Microperforated panels (MPPs) are usually considered to be an alternative sound absorbing surface treatment in architectural acoustics applications, where they can serve as effective, fiber-free replacements for the more traditional glass fibers and other porous materials. However, the areas in which MPPs may be applied are not only limited to the replacement of conventional sound absorbing materials, but MPPs can also be used in spaces where more conventional materials cannot be conveniently used. For example, heating, ventilation, and air conditioning (HVAC) duct application is one area where MPPs can be used as a stand-alone material,in contrast with glass fiber, which typically must be covered by perforated surface treatments to prevent erosion of the fibers due to the flow. In this study, it will be shown how a suitably designed MPP can be an effective noise control element in ducts by reducing fan and flow noise while at the same time maintaining the flow delivery performance of the duct.
Microperforated materials, Acoustics, Ducts, Finite element modeling, Sound Transmission
Acoustics and Noise Control
Date of this Version
Seungkyu Lee; Thomas P. Hanschen; J. Stuart Bolton, “The application of microperforated panels in duct systems,” 173rd meeting of the Acoustical Society of America, June 2017, Boston MA. Paper 4pEA2, Session: Micro-Perforates (Invited by Mats Åbom). Abstract published in the Journal of the Acoustical Society of America 141(5), p. 3871, 2017.