采用导纳法测试了薄铝板的模态密度，并对其测试结果进行了附加质量修正。
Also this paper has tested the modal density of thin aluminum using point admittance, and discussed the influence of mass correction.
研究表明，随着气流马赫数的增加，吸声结构的消声系数明显下降，微穿孔板的非线性声阻和声质量修正值都略有减少。更需注意，在高速流条件下吸声结构的共振峰将会发生偏移。
It is shown that the attenuation coefficient will decrease obviously with the increase of Mach number, and the nonlinear acoustic resistance and acoustic mass will reduce slightly.
由于迭代过程能够提供许多度量和修正机会，所以用它来达到高标准的质量是非常适合的。
An iterative process is particularly adapted to achieving quality since it offers many measurement and correction opportunities.
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