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There are slight differences, mostly due to having to unclamp the panel between every product test to remove the previous product. This is why each product gets its own metal test. With more funds, I would have had a machined metal clamp made for the panel, instead of wood, but my wife was laid a few weeks before starting testing, but after I had received samples.
That said, the consistency has shown to be good to +/- 1db. That said, dynamat performed 3db better than raamat, and the decay was much quicker.
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