Nearly 4 million people in France have suffered from ringing and whistling sounds in their ears, or 'tinnitus' to use the medical term. It is impossible to sleep, it is impossible to find silence. What are the causes and mechanics of these noises ? What are the therapeutic methods available to relieve the stress of tinnitus, and allow you to refind inner peace ? Martine Ohresser is an ear-throat-and-nose specialist and an otologist (a specialist in problems relating to hearing and balance). She is the founder of a centre for the functional exploration of hearing problems, in Paris.