We live in a 1917 historic home with original windows on a VERY busy street with gravel trucks passing from 5:00 am to 6:00 pm every day. One can’t even stand on our front porch and hear another person talking at times. And, unfortunately, our bedroom is on the front of the house. The Indow windows are truly a miracle! We can now sleep without a sound machine to drown out the trucks.
I HIGHLY recommend Indow for acoustic situations!