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    Sound absorption panel coefficients

    Hi, Over last 2 years I installed quite a few (a few dozens) of 4" sound absorption panels from ATS Acoustics. Most of them of "Bass trap" category with the absorption coefficient advertised as in below image: and others normal, absorbing less lower frequencies. So, first of all, I do not...
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    Single Apparent Source - mesurements

    Some KEF speakers are said to have Single Apparent Source feature. How could this be measured?
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