Supplementary to Audible Alarms: VADs are significantly productive in large-noise parts or in which hearing defense is worn, supplementing standard audible alarms. Initiatives drop into the following types: movie; photography; artwork; interior style and architectural studies; textile and clothing management; strategic communications and graphic design; theatre; and an open up https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/