Articles tagged “background noise”
15 articles covering background noise in acoustic engineering and building design.
Buddhist Meditation Hall — Designing for Silence (Background Noise ≤ 25 dBA)
In a meditation hall, the goal isn't controlling sound — it's eliminating it. How to achieve BGN ≤ 25 dBA with timber construction.
Sound Masking Specification Guide — How to Write an Acoustic Masking Spec per ASTM E1130
A complete specification guide for sound masking systems in offices. Target levels, spectrum curves, speaker placement, and the ASTM E1130 framework.
How to Design an Acoustic Meeting Room That Passes WELL v2 First Time
A step-by-step acoustic design process for meeting rooms: size and volume, ceiling height, material selection, RT60 calculation, HVAC noise specification, and WELL v2 Feature 74 compliance verification. With worked example.
How to Pass WELL v2 Feature 74 Acoustics First Time — The 8-Step Process
73% of WELL F74 acoustic assessments fail Part 3 on first submission. This 8-step process prevents every common failure mode before assessment — from early-stage RT60 design through post-construction STI verification.
How to Read an Acoustic Report — What Every Architect Needs to Understand
Acoustic reports contain RT60 tables, octave band plots, compliance matrices, and STI data. Here is how to read each section, what the numbers mean, what 'pass' and 'fail' look like, and what to challenge if you disagree.
NC Curves Explained: Understanding NC-25, NC-35, NC-45 Background Noise Ratings
A comprehensive guide to Noise Criteria (NC) curves: how they work, how to determine an NC rating, target values for every room type, and the differences between NC, NR, and RC rating methods. Includes ASHRAE recommended levels and step-by-step calculation examples.
State of Office Acoustics 2026 — Data from 500 WELL Assessments
A comprehensive analysis of acoustic performance data from 500 WELL v2 assessments worldwide. Covers RT60 distributions, common failure modes in Feature 74, regional differences between UK, US, and Australia, and the trends reshaping office acoustics in 2026.
WELL AP Exam: Acoustic Questions Study Guide — Every Feature 74 Detail You Need to Know
Comprehensive study guide for WELL AP exam acoustic questions covering Feature 74 (Sound) Parts 1-3, RT60 thresholds, background noise criteria, STI calculations, and speech privacy requirements. Includes practice questions with explained answers.
Free WELL v2 Feature 74 Acoustic Calculator — Generate Your Compliance Report
Calculate WELL v2 Feature 74 acoustic compliance free. Parts 1, 2, and 3. RT60, background noise, and speech privacy (STI) checked simultaneously. Generate a WELL F74 compliance report in PDF format.
Noise Criteria Explained: NR, NC, and RC Curves — Which One Does Your Project Need?
NR (Noise Rating), NC (Noise Criteria), and RC (Room Criteria) all rate background noise levels in buildings — but they use different curves, different frequency ranges, and are required by different standards. Here is how each system works, when to use which, and the specific values your HVAC engineer needs to hit.
ANSI/ASA S12.60 Complete Guide: American Classroom Acoustics Standard
ANSI S12.60-2010 is the American standard for classroom acoustics, specifying maximum RT60 (0.6s), maximum background noise (35 dBA), and minimum STI (0.60). Here is every requirement explained with calculation examples, compliance methods, and how it compares to BB93 and DIN 18041.
BB93:2015 Complete Guide: UK School Acoustics Standard
Building Bulletin 93 (BB93:2015) sets the acoustic requirements for all school buildings in England and Wales. It specifies RT60 limits, background noise levels (BNL), and sound insulation — all mandatory under Building Regulations. Here is every requirement, room type, and compliance method.
WELL v2 Feature 74 (Sound) Complete Guide: Every Requirement, Threshold, and Compliance Path
WELL v2 Feature 74 has three parts: Sound Mapping (RT60), Sound Barriers (background noise), and Sound Masking (speech privacy/STI). Here is every threshold, every space type, every measurement condition, and the compliance pathway for each part — from precondition to optimization.
Open Plan Office Acoustic Design: The Complete Guide (WELL v2 | BS 8233 | ISO 3382)
The definitive guide to open plan office acoustics covering WELL v2 Sound features, BS 8233 targets, ISO 3382-3 open plan parameters, sound masking, and the ABC rule. Includes worked examples, compliance checklists, and cost analysis for 200-2000m² floor plates.
WELL v2 Feature 74 Decoded: Every Acoustic Requirement, Every Calculation, Every Clause
WELL Building Standard v2 Feature 74 has three parts with different requirements for RT60, background noise, and speech privacy. Most WELL assessors fail Part 3 because the speech privacy STI calculation is never written down in one place — until now.