Well, I have met a couple of therapists (whose first degree were as psychologists) who spoke in a fairly artificial tone of voice - there are two different ones I'm thinking of, both female. My ex-T, who was also a psychologist before she became a psychotherapist, had a very natural mode of speaking, however. (She was from northern Sweden, which helped ;-) ) And my current T, whose first degree was in psychiatry, has a very nice voice and doesn't sound creepy or contrieved at all. He and I express ourselves in much the same way (to some extent I'm sure that's because he adjusts to me, but most of it is his natural way of speaking, I think.) And even if he had acquired some kind of learned therapy inflection he wouldn't have any use for it with me, since we're not speaking the language he went to university in!