How to block noise at night but easily uncover windows during the day?

 How to block noise at night but easily uncover windows during the day?

I have not had a restful/unbroken night’s sleep since moving into a new apartment. Culprits are nonstop sirens all night long plus a crazy dude who walks by under our window screaming at his hallucinations at least three times per night. It’s been 6+ weeks an…

Super frustrated because we even took the precaution of visiting the neighborhood in the middle of the night to check the noise level before choosing this place and it seemed very quiet. But thanks t…