Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel

Antonio Petosic; Sanja Grubesa; Mia Suhanek; Ivan Djurek

doi:doi:10.11648/j.eas.20180303.14

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Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel

Antonio Petosic, Sanja Grubesa, Mia Suhanek, Ivan Djurek

Published in Engineering and Applied Sciences (Volume 3, Issue 3)

Received: 27 August 2018 Accepted: 7 September 2018 Published: 27 October 2018

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Abstract

Serious noise pollution is one of the most unwanted consequences of the rapid urbanization and industrialization and various studies have shown that long exposure to noise can result in different health issues. Therefore, the performance of large industrial baffled silencer is crucial for reducing the environmental noise from large industrial plants. In this particular research the acoustic parameters of several different configurations of parallel baffled silencers have been compared by using an in-situ measurement method according to the ISO-11820:1996 Standard. The geometrical parameters e.g. length, thickness and distance between baffles as well as the absorption parameters of baffles have been changed in terms of full absorption and half-absorption surface. Furthermore, their influence on the silencer performance in channel with and without flow has been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-situ measurement setup including the influence of the reflections from baffles at the inlet side and opening at the outlet side. Moreover, the analytical expression (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration has been compared with the measurement values on octave bands of interest. Additionally, the sound pressure distribution between baffles has also been measured and it can be concluded that the sound pressure level change is much larger at the beginning when compared to the value at the end of a silencer.

Published in	Engineering and Applied Sciences (Volume 3, Issue 3)
DOI	10.11648/j.eas.20180303.14
Page(s)	88-96
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), 2018. Published by Science Publishing Group

Keywords

Parallel Baffled Silencers, Insertion Loss, Transmission Loss, Artificial Sound Source, Real Sound Source

References

[1]	EN ISO 11820:1996, Acoustics- measurement of silencers in situ.
[2]	ISO 7235-2003, EN ISO 7235:2009 Acoustics -- Laboratory measurement procedures for ducted silencers and air-terminal units -- Insertion loss, flow noise and total pressure loss.
[3]	F. P. Mechel: Theory of baffle-type silencers. Acustica 70 (1990) 93-111.
[4]	H. V. Fuchs: Schallabsorber und Schalldämpfer, Springer Verlag, 2010.
[5]	M. L. Munjal: Acoustics of Ducts and Mufflers, 2nd Edition, 2014.
[6]	David A. Bies, Colin H. Hansen: Engineering Noise Control: Theory and Practice, Fourth Edition, 2009.
[7]	F. P. Mechel: Numerical results to the theory of baffle type silencers. Acustica 72 (1990) 7-20.
[8]	A. Cummings and N. Sormaz: Acoustic attenuation in dissipative splitter silencers containing mean fluid flow. Journal of Sound and Vibration 168 (1993) 209-227.
[9]	R. Kirby: The influence of baffle fairings on the acoustic performance of rectangular splitter silencers. J. Acoust. Soc. Am. 118 (2005) 2302-2312.
[10]	R. Binois, E. Perrey-Debain, N. Dauchez, Benoit Nennig, J.-M. Ville, et al.: On the eﬃciency of parallel baﬄe-type silencers in rectangular ducts: prediction and measurement. Acta Acustica united with Acustica, Hirzel Verlag, 2015, 101, pp. 520-530.
[11]	Helmut V. Fuchs: Grundlagen der SchalldämpferauslegungTeil 1: Vereinfachte Formeln für sichere Dimensionierung, IKZ-FACHPLANER Heft12/2007.
[12]	VDI 2081:2001, Blatt1, Blatt2, Noise generation and noise reduction in air conditioning systems.
[13]	ISO 3744:2011, Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Engineering methods for an essentially free field over a reflecting plane.

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APA Style

Antonio Petosic, Sanja Grubesa, Mia Suhanek, Ivan Djurek. (2018). Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Engineering and Applied Sciences, 3(3), 88-96. https://doi.org/10.11648/j.eas.20180303.14

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ACS Style

Antonio Petosic; Sanja Grubesa; Mia Suhanek; Ivan Djurek. Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Eng. Appl. Sci. 2018, 3(3), 88-96. doi: 10.11648/j.eas.20180303.14

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AMA Style

Antonio Petosic, Sanja Grubesa, Mia Suhanek, Ivan Djurek. Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Eng Appl Sci. 2018;3(3):88-96. doi: 10.11648/j.eas.20180303.14

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@article{10.11648/j.eas.20180303.14,
  author = {Antonio Petosic and Sanja Grubesa and Mia Suhanek and Ivan Djurek},
  title = {Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel},
  journal = {Engineering and Applied Sciences},
  volume = {3},
  number = {3},
  pages = {88-96},
  doi = {10.11648/j.eas.20180303.14},
  url = {https://doi.org/10.11648/j.eas.20180303.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.eas.20180303.14},
  abstract = {Serious noise pollution is one of the most unwanted consequences of the rapid urbanization and industrialization and various studies have shown that long exposure to noise can result in different health issues. Therefore, the performance of large industrial baffled silencer is crucial for reducing the environmental noise from large industrial plants. In this particular research the acoustic parameters of several different configurations of parallel baffled silencers have been compared by using an in-situ measurement method according to the ISO-11820:1996 Standard. The geometrical parameters e.g. length, thickness and distance between baffles as well as the absorption parameters of baffles have been changed in terms of full absorption and half-absorption surface. Furthermore, their influence on the silencer performance in channel with and without flow has been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-situ measurement setup including the influence of the reflections from baffles at the inlet side and opening at the outlet side. Moreover, the analytical expression (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration has been compared with the measurement values on octave bands of interest. Additionally, the sound pressure distribution between baffles has also been measured and it can be concluded that the sound pressure level change is much larger at the beginning when compared to the value at the end of a silencer.},
 year = {2018}
}

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TY  - JOUR
T1  - Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel
AU  - Antonio Petosic
AU  - Sanja Grubesa
AU  - Mia Suhanek
AU  - Ivan Djurek
Y1  - 2018/10/27
PY  - 2018
N1  - https://doi.org/10.11648/j.eas.20180303.14
DO  - 10.11648/j.eas.20180303.14
T2  - Engineering and Applied Sciences
JF  - Engineering and Applied Sciences
JO  - Engineering and Applied Sciences
SP  - 88
EP  - 96
PB  - Science Publishing Group
SN  - 2575-1468
UR  - https://doi.org/10.11648/j.eas.20180303.14
AB  - Serious noise pollution is one of the most unwanted consequences of the rapid urbanization and industrialization and various studies have shown that long exposure to noise can result in different health issues. Therefore, the performance of large industrial baffled silencer is crucial for reducing the environmental noise from large industrial plants. In this particular research the acoustic parameters of several different configurations of parallel baffled silencers have been compared by using an in-situ measurement method according to the ISO-11820:1996 Standard. The geometrical parameters e.g. length, thickness and distance between baffles as well as the absorption parameters of baffles have been changed in terms of full absorption and half-absorption surface. Furthermore, their influence on the silencer performance in channel with and without flow has been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-situ measurement setup including the influence of the reflections from baffles at the inlet side and opening at the outlet side. Moreover, the analytical expression (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration has been compared with the measurement values on octave bands of interest. Additionally, the sound pressure distribution between baffles has also been measured and it can be concluded that the sound pressure level change is much larger at the beginning when compared to the value at the end of a silencer.
VL  - 3
IS  - 3
ER  -

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Author Information

Antonio Petosic

Department of Electroacoustics, Faculty of EE and Computing, University of Zagreb, Zagreb, Croatia
Sanja Grubesa

Department of Electroacoustics, Faculty of EE and Computing, University of Zagreb, Zagreb, Croatia
Mia Suhanek

Department of Electroacoustics, Faculty of EE and Computing, University of Zagreb, Zagreb, Croatia
Ivan Djurek

Department of Electroacoustics, Faculty of EE and Computing, University of Zagreb, Zagreb, Croatia

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Plain Text BibTeX RIS

APA Style

Antonio Petosic, Sanja Grubesa, Mia Suhanek, Ivan Djurek. (2018). Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Engineering and Applied Sciences, 3(3), 88-96. https://doi.org/10.11648/j.eas.20180303.14

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ACS Style

Antonio Petosic; Sanja Grubesa; Mia Suhanek; Ivan Djurek. Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Eng. Appl. Sci. 2018, 3(3), 88-96. doi: 10.11648/j.eas.20180303.14

Copy | Download

AMA Style

Antonio Petosic, Sanja Grubesa, Mia Suhanek, Ivan Djurek. Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel. Eng Appl Sci. 2018;3(3):88-96. doi: 10.11648/j.eas.20180303.14

Copy | Download

@article{10.11648/j.eas.20180303.14,
  author = {Antonio Petosic and Sanja Grubesa and Mia Suhanek and Ivan Djurek},
  title = {Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel},
  journal = {Engineering and Applied Sciences},
  volume = {3},
  number = {3},
  pages = {88-96},
  doi = {10.11648/j.eas.20180303.14},
  url = {https://doi.org/10.11648/j.eas.20180303.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.eas.20180303.14},
  abstract = {Serious noise pollution is one of the most unwanted consequences of the rapid urbanization and industrialization and various studies have shown that long exposure to noise can result in different health issues. Therefore, the performance of large industrial baffled silencer is crucial for reducing the environmental noise from large industrial plants. In this particular research the acoustic parameters of several different configurations of parallel baffled silencers have been compared by using an in-situ measurement method according to the ISO-11820:1996 Standard. The geometrical parameters e.g. length, thickness and distance between baffles as well as the absorption parameters of baffles have been changed in terms of full absorption and half-absorption surface. Furthermore, their influence on the silencer performance in channel with and without flow has been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-situ measurement setup including the influence of the reflections from baffles at the inlet side and opening at the outlet side. Moreover, the analytical expression (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration has been compared with the measurement values on octave bands of interest. Additionally, the sound pressure distribution between baffles has also been measured and it can be concluded that the sound pressure level change is much larger at the beginning when compared to the value at the end of a silencer.},
 year = {2018}
}

Copy | Download

TY  - JOUR
T1  - Acoustic Performance of Parallel Baffled Silencers Different Configurations in HVAC Channel
AU  - Antonio Petosic
AU  - Sanja Grubesa
AU  - Mia Suhanek
AU  - Ivan Djurek
Y1  - 2018/10/27
PY  - 2018
N1  - https://doi.org/10.11648/j.eas.20180303.14
DO  - 10.11648/j.eas.20180303.14
T2  - Engineering and Applied Sciences
JF  - Engineering and Applied Sciences
JO  - Engineering and Applied Sciences
SP  - 88
EP  - 96
PB  - Science Publishing Group
SN  - 2575-1468
UR  - https://doi.org/10.11648/j.eas.20180303.14
AB  - Serious noise pollution is one of the most unwanted consequences of the rapid urbanization and industrialization and various studies have shown that long exposure to noise can result in different health issues. Therefore, the performance of large industrial baffled silencer is crucial for reducing the environmental noise from large industrial plants. In this particular research the acoustic parameters of several different configurations of parallel baffled silencers have been compared by using an in-situ measurement method according to the ISO-11820:1996 Standard. The geometrical parameters e.g. length, thickness and distance between baffles as well as the absorption parameters of baffles have been changed in terms of full absorption and half-absorption surface. Furthermore, their influence on the silencer performance in channel with and without flow has been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-situ measurement setup including the influence of the reflections from baffles at the inlet side and opening at the outlet side. Moreover, the analytical expression (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration has been compared with the measurement values on octave bands of interest. Additionally, the sound pressure distribution between baffles has also been measured and it can be concluded that the sound pressure level change is much larger at the beginning when compared to the value at the end of a silencer.
VL  - 3
IS  - 3
ER  -

Copy | Download