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Main Page > Useful Calculators > Intelligibility Calculator > Imperial Version |
![]() The Speech Intelligibility CalculatorThis page will calculate reverb time, critical distance, and expected %ALCONS for the room you input here. The results show the inter-relationship between reverberation time, room finishes, speaker selection and speech intelligibility. This calculator is provided as an educational tool to demonstrate this relationship, and any use made of the information here is done at the sole risk of the user. (Let's face it, if it were really this easy would we be giving the information away for free?) Work your way down the page, inputting data where indicated, then push the button to calculate the results. Caveat Room DetailsInput the room dimensions and the additional acoustical finishes in this section. This calculator is based on the Sabine reverberation equation, which makes certain assumptions about the distribution of acoustical treatment or absorptive surfaces. This has been done to keep this a fairly simple calculator. Difficult acoustic spaces will require more detailed reverberation calculations to ensure an accurate prediction of acoustical and sound system performance. The absorption values for the materials shown here are also based on a specific example of each type, and for a specific mounting method, they cannot be generalized across all materials of this type. Room shape will also affect the speech intelligibility, as focusing surfaces and late reflections will dramatically degrade speech intelligibility, as will exterior or interior noise sources. It would be a very bad idea to stretch these assumptions to cover a specific application of your own, as large errors would be possible. Problems with many variables, such as predicted acoustical and sound system performance, cannot be generalized effectively. (Ok class, first of all, let's assume spherical cows...") Caveat... |
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Mc Squared System Design Group, Inc
323 - 901 West 3rd Street, North Vancouver, BC. V7P 3P9 Ph 604-986-8181 116-5100 Anderson Way, Vernon, BC V1T 0C4 Ph 604-986-8181 403 - 1240 Kensington Rd NW, Calgary, AB. T2N 3P7 Ph 403-452-2263 901 King Street West, Suite 400, Toronto, ON. M5V 3H5 Ph 647-479-8601 |