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сравнение формул по звукоизляции

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Здравствуйте, какая из этих двух формул стеклопакета более звукоизолирующая и можно ли рассчитать Rw для них?

4.4.2 Stratophone - 12 - 5M1 - 10Ar - 6И

6 (закаленное)- 14Ar - 6 - 14Ar - 6 (закаленное)

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