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.
| Published in | Mathematical Modelling and Applications (Volume 1, Issue 2) |
| DOI | 10.11648/j.mma.20160102.13 |
| 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), 2016. Published by Science Publishing Group |
Absorptive Muffler, Noise Transmission Loss, Sound Absorbing Material, Shell
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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
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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Download@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://article.sciencepublishinggroup.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}
}
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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