This article deals with a controversial topic in the field of reverberation chambers which is the potential efficiency of inserting diffracting metallic objects in order to improve the performance of these so-called “chaotic” chambers at low frequency. Taking advantage of the accuracy of the “well-stirred condition” method, an extensive campaign of measurements helps to conclude on the absence of any undeniable effect of such diffracting objects. It is also demonstrated that the insertion of these objects modifies (slightly) the quality factor of the chamber. Therefore, the performance of a chamber having different chaoticity degree has to be compared with and without these objects for the same Q-factor, which requires small amount of absorbers to be inserted in the chamber having a lower chaoticity degree in order to compensate the metallic losses of these diffractors. Otherwise, a bias is introduced which can lead to draw erroneous conclusions on their effects.

中文翻译：

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关于插入金属衍射器以提高混响室低频性能的可能好处


本文讨论混响室领域的一个有争议的话题，即插入衍射金属物体的潜在效率，以提高这些所谓的“混沌”室的低频性能。利用“充分搅拌条件”方法的准确性，进行广泛的测量有助于得出这样的衍射物体不存在任何不可否认的影响的结论。还证明这些物体的插入会（稍微）改变腔室的品质因数。因此，必须在具有相同 Q 因子的情况下比较具有不同混沌度的腔室的性能和没有这些物体的性能，这需要在具有较低混沌度的腔室中插入少量吸收器以补偿金属的影响。这些衍射元件的损失。否则，就会产生偏差，导致对其影响得出错误的结论。