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Room Mode Calculator

 二维码 35
Room Mode Calcultor

                                             This calculator requires a JavaScript capable browser

English Units Version

This JavaScript calculator will determine the Axial, Tangential and Oblique room modes of regular rectangular shaped rooms with uniform wall  construction. Axial room modes involve only a single room dimension, Tangential room modes involve two surfaces and Oblique modes involve three surfaces (across the corners). This is especially useful in finding the  optimum room shape for home theatre and listening rooms, studios, and practice rooms. When  the modal frequencies are plotted on a graph (still just a bit beyond the capability of  JavaScript) the distribution should be uniform, and there should not be a stacking of modal  frequencies. For all practical purposes, any modal frequencies above 300Hz will be swamped  by other room acoustic effects.

This Javascript calculator only looks at the first 9 integer values for each type of  mode (1-1-1, 2-2-2, 3-3-3, ...9-9-9)   and does not necessarily capture every possible mode.  It's primary purpose is to show the basic effects of inappropriate room dimension  selections and not act as a design tool. If you need a design tool, you may want to  investigate RPG Room Optimizer software

Room Dimensions







Room length
Metres


Room width
Metres


Room height
Metres




Axial Room Modes


Axial.gif

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Tangential Room Modes

Tangential room modes have 1/2 of the energy of axial modes (-3dB). This calculator only  plots tangential modes of the same order for each reflection in each plane (eg: 1,1,0:  1,0,1: 0,1,1: 2,2,0: 2,0,2: 0,2,2 etc.) which will not cover all possible modes. This is  strictly a limitation in the file size of the javascript calculator and output plotting  ability. If you want to find every possible mode, you'd need to take a more rigorous  approach.

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Oblique Room Modes

Oblique room modes have 1/4 of the energy of axial modes (-6dB). This calculator only  plots oblique modes of the same order for each reflection in each configuration (eg: 1,1,1:  2,2,2: 3,3,3: 4,4,4 etc.) which will not cover all possible modes like 1,2,1 or 2,3,4 etc..  This is strictly a limitation in the file size of the javascript calculator and output  plotting ability. If you want to find every possible mode, you'd need to take a more  rigorous approach.

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Images from B&K Technical Review.

This information is provided with no warranty of its accuracy, or applicability,  and any use made of this information is done so at the sole risk of the user.



文章分类: 建声
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