Скачать или смотреть How to calculate the GLASS STC?

If you are unsure of what rating would work for your project, there are some standards you can go by in helping you to determine your target range. The National Research Council of Canada conducted research on the importance of sound insulation, and found that an effective STC rating of 55 is recommended, and 60+ is ideal, especially in rooms where there is going to be music related noise. These values are sufficient to keep most sounds muffled, but if all you are really trying to do is add privacy to your conversations, an STC rating of 45 should do just fine.
Here also intriduced how to calculate the STC in the different glass configurations.

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