Articles tagged “ductwork”
2 articles covering ductwork in acoustic engineering and building design.
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GUIDES13 min read
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.
March 18, 2026
HVAC noiseNC curve
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STANDARDS13 min read
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.
March 18, 2026
ASHRAEHVAC noise