Acta Mechanica

, Volume 230, Issue 3, pp 965–977 | Cite as

Sound transmission through triple plates separated by air cavities in the low-frequency range

  • Akintoye Olumide OyeladeEmail author
  • Obanishola Mufutau Sadiq
  • Omotayo A.  Fakinlede
Original Paper


A theoretical study of sound transmission in rigid duct through clamped triple plates separated by two impervious air cavities is formulated. The vibrating motion of the plates and the sound pressure field are expanded in terms of an infinite series of the modal functions. The accuracy of the theoretical predictions is first checked against experimental and numerical results, with good agreement achieved. The model predictions are then used to explore the influence of key parameters on the sound isolation capability of the triple-plate configuration, including the thickness of the plates and that of the air cavities. Furthermore, the sound transmission loss (STL) of the triple-plate model is compared with that of a double plate. Results showed that replacing the double plates with three plates while keeping the air cavity gaps between the plates the same degrades the STL in the low-frequency range. However, using the triple plates is more suitable to enhance the sound insulation performance when enough space is available.


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The authors appreciate the Micromechanics Research Group in the Department ofMechanics of the Beijing Institute of Technology under the leadership of Professor Gengkai Hu, for their support in conducting this research study.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  • Akintoye Olumide Oyelade
    • 1
    Email author
  • Obanishola Mufutau Sadiq
    • 1
  • Omotayo A.  Fakinlede
    • 2
  1. 1.Department of Civil and Environmental Engineering, Faculty of EngineeringUniversity of LagosLagosNigeria
  2. 2.Department of Systems Engineering, Faculty of EngineeringUniversity of LagosLagosNigeria

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