Sound sensitivity is a very common problem for people with PCS, likely the most problematic.
The first thing you should do is download the TBI Survival Guide at
www.tbiguide.com Print it out in two copies (84 pages) and highlight the appropriate information so your family can pass around the other copy.
You can also have them watch the YouTube video series by John Byler called "You Look Great." at
http://www.youtube.com/watch?v=x9Xso...ature=youtu.be It is six episodes that take about an hour in total.
This will be the best way of informing them.
Have you tried noise canceling head phones like the Bose models? Your peace and quiet is important to healing.
The emotional outbursts are also very common. The only solution is to learn to quickly remove yourself from triggering situations. You will need to be rude with your quick escapes to avoid the explosions. At the first sensation of tightness in your neck and a rise in BP and heart rate, run to a quiet and safe location.
It would help if you can find a quiet place to spend your time. A library or any place that is quiet will help.
My best to you.