I went and bought a noise cancelling headset for work, so when I am transcribing (at least digital, because my headset isn't compatible with my other transcriber at the moment) I can take down the countless little noises. It has been great! It takes the edge off, I can finally escape even at my desk. Even without the technology switched on my headset blocks out considerable amounts of noises (still can hear conversation, but it is far off in the distance). It doesn't take down the screeching fussy kids, but it does cool the more vicious parts of the screams - its actually tolerable. It does hiss but it is actually a fairly soothing hiss, and I can turn down the volume on my transcriber quite a bit.
It would be nicer if they were a little lighter because they can make the top of my ear a little sore if they are sitting wrong, but hopefully I will get used to that. It would have been nice if I could have tried them on before purchase, but they have them all sealed tightly in blister packs.
What would be nice is the ability to pipe in maybe something soothing of a sound while I am proof reading to wash over the little spikes in conversation.
My coworkers haven't gotten used to it yet - they won't let me get the headphones off before they start talking to me, but that will come with time, I wager. Hopefully the loud patients take a hint too - my desk is right across from one of the main desks, so sometimes patients raise their voice as so to include me in the conversation (which is something people do, admittedly). Thing is, I don't WANT to hear them...
Wouldn't mind blinders so I can block out visual chaos in the periphery but that might be pushing it. 
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People think there are four elements to the world; fire, wind, water and earth. They are wrong. There is a 5th element - surprise. - paraphrasing of Terry Pratchett "The Truth"