Articles tagged “NC curves”
4 articles covering NC curves in acoustic engineering and building design.
ASHRAE Noise Criteria for HVAC Systems: NC, RC, and Design Limits
Master ASHRAE HVAC noise criteria — NC curves, RC Mark II method, design limits by room type, duct noise calculation, and common specification errors.
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.
LEED AP: Acoustic Performance Credit Study Guide — EQ Credit Requirements Explained
Complete study guide for LEED v4.1 EQ acoustic performance credit covering NC curve requirements, STC/IIC thresholds, HVAC noise criteria, documentation evidence, and key differences from WELL. Includes practice questions with explained answers.
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.