I can, if the cinema you were in was all digital. Ads and trailers are set to a higher volume to grab attention (they do this on TV too but it's not as noticeable) with 35mm we used to put magnetic pulse strips on the print itself that the projector would read and lower the sound to a more appropriate level and then raise it again for the feature, (this was also how we controlled lights, masking and shutdown automatically). The new digital projectors have no such function and so play everything at the same level. We do have many complaints the same as yours and apparently they are working on a fix.
In short, it's a pain in the arse...