Supplementary to Audible Alarms: VADs are specially powerful in substantial-sound locations or where Listening to defense is worn, supplementing standard audible alarms. Jobs fall into the next types: video; pictures; artwork; interior style and design and architectural research; textile and clothing management; strategic communications and graphic layout; theatre; and an https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/