For people who are blessed with a melodious voice, maintaining and improving it is definitely a huge responsibility. You voice is necessary for communication purposes, and toning it is a good way of maintaining it. You may have an ambition to sing or to offer your voice for other professions, there is always a need to polish it and make it sound audible. When you go for auditions which are related to your voice, you are judged on its quality, sharpness and melody.