Not hearing the phone ringing, someone knocking on the door or worse, the fire alarm, all these everyday noises, which seem commonplace, represent a real challenge for part of the population. This is why a group of students in their last year of a Master's degree, as part of an entrepreneurial project, wanted to find a solution. I was asked to help them create an IoT solution for these deaf and hearing impaired people whose daily life in their home is difficult.