Articles tagged “NC”
5 articles covering NC in acoustic engineering and building design.
Cinema & Theatre Acoustic Design: From Dialogue Clarity to Dolby Atmos
Technical guide to cinema and theatre acoustic design covering RT60 targets, NC criteria, dialogue intelligibility, surround sound requirements, Dolby Atmos certification, flanking noise control, and a case study of a Manchester multiplex with bowling alley flanking. Includes specification tables for THX and Dolby.
What is a Background Noise Survey?
A background noise survey measures ambient noise levels in octave bands to assess compliance with NC, NR, or RC criteria. Learn methodology, equipment, standards, and how results affect acoustic design.
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.
What is an NC Rating?
NC (Noise Criteria) is an octave-band rating system for background noise in buildings. Learn how NC curves work, how to read them, target values by room type, and how NC relates to NR and RC.
What is Noise? (Wanted vs Unwanted Sound)
Noise is unwanted sound that interferes with communication, concentration, or comfort. Learn how noise is measured, classified, and controlled in building acoustic design.