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Efficient outdoor sound propagation modeling with the finite-difference time-domain (FDTD) method: a review

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Abstract
The finite-difference time-domain (FDTD) method, solving the inhomogeneous, moving medium sound propagation equations, also referred to as the Linearized Euler(ian) Equations (LEE), has become a mature reference outdoor sound propagation model during the last two decades. It combines the ability to account for complex wave effects like reflection, scattering and diffraction near arbitrary objects, and complex medium effects like convection, refraction and (turbulent) scattering. In addition, it has the general advantages of a time-domain method. It is indicated that the numerical discretisation scheme should be chosen depending on the flow speed of the background medium. Perfectly matched layers, applicable to cases in presence of (non-) uniform flow, are state-of-the-art perfectly absorbing boundary conditions that are key in outdoor sound propagation applications, where only a small part of the unbounded atmosphere can be numerically described. Various ways to include outdoor soils are summarized, like time-domain impedance plane boundary conditions and explicitly including the upper part of the soil in the simulation domain. Approaches for long-distance sound propagation, including moving calculation frames and hybrid modeling are discussed. This review deals with linear sound propagation only.
Keywords
PERFECTLY MATCHED LAYER, COMPUTATIONAL ACOUSTICS, LINEARIZED EULER EQUATIONS, IMPEDANCE BOUNDARY-CONDITIONS, FREQUENCY RANGE, ELASTIC WAVES, SIMULATION, TURBULENCE, MEDIA, AEROACOUSTICS

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MLA
Van Renterghem, Timothy. “Efficient Outdoor Sound Propagation Modeling with the Finite-difference Time-domain (FDTD) Method: a Review.” INTERNATIONAL JOURNAL OF AEROACOUSTICS 13.5-6 (2014): 385–404. Print.
APA
Van Renterghem, T. (2014). Efficient outdoor sound propagation modeling with the finite-difference time-domain (FDTD) method: a review. INTERNATIONAL JOURNAL OF AEROACOUSTICS, 13(5-6), 385–404.
Chicago author-date
Van Renterghem, Timothy. 2014. “Efficient Outdoor Sound Propagation Modeling with the Finite-difference Time-domain (FDTD) Method: a Review.” International Journal of Aeroacoustics 13 (5-6): 385–404.
Chicago author-date (all authors)
Van Renterghem, Timothy. 2014. “Efficient Outdoor Sound Propagation Modeling with the Finite-difference Time-domain (FDTD) Method: a Review.” International Journal of Aeroacoustics 13 (5-6): 385–404.
Vancouver
1.
Van Renterghem T. Efficient outdoor sound propagation modeling with the finite-difference time-domain (FDTD) method: a review. INTERNATIONAL JOURNAL OF AEROACOUSTICS. 2014;13(5-6):385–404.
IEEE
[1]
T. Van Renterghem, “Efficient outdoor sound propagation modeling with the finite-difference time-domain (FDTD) method: a review,” INTERNATIONAL JOURNAL OF AEROACOUSTICS, vol. 13, no. 5–6, pp. 385–404, 2014.
@article{5790035,
  abstract     = {The finite-difference time-domain (FDTD) method, solving the inhomogeneous, moving medium sound propagation equations, also referred to as the Linearized Euler(ian) Equations (LEE), has become a mature reference outdoor sound propagation model during the last two decades. It combines the ability to account for complex wave effects like reflection, scattering and diffraction near arbitrary objects, and complex medium effects like convection, refraction and (turbulent) scattering. In addition, it has the general advantages of a time-domain method. It is indicated that the numerical discretisation scheme should be chosen depending on the flow speed of the background medium. Perfectly matched layers, applicable to cases in presence of (non-) uniform flow, are state-of-the-art perfectly absorbing boundary conditions that are key in outdoor sound propagation applications, where only a small part of the unbounded atmosphere can be numerically described. Various ways to include outdoor soils are summarized, like time-domain impedance plane boundary conditions and explicitly including the upper part of the soil in the simulation domain. Approaches for long-distance sound propagation, including moving calculation frames and hybrid modeling are discussed. This review deals with linear sound propagation only.},
  author       = {Van Renterghem, Timothy},
  issn         = {1475-472X},
  journal      = {INTERNATIONAL JOURNAL OF AEROACOUSTICS},
  keywords     = {PERFECTLY MATCHED LAYER,COMPUTATIONAL ACOUSTICS,LINEARIZED EULER EQUATIONS,IMPEDANCE BOUNDARY-CONDITIONS,FREQUENCY RANGE,ELASTIC WAVES,SIMULATION,TURBULENCE,MEDIA,AEROACOUSTICS},
  language     = {eng},
  number       = {5-6},
  pages        = {385--404},
  title        = {Efficient outdoor sound propagation modeling with the finite-difference time-domain (FDTD) method: a review},
  url          = {http://dx.doi.org/10.1260/1475-472X.13.5-6.385},
  volume       = {13},
  year         = {2014},
}

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