Visible Alarms: Use light to sign emergencies, In particular powerful in noisy settings and for the people with hearing impairments. Set up in High-Noise Places: Set up Visible alarms in parts where by sounds levels exceed 90 dB(A) or exactly where hearing safety is often utilised. Much better documentation and https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/