Noise rating
BG 87/2024, Useful Information Guide, written by Chin Hang “Kay” Lam and published by BSRIA in 2024, defines noise rating (NR) as: ‘A criterion, often used in building specifications, for acceptable noise levels. A noise rating gives sound pressure levels (in decibels – dB) which must not be exceeded for a range of octave bands.’
'Noise ratings are a means of specifying acceptable indoor noise levels. Each noise rating (NR) curve gives sound pressure levels which must not be exceeded for a range of octave bands. This acknowledges that higher-frequency sound is considered more intrusive than lower-frequency sound. The graph below shows the maximum allowable sound pressure levels at each octave band for each noise rating. It also illustrates that for NR30, the maximum is 40 dB at 250 Hz, 34 dB at 500 Hz, and 30 dB at 1,000 Hz. Typical noise ratings for a variety of spaces can be found in BG 85 (BG 85/2024 Mechanical Criteria).'
--BSRIA
[edit] Related articles on Designing Buildings
Featured articles and news
Amendment to the GB Energy Bill welcomed by ECA
Move prevents nationally-owned energy company from investing in solar panels produced by modern slavery.
Gregor Harvie argues that AI is state-sanctioned theft of IP.
Heat pumps, vehicle chargers and heating appliances must be sold with smart functionality.
Experimental AI housing target help for councils
Experimental AI could help councils meet housing targets by digitising records.
New-style degrees set for reformed ARB accreditation
Following the ARB Tomorrow's Architects competency outcomes for Architects.
BSRIA Occupant Wellbeing survey BOW
Occupant satisfaction and wellbeing tool inc. physical environment, indoor facilities, functionality and accessibility.
Preserving, waterproofing and decorating buildings.
Many resources for visitors aswell as new features for members.
Using technology to empower communities
The Community data platform; capturing the DNA of a place and fostering participation, for better design.
Heat pump and wind turbine sound calculations for PDRs
MCS publish updated sound calculation standards for permitted development installations.
Homes England creates largest housing-led site in the North
Successful, 34 hectare land acquisition with the residential allocation now completed.
Scottish apprenticeship training proposals
General support although better accountability and transparency is sought.
The history of building regulations
A story of belated action in response to crisis.
Moisture, fire safety and emerging trends in living walls
How wet is your wall?
Current policy explained and newly published consultation by the UK and Welsh Governments.
British architecture 1919–39. Book review.
Conservation of listed prefabs in Moseley.
Energy industry calls for urgent reform.