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Optimization of internal geometry for maximum transmission loss in a reactive muffler.

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Title: Optimization of internal geometry for maximum transmission loss in a reactive muffler.
Authors: Kulkarni, Shravani1 (AUTHOR), Kulkarni, Mahesh1 (AUTHOR) mahesh.kulkarni@mitwpu.edu.in
Source: Building Acoustics. Mar2026, Vol. 33 Issue 1, p45-66. 22p.
Subjects: Automobile mufflers, Sound-wave attenuation, Noise control, Automobile noise, Soundproofing, Simulation software, Taguchi methods, Finite element method
Abstract: Noise pollution from internal combustion engines in vehicles and industrial equipment poses an environmental challenge. Exhaust systems use mufflers to reduce noise by attenuating sound waves. This study focuses on optimizing the extended inlet length and diameter in a reactive muffler with a single expansion chamber and extended sections. The aim is to enhance transmission loss in a targeted frequency range for better noise reduction. Using the Taguchi Method, the study identified optimal design parameters for sound attenuation. Acoustic performance was assessed through two methods: (1) numerical simulations using COMSOL Multiphysics and the Finite Element Method (FEM) to analyze sound wave behavior, and (2) experimental validation via the two-load method to measure transmission loss in a prototype. Results highlight key design insights for optimizing reactive mufflers, offering a robust framework for achieving superior noise control in applications requiring frequency-specific attenuation. [ABSTRACT FROM AUTHOR]
Copyright of Building Acoustics is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 191630948
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PubType: Academic Journal
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  Data: Optimization of internal geometry for maximum transmission loss in a reactive muffler.
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  Data: <searchLink fieldCode="AR" term="%22Kulkarni%2C+Shravani%22">Kulkarni, Shravani</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kulkarni%2C+Mahesh%22">Kulkarni, Mahesh</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mahesh.kulkarni@mitwpu.edu.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Building+Acoustics%22">Building Acoustics</searchLink>. Mar2026, Vol. 33 Issue 1, p45-66. 22p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Automobile+mufflers%22">Automobile mufflers</searchLink><br /><searchLink fieldCode="DE" term="%22Sound-wave+attenuation%22">Sound-wave attenuation</searchLink><br /><searchLink fieldCode="DE" term="%22Noise+control%22">Noise control</searchLink><br /><searchLink fieldCode="DE" term="%22Automobile+noise%22">Automobile noise</searchLink><br /><searchLink fieldCode="DE" term="%22Soundproofing%22">Soundproofing</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+software%22">Simulation software</searchLink><br /><searchLink fieldCode="DE" term="%22Taguchi+methods%22">Taguchi methods</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Noise pollution from internal combustion engines in vehicles and industrial equipment poses an environmental challenge. Exhaust systems use mufflers to reduce noise by attenuating sound waves. This study focuses on optimizing the extended inlet length and diameter in a reactive muffler with a single expansion chamber and extended sections. The aim is to enhance transmission loss in a targeted frequency range for better noise reduction. Using the Taguchi Method, the study identified optimal design parameters for sound attenuation. Acoustic performance was assessed through two methods: (1) numerical simulations using COMSOL Multiphysics and the Finite Element Method (FEM) to analyze sound wave behavior, and (2) experimental validation via the two-load method to measure transmission loss in a prototype. Results highlight key design insights for optimizing reactive mufflers, offering a robust framework for achieving superior noise control in applications requiring frequency-specific attenuation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Building Acoustics is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1177/1351010X251389683
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 22
        StartPage: 45
    Subjects:
      – SubjectFull: Automobile mufflers
        Type: general
      – SubjectFull: Sound-wave attenuation
        Type: general
      – SubjectFull: Noise control
        Type: general
      – SubjectFull: Automobile noise
        Type: general
      – SubjectFull: Soundproofing
        Type: general
      – SubjectFull: Simulation software
        Type: general
      – SubjectFull: Taguchi methods
        Type: general
      – SubjectFull: Finite element method
        Type: general
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      – TitleFull: Optimization of internal geometry for maximum transmission loss in a reactive muffler.
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            NameFull: Kulkarni, Shravani
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            NameFull: Kulkarni, Mahesh
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          Dates:
            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 33
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            – TitleFull: Building Acoustics
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