sound source. The source, of known directivity, produces a broadband signal (in the ultrasonic range, in this application) that is recorded by microphones whose position with respect to source is known. An analytical method to process the recorded signals and estimate source orientation is developed in this paper. Experiments testing method performance in estimating source orientation were performed both in a laboratory environment with a Polaroid transducer as source and in a flight room with a Myotis daubentonii bat. In the first case, results showed the estimation method to be accurate and pointed out its limitations. The latter case is significant as an example biological application of the method for extracting behavioral features from bats; results are compared with alternative calculations based on microphone root-mean-square (rms)-pressure values.
考虑到实际声源的指向性，可以尝试解决一个有趣且与生物学相关的问题：估计指向性声源在三维空间中的方向。该声源具有已知的指向性，会产生宽带信号（在此应用中为超声波范围），由位置已知的麦克风进行记录。本文开发了一种用于处理记录信号并估计声源方向的分析方法。在实验室环境中使用宝丽来换能器作为声源和在飞行室内使用 Myotis daubentonii 蝙蝠进行了测试该方法性能的实验。在前一种情况下，结果表明该估计方法准确，并指出了其局限性。后一种情况很重要，因为它是该方法从蝙蝠中提取行为特征的生物应用的示例；结果与基于麦克风均方根（rms）-压力值的替代计算进行了比较。
