Do you know if there is alternative path to achieve EQ Credit 9 outside the US? I'm working with a Project in Germany and we have a probem with Sound Transmission. German Standards does not use STC Rating, all Values of Sound Isolation are in dB. Is there any way to convert those dB Values into STC? I know that most of the German Standards are more strict than US Standards, that's why I believe we would be able to achieve this Credit, just I don't know hot to prove it to USGBC. I will be very grateful for any helpful answer!