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
Electrotechnical excellence, now open for entries.
Net zero electricity grids BSRIA guide NZG 5/2024
Outlining the changes needed to transition to net zero.
CIOB Global Student Challenge 2024
Universitas Indonesia wins for second year running.
New project and cultural district described in detail.
The nature of EPCs, crticism and inaccuracies.
History, issues and redesign.
From waste recycling to energy performance the hierchy.
An introduction to WERCS and WEEE responsibilities
Dealing with 2 million tonnes of waste equipment a year.
Global BACS Market: analytics and optimisation
A BSRIA glance at building automation and control systems.
What it is and how to use it.
Types of insulating plaster by binder and insulant.
Investors in People: CIOB achieves gold
Reflecting a commitment to employees and members.
Scratching beneath the surface; a guide to selection.
ECA 2024 Apprentice of the Year Award
Entries open for submission until May 31.
UK gov apprenticeship funding from April 2024
Brief summary the policy paper updated in March.
For the World Autism Awareness Month of April.