有了ENC，您就不再需要繁鎖的手工計算過程，也除去了計算錯誤的風險。幾乎所有的計算程序都可在這本書中找到 - Engineering Noise Control: Theory and Practice, Fourth Edition，它是由D.A. Bies和C.H. Hansen所驗證過的計算程序，並且封裝在一個Windows圖形用戶界面，非常易於使用，並且以表格和圖形的形式呈現結果。計算程序已經通過全面測試和檢查。所有的算法都已包含在第四版教科書裡。
A useful feature is the ability to run an analysis several times and plot the results for each run on the same axes to explore the effect of changing various input parameters and to allow a design goal to be achieved quickly. Targeted users are mechanical engineers, noise and vibration consultants and students undertaking noise control courses, although anyone insterested in noise control or who has a noise problem would benefit. The software is divided into seven modules, corresponding to various sections of the text book..
Common to all modules are:
- ability to use your own material properties or use the in-built ectensive data base
- multiple curves placed one at a time on the same axes to compare the effect of parameter changes
- graphical windows interface with pop-up menus and data plots
The software is divided into seven modules that roughly follow the layout of the book, Engineering Noise Control, 3rd Edition, by D.A. Bies and C.H. Hansen. Each module is associated with unique tool bar symbols (see example below) that represent different calculation procedures from different sections of the book chapter or chapters associated with the particular module. You can select the module you want from the "Options" menu at the top of the screen. Each module has a number of windows which can be selected by clicking on the appropriate symbol on the tool bar. Each window has a number of panels, each of which represents a particular calculation.
The modules and the chapters of the book that they represent are listed in the following table.
|Module number||Book chapters
|1||1, 2, 3, 4|
|3||7, App. C|
When you select a particular module, you will find that a page will pop up that represents one particular window in that module. Each window in the module is represented by an icon in the tool bar (see an example above for the module 4 tool bar). You can tell which window you are currently in because the corresponding icon in the tool bar will appear in one of the corners of the screen.
The symbol on the far right is the "run" symbol on which you often need to click to make sure a new calculation occurs after you change some input parameters. The three icons to the left on the tool bar allow you to respectively, start a new calculation, open an old calculation previously stored on a file, and save the current calculation parameters to file.