Acoustic Design
Sections
Low-Velocity Air Distribution for Acoustic Control
Technical guidance on low-velocity HVAC design for assembly spaces including velocity-sound power relationships, duct sizing methodology, and noise reduction strategies.
Vibration Isolation for Assembly Space HVAC Equipment
Technical guidance on vibration isolation design for assembly spaces including transmissibility calculations, natural frequency requirements, isolator selection, and seismic coordination.
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.
HVAC Acoustic Considerations in Lecture Halls
Noise criteria, air velocity limits, duct-borne and structure-borne noise control, terminal unit selection, and equipment isolation for quiet auditoriums.
HVAC Acoustics in Classrooms
Technical guidance on HVAC noise control for classrooms per ANSI S12.60, including NC criteria, duct velocity limits, diffuser selection, and equipment placement strategies.
Sound Attenuation in HVAC Systems
Comprehensive guide to HVAC sound attenuation methods including duct lining, silencers, plenums, and distance attenuation with calculation formulas and design values.
NC 20 Noise Criteria for Concert Halls
Achieve NC 20 background noise in concert halls through low-velocity air systems, duct silencer design, equipment isolation, and comprehensive sound path analysis.
Noise Control in Engine Test Cells
Comprehensive noise control strategies for engine test facilities including acoustic design, HVAC system integration, worker protection, and community impact mitigation.