here in my city the noise ordinance is 10pm. during the day its standard for people to come and go in their apartment complexes, doors do get slammed, people do yell, laugh, play loud. as human beings we are a social species. its part of life not to go around whispering, tiptoeing playing music hardly loud enough to hear. some people even have out door activities where they play their boom boxes, stereos, IPads, cell phones with adaptable speakers so their friends and family can hear it too.

that said there are ways that I utilize when I come home from work and I dont want to hear the bustle and hubbub of city life and living in close proximity of central park, broadway shows, partying and general other human being going on with their lives...

headphones or just turn on my tv, radio, stereo, ....
ear plugs
camp out in the bathroom (ever notice most bathrooms have so many layers in their ways its relatively quiet in there, unless of course you have toddlers screaming outside the door with their faces trying to look under the door ...)
taking a relaxing bath or shower,
watch a movie with my cell phone or tv using headphones. (usually by the end of a 2 hour movie the noise level outside has decreased)

my point each person has their own coping tools for what will calm and relax them when under stressful situations.

suggestion maybe talking with your own treatment provider you and your treatment provider can prepare for the next time the noise level of others going about their lives affects you.