Selection of Appropriate Porous Material for Designing and Developing Hybrid Absorptive Muffler: A Wave 1-D Based Approach

Year : 2025 | Volume : 13 | Special Issue 03 | Page : 148 160
    By

    Ravi Jatola,

  • Amit Kumar Gupta,

  1. Assistant Professor, Department of Mechanical Engineering, Shri Govindram Seksaria Institute of Technology & Science, Indore, Madhya Pradesh, India
  2. Associate Professor, Department of Mechanical Engineering, Institute of Engineering & Technology – Devi Ahilya Vishwavidyalaya, Indore, Madhya Pradesh, India

Abstract

In this study, glass wool and rock wool are used as sound-absorbing materials to assess the sound transmission loss (STL) of hybrid absorptive mufflers. Improving the muffler’s acoustic performance and assessing how well these materials attenuate noise are the main goals. Rock wool, which offers greater thermal resistance and broader frequency absorption, is contrasted with glass wool, which is renowned for its lightweight construction and high-frequency absorption. Wave 1-D simulation is used for the design and analysis of hybrid absorptive mufflers in a variety of configurations, including as an empty muffler, a perforated pipe with a single baffle, and a double-baffle system. To comprehend changes in STL, the impact of baffle positioning at the center and at 125 mm from both ends is investigated. Once the ideal muffler design has been determined, experimental testing is carried out to confirm the STL gains made possible by absorptive materials. Through the modification of muffler chambers with baffle plates, the study emphasizes the contribution of glass wool and rock wool to the reduction of vehicle exhaust noise. The effectiveness of these materials in hybrid muffler designs is demonstrated by a comparison of the empirically and numerically simulated STL values. The results optimize material selection for maximum acoustic performance, which advances noise reduction tactics in exhaust systems.

Keywords: Hybrid muffler, transmission losses, noise reduction, wave-1 D, acoustics

[This article belongs to Special Issue under section in Journal of Polymer and Composites (jopc)]

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How to cite this article:
Ravi Jatola, Amit Kumar Gupta. Selection of Appropriate Porous Material for Designing and Developing Hybrid Absorptive Muffler: A Wave 1-D Based Approach. Journal of Polymer and Composites. 2025; 13(03):148-160.
How to cite this URL:
Ravi Jatola, Amit Kumar Gupta. Selection of Appropriate Porous Material for Designing and Developing Hybrid Absorptive Muffler: A Wave 1-D Based Approach. Journal of Polymer and Composites. 2025; 13(03):148-160. Available from: https://journals.stmjournals.com/jopc/article=2025/view=209477


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Special Issue Subscription Original Research
Volume 13
Special Issue 03
Received 15/01/2025
Accepted 18/02/2025
Published 08/04/2025
Publication Time 83 Days
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