Micro-perforated panels for noise reduction
نویسندگان
چکیده
منابع مشابه
Micro-Perforated materials for the reduction of flow-induced noise
Turbulent Boundary Layer (TBL) induced noise is one of the dominant noise sources in modern aircraft, where classical materials are progressively being substituted by fiber-reinforced polymers. Although passive methods continue to be developed due to their straight realization in practical flight applications, they add additional weight and are also accompanied by some degradation in high-lift ...
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........................................................................................................................................... ii Acknowledgements ......................................................................................................................... iii Chapter 1 Introduction ...........................................................................................
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Theories of the acoustic impedance of micro perforated panels and membranes for normally incident waves have been well developed for decades. These theories are mainly based on the assumption that the particle velocity at the boundary of the hole wall is equal to zero. This assumption is valid when the panel/membrane is massive and does not vibrate. This paper aims to investigate the effects of...
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ژورنال
عنوان ژورنال: e & i Elektrotechnik und Informationstechnik
سال: 2021
ISSN: 0932-383X,1613-7620
DOI: 10.1007/s00502-021-00889-y