Dr Zzeus Q&A: How to estimate the likely ambient sound levels in different areas when designing a fire detection and alarm system in an unoccupied buildingQ: I’m designing a fire detection and alarm system from plans, but the building isn’t yet occupied. How do I estimate the likely ambient sound levels in the different areas? Does BS 5839-1:2025 provide any guidance? Yes. BS 5839-1:2025 Annex C provides typical occupational background noise levels for many common building types and areas. This ...The post Dr Zzeus Q&A: How to estimate the likely ambient sound levels in different areas when designing a fire detection and alarm system in an unoccupied building appeared first on Professional Electrician.