Supplementary to Audible Alarms: VADs are especially productive in higher-sound areas or the place Listening to protection is worn, supplementing classic audible alarms. Initiatives drop into the following types: video; images; art; interior style and design and architectural reports; textile and apparel administration; strategic communications and graphic layout; theatre; and https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/