This is getting ridiculous day by day Squires. A few days ago you were suggesting exercise and now custom tuned window tweaks? What you really need is a custom tuned speaker. The speakers are usually the weakest link. Not the windows I'm afraid.
Custom Window Sound Blockers
I was today years old when I realized they made press-in sound blocking solutions for windows. I have never heard them so I need a well-heeled guinea pig from A'gon to please try them out and report back.