- Author
- Choppen, B.
- Title
- Questions of Sound and Light.
- Journal
- International Fire Protection (IFP) Magazine, No. 18, 13-16, May 2004
- Keywords
- noise (sound) | fire alarm systems | warning systems | evacuation
- Identifiers
- sounders; sounder types: wall sounders and base sounders; addressable sounders; power; beacons