Analysis of Sound Transmission Loss in Hybrid Mufflers for Automotive Applications

Open Access

Year : 2024 | Volume : | : | Page : –

Ravi Jatola

Amit Kumar Guptab

  1. Assistant Professor Department of Mechanical Engineering, SGSITS, Indore Madhya Pradesh India
  2. Assistant Professor Department of Mechanical Engineering, IET-DAVV Madhya Pradesh India


An exhaust system’s noise level can be reduced with the use of a muffler. There is general recognition that baffled exhaust mufflers reduce noise emissions and increase the loss of sound transmission. The reduction of sound transmission can be further achieved by inserting sound-absorbing materials inside the muffler. Exhaust muffler systems with strategically positioned baffles have been shown to effectively reduce noise emissions, thereby improving acoustic performance. Baffles divert and disrupt sound waves, reducing the amount of unwanted noise that is transmitted and fostering a more peaceful and controlled acoustic environment. Sound-absorbing materials being included into mufflers is a major advancement in noise reduction technology. The current research purpose is to explore the changes in internal design of muffler with control volume influence towards the acoustic sound transmission loss. The design parameters were altered with constant volume and their variation was evaluated. In this work, by changing the number and position of the baffle, perforation percentage in the central and in outlet pipe. It has been seen that what is the difference in the sound transmission loss and finally, the sound transmission loss has been measured by filling the sound absorbing material into the constant volume muffler and observed how much the sound transmission loss has increased.

Keywords: 1-D analysis, Acoustics, Muffler, Sound Transmission Loss, Wave 1-D,

How to cite this article: Ravi Jatola, Amit Kumar Guptab. Analysis of Sound Transmission Loss in Hybrid Mufflers for Automotive Applications. Journal of Polymer and Composites. 2024; ():-.
How to cite this URL: Ravi Jatola, Amit Kumar Guptab. Analysis of Sound Transmission Loss in Hybrid Mufflers for Automotive Applications. Journal of Polymer and Composites. 2024; ():-. Available from:

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Ahead of Print Open Access Original Research
Received January 6, 2024
Accepted March 10, 2024
Published May 4, 2024