Articles tagged “mechanical noise”
5 articles covering mechanical noise 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.
Background Noise Curves: NR, NC and RC Compared
Compare NR, NC, and RC background noise rating methods with worked examples showing which curve to specify for HVAC noise control in offices, studios, and hospitals.
What is HVAC Noise? Controlling Mechanical System Sound in Buildings
HVAC noise is unwanted sound from heating, ventilation, and air conditioning systems. Learn noise generation mechanisms, NC/NR criteria, duct attenuation, and practical control strategies.
HVAC Noise Control — The Ductwork Mistake Ruining Your NC 30 Spec | AcousPlan
HVAC duct velocity above 5 m/s generates noise proportional to V⁵. NC curve calculation chain with ASHRAE method. 5 noise sources, 1 worked example.
ASHRAE HVAC Noise Control: Handbook Chapter Summary for Acoustic Designers
ASHRAE HVAC Applications Chapter 49 is the authoritative guide for mechanical noise control in buildings. This summary covers RC/NC curve criteria, duct noise calculation, equipment selection, and silencer design for acoustic designers.