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Acoustic source localisation inside cabins

机译:舱内的声学源定位

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摘要

Sound Source Localization (SSL) techniques are now rather well operational in free field. On the opposite, those techniques cannot be used in compartments due to reflective waves which cause important localization limitations. The actual paper presents two methods to deal with SSL inside cabins: - In order to cartography a limited zone, the use of a half cylindrical acoustic antenna positioned in near field will give the best results we can expect in terms of spatial resolution and dynamics. The processing is the Nearfield Focusing also use for SSL in free field. - In order to cartography the entire compartment, MicrodB has developed an original technique based on the combination of an spherical solid shaped antenna and a processing that takes into account the acoustic diffraction around the antenna (spherical harmonic decomposition). This system is patented by MicrodB in co-ownership with Airbus. The advantages of this solid acoustic sphere against transparent or opened sphere are presented here.
机译:声源定位(SSL)技术现在在自由领域相当良好运行。在相反的情况下,这些技术不能用于由于反射波引起的反射波引起了重要的本地化限制。实际提出了两种方法来处理内部舱SSL: - 为了地图学有限的区域,利用半圆柱形的声学天线放置在近场会给我们可以在空间分辨率和动态方面希望得到最好的结果。该处理是近场聚焦在自由场中的SSL也使用SSL。 - 为了制图整个隔室,微型基于球形固体形状天线的组合和考虑天线周围的声学衍射(球面谐波分解)的处理开发了一种原始技术。该系统由Microdb专利,以空中客车共同拥有。这里给出了该固体声学球对透明或打开的球体的优点。

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