Modeling of sound power transmission within duct systems

• Autorzy: Strek Tomasz

Identyfikatory

DOI

10.21008/j.0860-6897.2020.3.20

• Języki publikacji: EN

Abstrakty

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 practical numerical 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 is calculated as well.

Słowa kluczowe

EN

transmission loss; finite element method; dimensionless acoustic equations; sound power

PL

izolacyjność akustyczna; metoda elementów skończonych; moc akustyczna

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2020
• Tom: Vol. 31, nr 3
• Strony: art. no. 2020320
• Opis fizyczny: Bibliogr. 4 poz., 1 rys., wykr.

Twórcy

autor

Strek Tomasz

• Poznan University of Technology ,Faculty of Mechanical Engineering, Institute of Applied Mechanics, ul. Jana Pawla II 24, 60-965 Poznan, Poland

Bibliografia

• 1. T. D. Rossing (Ed.), Handbook of Acoustic, Springer, LLC New York 2007.
• 2. M. Utsumi, Sound Transmission in Circular Ducts of Continuously Varying Cross-Sectional Area, Journal of Sound and Vibration, 242(2) (2001) 369-376.
• 3. G.P. Wilson, W.W. Soroka, Approximation to the Diffraction of Sound by a Circular Aperture in a Rigid Wall of Finite Thickness, The Journal of The Acoustical Society of America, 37(2) (1965) 286-297.
• 4. T. Strek, Finite Element Modelling of Sound Transmission Loss in Reflective Pipe. In: Finite Element Analysis, David Moratal (Ed.), 663-684, Sciyo, 2010.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).