Supplementary to Audible Alarms: VADs are specially productive in superior-sounds parts or wherever Listening to defense is worn, supplementing classic audible alarms. Installation in Significant-Noise Places: Put in Visible alarms in areas wherever noise degrees exceed 90 dB(A) or wherever hearing defense is commonly employed. We also discover the important https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/