Durham School of Architectural Engineering and Construction


Date of this Version



Published in Building Integration Solutions, ed. Mohammed Ettouney, P.E., Proceedings Of The 2006 Architectural Engineering National Conference, March 29.April 1, 2006, Omaha, Nebraska. Sponsored By The Architectural Engineering Institute (AEI) of the American Society of Civil Engineers. Reston, VA: ASCE, 978-0-7844-0798-1 or 0-7844-0798-3, 2006.


This paper discusses issues regarding in-situ methods of obtaining sound power at a point in a heating, ventilating and air-conditioning (HVAC) duct system. Such a method is being used as part of a larger investigation on acoustical prediction methods to allow for comparison of measured data to results from attenuation predictions of individual duct elements, such as elbows or dampers. Sound propagation in HVAC duct work is complex. Any measurements of sound energy in the duct must address the characteristics of sound propagation in ducts, end reflections, and air turbulence. Investigations are being conducted to understand the extents to which these acoustical issues affect measurement results. The study provides a better understanding of sound propagation in HVAC ducts for future investigation of acoustical prediction methods.