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.


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    Titel :

    Acoustical Study of Micro- Perforated Plates for Vehicle Applications


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Åbom, Mats (Autor:in) / Allam, Sabry (Autor:in) / Guo, Ying (Autor:in)

    Kongress:

    SAE 2009 Noise and Vibration Conference and Exhibition ; 2009



    Erscheinungsdatum :

    19.05.2009




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


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    Dissipative Silencers Based on Micro-Perforated Plates

    Abom, M. / Allam, S. / Society of Automotive Engineers | British Library Conference Proceedings | 2013


    Development of micro-perforated acoustic elements for vehicle applications

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


    Acoustical transparency of perforated panels with fabric linings

    Leistner, M. / Drotleff, H. | British Library Conference Proceedings | 2004


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

    Tian, X. / Yu, W. / Wentzel, R.E. et al. | British Library Conference Proceedings | 2013