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Article


Title

Modeling of Sound Power Transmission within Duct Systems

Authors

[ 1 ] Instytut Mechaniki Stosowanej, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.8] Mechanical engineering

Year of publication

2020

Published in

Vibrations in Physical Systems

Journal year: 2020 | Journal volume: vol. 31 | Journal number: no. 3

Article type

scientific article

Publication language

english

Keywords
EN
  • transmission loss
  • finite element method
  • dimensionless acoustic equations
  • sound power
Abstract

EN External boundaries of acoustic devices can channel sound propagation, and in some cases can create buildup or attenuation of acoustic energy within a confined space. In this paper,it is proposed an efficient practicalnumerical method (based on FEM) of calculation of attenuation of sound power transmission through ducts. The method shows its viability by presenting the reasonably consistent anticipation of the experimental result. One can observe the mechanical behaviour of the duct’s medium for lower frequencies (high transmission loss) and wave behaviour for higher frequencies (small or zero attenuation). The authors proved that mechanical vibrations of medium reduce the possibility of acoustic energy transmission in duct systems. The radiation impedance for the duct iscalculated as well.

Pages (from - to)

2020320-1 - 2020320-6

DOI

10.21008/j.0860-6897.2020.3.20

URL

https://vibsys.put.poznan.pl/_journal/2020-31-3/articles/vibsys_2020320.pdf

Comments

Article Number: 2020320

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Date of Open Access to the publication

at the time of publication

Full text of article

Download file

Access level to full text

public

Points of MNiSW / journal

40.0

Points of MNiSW / journal in years 2017-2021

70.0

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