I have a tendency to raise my voice, which sounds better than saying "shout or yell", when I'm angry. Now, my wife, who has a sensitive personality, and, at times "overly" one, so when she gets angry, she can raise her voice and cry as well. Thank God, I'm able to calm her down and tell her "I'm sorry, I love you", if I create the anger she gets.
Since my working environments have been pretty different than hers, I have a tendency to raise my voice over a tv, A/C and other loud things around me. My wife hasn't worked around machinery, forklifts or in other loud places.
She doesn't like confrontation, if she can help it, but confrontation doesn't bother me. However, I do know who, and who not to, confront.