Cedarhurst, I think this is more than just about the Kol Isha.
When you leave your house, you know you are going to be confronted with issues that don’t occur within your house. You are going to be exposed to improperly dressed women and kol isha and signs you wouldn’t want to see.
The question becomes how far you go to avoid these things? Do you only shop in Jewish stores? Do you only leave your house at night to minimize your views on the streets? Do you order everything online for delivery?
That is more of a hashkafic issue to discuss with your Rav than a pure halachic one I would think.