1. A comprehensive review of advances and techniques in muffler acoustics and design.
- Author
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Haghighi, M., Mirzaei, R., Putra, A., and Taban, E.
- Abstract
This article presents a comprehensive overview of the various types of mufflers that researchers have studied based on their acoustic performance. Mufflers are a crucial component in noise control to minimize the noise generated by various machines such as internal combustion engines, fans, and other sources that include gas flow. They leverage a combination of resonance, absorption, reflection, and expansion principles to mitigate sound waves. The effectiveness of mufflers in reducing noise pollution is evaluated based on certain parameters, notably transmission loss (TL), insertion loss (IL), and noise reduction (NR). TL serves as an essential parameter to evaluate the acoustic efficiency of mufflers and is widely used by scholars. It is calculated as the difference in sound power at both ends of the muffler in the absence of energy reflecting back to the pipe. Although this measure is easy to compute, it is difficult to obtain accurate measurements. Generally speaking, mufflers play a pivotal role in lowering noise emanating from a vehicle's exhaust system, and they conform to the prevailing noise pollution standards. Consequently, muffler designers aim not only to minimize noise emissions but also to satisfy customer demands. This article examines the design criteria used for mufflers so that researchers can utilize this information to achieve the optimal muffler design. This study reviews various muffler types, including expansion mufflers with circular, elliptical, and polygonal/rectangular cross-sections, mufflers with inlet/outlet pipes with non- perforated extensions, mufflers with inlet/outlet pipes with perforated extensions, multi-chambered mufflers, mufflers with three-pass perforated pipes, mufflers with microperforated plates, plug mufflers, and mufflers with U-shaped pipes (corrugated). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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