Supplementary to Audible Alarms: VADs are significantly successful in significant-noise regions or where by hearing defense is worn, supplementing common audible alarms. To be able to stay away from discrimination, BS EN 54-23 compliant VADs could be set up in all sanitary accommodation (not simply WCs) and all resort bedrooms, https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/