A forward-advancing wave expansion method for numerical solution of large-scale sound propagation problems

Rolla, L. Barrera; Rice, Henry J.

doi:10.1016/j.jsv.2006.02.023

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…The wave expansion method (WEM) was first proposed by Caruthers et al [8], and was more recently used by Ruiz and Rice [10] and Barrera Rolla and Rice [15] to investigate sound propagation in quiescent media. The discretisation scheme may be used for solving linearised time-harmonic propagation equations.…”

Section: Wave Expansion Discretisation Schemementioning

confidence: 99%

A wave expansion method for acoustic propagation in lined flow ducts

O’Reilly

2015

Applied Acoustics

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Acoustic liners are used extensively in engineering applications, particularly in aero-engines and automotive exhaust systems. In this paper, a flow impedance boundary conditions is introduced into the wave expansion method with the aim of providing an efficient methodology for computing the acoustic propagation through a lined duct with flow. For a potential flow, the boundary layer and the lined wall are included in the discretisation scheme by the Myers flow impedance boundary condition. The acoustic propagation through a flow-impedance tube is computed in order to validate the implementation of the impedance boundary condition in this scheme. The results show that this computationally light methodology provides generally good agreement with the experimental data.

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Section: Wave Expansion Discretisation Schemementioning

confidence: 99%

A wave expansion method for acoustic propagation in lined flow ducts

O’Reilly

2015

Applied Acoustics

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“…ray tracing technique, geometrical theory of diffraction and creeping wave theory)a nd numerical methods of sound levelprediction have been proposed. The examples of the latter include: Fast Field Program [6,7], Parabolic Equation Model [8,9,10,11], Meteo-Boundary Element Method [12], Finite-Difference Time-Domain Model [13,14], Linear Euler Model [15,16], Forward Wave Expansion Method [17], and Transmission Line Matrix Method [18]. Their predictive skills depend on the input data on the weather conditions, terrain and building arrangements.…”

Section: Inroductionmentioning

confidence: 99%

Estimation of Day-Evening-Night Sound Level of Road Traffic Noise in Urban Area

Makarewicz¹

2011

Acta Acustica united with Acustica

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Road trafficn oise, within an urban area, is under consideration. The proposed method enables approximation of the yearly average value of the day-night sound level, L den ,a nd its uncertainty, U den .T he method requires measurements of the one-hour average sound level, L Aeq,1h ,a nd concurrent measurements of the hourly traffic flowand trafficspeed. The measurements have to be carried out under four types of meteorological conditions. Calculations of L den and U den are facilitated by the use of the Japanese model of noise generation.

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