Supplementary to Audible Alarms: VADs are particularly efficient in high-noise regions or where by hearing safety is worn, supplementing classic audible alarms. Just click here for more information on the kinds of cookies we use and how to change your cookie settings. We also explore the important thought for people https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/