Abstract: The invention relates to a sound diffusion system embedded in a railway vehicle and comprising: a plurality of groups of speakers distributed in the cars, each group of speakers being located in a respective diffusion zone of the railway vehicle; a control device of the speakers configured to broadcast generic sound signals via the different groups of speakers; and at least one reception device, each reception device being associated with a single group of speakers and being able to receive a control signal from a control device outside the railway vehicle, the control device being configured, upon reception of a control signal by one of the reception devices, to broadcast a specific sound signal solely via the associated group of speakers.