Starecki Tomasz
Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland.
J Acoust Soc Am. 2007 Oct;122(4):2118-23. doi: 10.1121/1.2773929.
Modeling of small Helmholtz resonators based on electroacoustical analogies often results in significant disagreement with measurements, as existing models do not take into account some losses that are observed in practical implementations of such acoustical circuits, e.g., in photoacoustic Helmholtz cells. The paper presents a method which introduces loss corrections to the transmission line model, resulting in substantial improvement of simulations. Values of the loss corrections obtained from comparison of frequency responses of practically implemented resonators with computer simulations are presented in tabular and graphical form. A simple analytical function that can be used for interpolation or extrapolation of the loss corrections for other dimensions of the Helmholtz resonators is also given. Verification of such a modeling method against an open two-cavity Helmholtz structure shows very good agreement between measurements and simulations.
基于电声类比的小型亥姆霍兹共鸣器建模常常与测量结果存在显著差异，因为现有模型没有考虑到在这种声学电路的实际应用中观察到的一些损耗，例如在光声亥姆霍兹腔中。本文提出了一种对传输线模型引入损耗校正的方法，从而显著改善了模拟结果。通过将实际应用的共鸣器的频率响应与计算机模拟结果进行比较而获得的损耗校正值，以表格和图形形式呈现。还给出了一个简单的解析函数，可用于对其他尺寸的亥姆霍兹共鸣器的损耗校正进行插值或外推。针对开放式双腔亥姆霍兹结构对这种建模方法进行验证，结果表明测量值与模拟值之间具有很好的一致性。
