Mathematical Modelling and Applications

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Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers

Received: 27 August 2016    Accepted: 02 November 2016    Published: 25 November 2016
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Abstract

The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.

DOI 10.11648/j.mma.20160102.13
Published in Mathematical Modelling and Applications (Volume 1, Issue 2, December 2016)
Page(s) 46-54
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Absorptive Muffler, Noise Transmission Loss, Sound Absorbing Material, Shell

References
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[14] Herrin, D. W., Hua, X., Zhang, Y., Elnady, T., The Proper Use of Plane Wave Models for Muffler Design, SAE Int. J. Passeng. Cars - Mech. Syst., 7 (3), 927-932, 2014.
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Author Information
  • Mechanical Engineering Department, Yildirim Beyazit University, Ankara, Turkey

  • Mechanical Engineering Department, Eastern Mediterranean University, Gazimagusa, Turkey

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  • APA Style

    Mostafa Ranjbar, Maryam Alinaghi. (2016). Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Mathematical Modelling and Applications, 1(2), 46-54. https://doi.org/10.11648/j.mma.20160102.13

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    ACS Style

    Mostafa Ranjbar; Maryam Alinaghi. Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Math. Model. Appl. 2016, 1(2), 46-54. doi: 10.11648/j.mma.20160102.13

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    AMA Style

    Mostafa Ranjbar, Maryam Alinaghi. Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers. Math Model Appl. 2016;1(2):46-54. doi: 10.11648/j.mma.20160102.13

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  • @article{10.11648/j.mma.20160102.13,
      author = {Mostafa Ranjbar and Maryam Alinaghi},
      title = {Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers},
      journal = {Mathematical Modelling and Applications},
      volume = {1},
      number = {2},
      pages = {46-54},
      doi = {10.11648/j.mma.20160102.13},
      url = {https://doi.org/10.11648/j.mma.20160102.13},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.mma.20160102.13},
      abstract = {The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Effect of Liner Layer Properties on Noise Transmission Loss in Absorptive Mufflers
    AU  - Mostafa Ranjbar
    AU  - Maryam Alinaghi
    Y1  - 2016/11/25
    PY  - 2016
    N1  - https://doi.org/10.11648/j.mma.20160102.13
    DO  - 10.11648/j.mma.20160102.13
    T2  - Mathematical Modelling and Applications
    JF  - Mathematical Modelling and Applications
    JO  - Mathematical Modelling and Applications
    SP  - 46
    EP  - 54
    PB  - Science Publishing Group
    SN  - 2575-1794
    UR  - https://doi.org/10.11648/j.mma.20160102.13
    AB  - The reduction of the emitted noise pollution from the exhaust system of engines is a real challenge for various industries. At this regard, mufflers have been used to reduce the transmitted noise from the engine of vehicles into the surrounding environment. Mufflers are designed to reflect the sound waves produced by the engine in such a way that they partially cancel themselves out. Noise transmission loss performance in muffler depends on its geometry. Therefore, maximization of noise transmission loss in mufflers using shape modification concept is an important research area. In this paper research, maximization of noise transmission in mufflers is studied and investigated. A model is developed to present the absorptive muffler. The muffler structure and its sound absorbing layer are modeled using shells elements. This model analyzes the muffler structure which has effects on the transmission loss (TL). The results are compared to a model without any absorbing layer. It indicates that the thickness and material type of absorbing layer have distinctive effects on the amount of noise transmission loss of muffler over a wide frequency range.
    VL  - 1
    IS  - 2
    ER  - 

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