Supplementary to Audible Alarms: VADs are particularly helpful in significant-sound places or exactly where Listening to defense is worn, supplementing standard audible alarms. Jobs drop into the next types: video; photography; art; inside style and design and architectural studies; textile and apparel management; strategic communications and graphic layout; theatre; and https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/