I know some people who work in telecommunications and need to have clear voices over the phone. According to them, one of their biggest difficulty is getting understood and understanding what the other person is saying over the phone especially if they have different local accents. Some of their colleagues would choose to undergo accent reduction courses so that they are at least sure that they are understandable. It has done wonders for some of them and a friend is thinking of enrolling herself in one too. I told her about Executive Language Training, a language school providing English and foreign business language training. Their language courses are customized to different learning styles and professional goals.