Laboratoire de Mécanique des Structures et des Systèmes Couplés (LMSSC), Conservatoire National des Arts et Métiers, 292 rue Saint Martin, 75141 Paris Cedex 03, France.
J Acoust Soc Am. 2013 Apr;133(4):2198-207. doi: 10.1121/1.4792359.
This paper presents an application of the data completion method (DCM) for vector intensity reconstructions. A mobile array of 36 pressure-pressure probes (72 microphones) is used to perform measurements near a planar surface. Nevertheless, since the proposed method is based on integral formulations, DCM can be applied with any kind of geometry. This method requires the knowledge of Cauchy data (pressure and velocity) on a part of the boundary of an empty domain in order to evaluate pressure and velocity on the remaining part of the boundary. Intensity vectors are calculated in the interior domain surrounded by the measurement array. This inverse acoustic problem requires the use of a regularization method to obtain a realistic solution. An experiment in a closed wooden car trunk mock-up excited by a shaker and two loudspeakers is presented. In this case, where the volume of the mock-up is small (0.61 m(3)), standing-waves and fluid structure interactions appear and show that DCM is a powerful tool to identify sources in a confined space.
本文提出了一种数据补全方法（DCM）在矢量强度重建中的应用。使用一个由 36 个压力-压力探头（72 个麦克风）组成的移动阵列在平面附近进行测量。然而，由于所提出的方法基于积分公式，DCM 可以应用于任何类型的几何形状。该方法需要在一个空域的部分边界上知道柯西数据（压力和速度），以便在边界的其余部分上评估压力和速度。强度矢量是在由测量阵列包围的内部域中计算的。这个反声问题需要使用正则化方法来获得实际的解决方案。本文提出了一个在封闭的木制汽车行李箱模型中进行的实验，该模型由振动器和两个扬声器激励。在这种情况下，模型的体积较小（0.61m3），出现了驻波和流固相互作用，这表明 DCM 是识别封闭空间中声源的有力工具。
