Title: Employing the micro-perforated panel in the vehicle cabin: Is this possible?
Abstract:The micro-perforated panel (MPP) has been developed as a sound absorber which replaces the classical synthetic
fibrous material. Known as the ‘hygenic’ acoustic material, its optical surface also ma...The micro-perforated panel (MPP) has been developed as a sound absorber which replaces the classical synthetic
fibrous material. Known as the ‘hygenic’ acoustic material, its optical surface also makes it attractive enhancing
the art of a room interior. This paper discusses the possibility to apply the MPP which substitutes the solid panel
at the inner side on the double-leaf partition of vehicle structures to control sound absorption in the vehicle cabin.
Having known as an important part of modern lightweight structures such as aircraft fuselages, train walls, car
doors, windows and lightweight partition walls in buildings, the double-leaf partition has poor noise insulation at
low frequencies due to the coupling between the partition masses and the air between them. The presence of the
micro holes adds additional damping which breaches this coupling and increases the sound transmission loss.
This can be controlled by tuning the properties of the MPP, i.e. the hole diameter, the perforation ratio and the
cavity gap. The solid-MPP (SMPP) system therefore provides double functions simulatenously, i.e. as sound
absorber and noise barrier. Derivation of the mathematical model for the transmission loss of the SMPP subjected
to oblique and diffuse field incidence of acoustic loading is presented.Read More
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot