Simulation of outdoor sound propagation with a transmission line matrix method

Hofmann, Julian; Heutschi, Kurt

doi:10.1016/j.apacoust.2005.10.006

Cited by 24 publications

(13 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hofmann has shown the equivalence of this approach with the resolution of the discretized wave equation [12]. Other authors have also derived the two-dimensional homogeneous cartesian formulation of TLM from a Lattice Boltzmann model by removing nonlinear terms, in choosing a suitable viscosity and selecting a square grid [18].…”

Section: Tlm Modellingmentioning

confidence: 99%

See 1 more Smart Citation

Application of the transmission line matrix method for outdoor sound propagation modelling – Part 1: Model presentation and evaluation

Guillaume¹,

Aumond²,

Gauvreau³

et al. 2014

Applied Acoustics

View full text Add to dashboard Cite

show abstract

Section: Tlm Modellingmentioning

confidence: 99%

“…In order to incorporate the atmospheric effects, Hofmann has proposed an interesting formulation, which is however limited to temperature effects [12]. A first attempt to define a TLM scheme with unidirectional mean flow (e.g.…”

Section: Introductionmentioning

confidence: 99%

Application of the transmission line matrix method for outdoor sound propagation modelling – Part 1: Model presentation and evaluation

Guillaume¹,

Aumond²,

Gauvreau³

et al. 2014

Applied Acoustics

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…The basic principle is agrid of connected tubes [16] complemented by cavities at the intersections as shown in Figure 1. The advantage of such am odel compared to am ore general one without anyr estrictions is that ap riori knowledge of the rough structure of ballast material is considered.…”

Section: Interpretation Of Ballast As An Electrical Transmission Linementioning

confidence: 99%

Sound Propagation over Ballast Surfaces

Heutschi¹

2009

Acta Acustica united with Acustica

Self Cite

View full text Add to dashboard Cite

Sound emission measurements of railwayvehicles are usually performed with microphones close to the railway line. In case of double-track lines and vehicles on the distant track ground reflections develop mainly above the ballast bed. The uncertainty of estimated sound power based on microphone signals depends on the accuracyof considered propagation effects. It is found that ground reflection overballast has to be understood as an extendedreaction process. With the application of as imple geometrical model for ab allast structure good agreement between measurement and calculation could be achieved. The model wasvalidated for alarge set of loudspeaker measurements conducted at the occasion of the development work of sonRAIL, the newS wiss railwayn oise calculation model.

show abstract

Simulation of outdoor sound propagation with a transmission line matrix method

Cited by 24 publications

References 7 publications

Application of the transmission line matrix method for outdoor sound propagation modelling – Part 1: Model presentation and evaluation

Application of the transmission line matrix method for outdoor sound propagation modelling – Part 1: Model presentation and evaluation

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

Sound Propagation over Ballast Surfaces

Contact Info

Product

Resources

About