You know how you never factored in where you were gonna live when you go to college, and you end up having to live with 3 people in one bedroom who all have different schedules and like to leave the light on while talking even though you have an 8 am start the very next day? This helps. I connect this to my white noise app and I can finally block out the whispering and the lights every time my roommates open the door. Sweet relief.