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If it helps, there are a couple of tools you can use to measure room acoustics. REW https://www.roomeqwizard.com/ and Sonarworks reference https://www.sonarworks.com/reference. It's been quite a while since I used either of these tools however I do remember sonarworks' calibration test being the most thorough. The wizard makes things very simple also. It ...


1

You need a gated pulse so microphone records only the reflection. A single pulse can provide a frequency response curve with the proper software


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Well, the problem you are trying to tackle is not one that has a clear solution. There are various research groups as well as companies' R&D departments that are trying to provide their solutions to your problem. The issue here is the "multidimensionality" of the problem at hand. You have time (one dimension), frequency (second dimension, ...


1

I suggest that you do some research into absorption coefficients and look for materials with a low absorption coefficient. If you need further detail I suggest you look at the Master Handbook of Acoustics: http://www.amazon.co.uk/Master-Handbook-Acoustics-Alton-Everest/dp/0071603328


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