The police in the countryside thought we were horse thieves. Sometimes I can be sitting in a cramped dressing room or corridor perched between two dustbins. With actors in rehearsal I often work a nine hour day. Voices can be determined by class, age, education and the physicality of the speaker. Then I might go over a scene with a brother and sister or an aunt, uncle and niece.
Family voices have some similarities.
Phonetics did not exist when I was a drama student, but now it is one of the biggest aids to modern dialect work. I did manage to find one dear old lady with an excellent accent, but she was deaf and could not see my face very well to lip read. She shone the table light directly at me and it felt like I was getting the third degree. Derek Jacobi for his tremendous ability and his humility and Fiona Shaw because she has such guts. Acting, or perhaps try counselling.