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Average beamforming in reverberant fields: Application on helicopter and airplane cockpits

机译：混响场中的平均波束成形：在直升机和飞机驾驶舱中的应用

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摘要

The aim of this paper is to present the applicability of the average beamforming (ABF) as a helpful technique to map acoustic emission for interior noise in which we can assume that sources exist only on the wall, but not in the internal volume. In these conditions conventional beamforming measurements show disturbing pseudo-sources in the acoustic maps due to internal reflections that are erroneously interpreted by the algorithm: these pseudo-sources are in many cases also stronger than the real one. The proposed procedure consists in carrying out subsequent conventional beamforming measurements from different known locations which are combined in statistic sense: through both the wider "virtual" array obtained and the map of sample standard deviation of single measurement a great improvement in the resolution and in the map quality is achieved, with a very good accuracy and robustness, eliminating internal reflections. The uncertainty of the proposed strategy is also analyzed.
机译：本文的目的是介绍平均波束成形（ABF）作为一种有用的技术来绘制内部噪声的声发射图的方法，在这种技术中，我们可以假设声源仅存在于墙壁上，而不存在于内部体积中。在这种情况下，传统的波束成形测量结果会由于算法错误地解释了内部反射而在声波图中显示出干扰的伪声源：这些伪声源在许多情况下也比真实声源更强。拟议的程序包括在不同的已知位置进行后续的常规波束成形测量，这些测量在统计意义上进行了组合：通过获得更大的“虚拟”阵列和单次测量的样品标准偏差图，可以极大地提高分辨率和分辨率。实现了地图质量，具有非常好的准确性和鲁棒性，消除了内部反射。还分析了所提出策略的不确定性。

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  • 来源
    《Applied Acoustics》 |2013年第1期|198-210|共13页
  • 作者

    Paolo Castellini; Andrea Sassaroli; Antonio Paonessa; Alexander Peiffer; Arno Roeder;

  • 作者单位

    Universita Politecnica delle Marche, Via Brecce Bianche,60131 Ancona, Italy;

    Universita Politecnica delle Marche, Via Brecce Bianche,60131 Ancona, Italy;

    C.T.O. Eng., ALEN1A Aeronautka S.pA., Viale dell'Aeronautica, 80038 Pomigliano d'Arco, Napoli, Italy;

    EADS Innovation Works, Dept. IW-SP, 81663 Munich, Germany;

    EADS Innovation Works, Dept. IW-SP, 81663 Munich, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    beamforming; reverberant field; aeronautics;

    机译：波束成形混响场航空学;

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