Micro-perforated plate (MPP) absorbers are perforated plates with holes typically in the sub mm range and perforation ratios around 1%. The values are typical for applications in air at standard temperature and pressure (STP). The underlying acoustic principle is simple, it is to create a surface with a built in damping which effectively absorbs sound waves. To achieve this, the acoustic impedance of a MPP absorber is normally tuned to be of the order of the characteristic wave impedance in the medium (~ 400 Pa*s/m in air at STP). The traditional application for MPP absorbers has been building acoustics often combined with a so called panel absorber, to create an absorption peak at a selected frequency. However, MPP absorbers made of metal could also be used for noise control close to or at the source in many vehicle applications.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Acoustical Study of Micro- Perforated Plates for Vehicle Applications


    Additional title:

    Sae Technical Papers


    Contributors:
    Åbom, Mats (author) / Allam, Sabry (author) / Guo, Ying (author)

    Conference:

    SAE 2009 Noise and Vibration Conference and Exhibition ; 2009



    Publication date :

    2009-05-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English


    Keywords :


    Dissipative Silencers Based on Micro-Perforated Plates

    Abom, Mats / Allam, Sabry | SAE Technical Papers | 2013


    Development of micro-perforated acoustic elements for vehicle applications

    Ducret, Fabrice / Jacobsen, Finn / Abom, Mats | Tema Archive | 2005


    Calculation of Acoustical Characteristics of the Sound Insulation Pad by Micro Perforated Membrane Theory

    Zhu, Keda / Wentzel, Richard E. / Huang, Wei et al. | SAE Technical Papers | 2013


    Homogenisation of perforated plates

    Naqvi, Shiza / Ayton, Lorna J. | AIAA | 2022


    Homogenisation of Perforated Plates

    Naqvi, Shiza / Ayton, Lorna J. | British Library Conference Proceedings | 2022