Let's not brick up the windows; I love the sight of my little garden every morning from my room!
My room has some distance to the streets and other houses thanks to the garden. I don't think the neighbors or anyone passing by will hear loud noises from the house, but I want to prevent all kinds of complaints. Does it mean that a thick foam can block sound as good as a solid panel? Foams may be better aesthetically, but I'm not sure if it's worth investing in some.