Noise Control
Sections
Fan Selection for Acoustic Performance in Assembly Spaces
Technical guidance on selecting HVAC fans for low-noise applications including sound power calculations, fan type comparisons, speed optimization, and AMCA ratings.
HVAC Noise Contribution in Assembly Spaces
Technical analysis of HVAC system noise contributions in assembly spaces including component-level breakdowns, noise path analysis, budgeting methods, and design margins.
Noise Criteria for Performance Venues
Technical guidance on HVAC noise criteria (NC) curves for performance venues including concert halls (NC-20), theaters (NC-25), lecture halls (NC-30), and arenas (NC-35) with SPL calculations and design strategies.
HVAC Duct Silencers: Selection and Performance
Comprehensive guide to duct silencer types, insertion loss calculations, dynamic performance, pressure drop considerations, and selection criteria per ASHRAE standards.
NC-25 Theater HVAC Acoustic Design
Technical design requirements for achieving NC-25 acoustic performance in theaters including octave band limits, sound transmission calculations, audience size considerations, and HVAC system strategies.
NC-35 Arena HVAC: Large-Scale Acoustic Design
Technical guidance for achieving NC-35 noise criteria in sports arenas and multipurpose venues using high-capacity air handling, large-scale cooling systems, and acoustic control strategies.