Publicado 6 números por año
ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352
IF:
1.4
5-Year IF:
1.3
Immediacy Index:
2.2
Eigenfactor:
0.00034
JCI:
0.46
SJR:
0.333
SNIP:
0.606
CiteScore™::
3.1
H-Index:
31
Indexed in
A Fictitious Source Method for a Multifrequency Acoustic Source over Ground with Given Impedance
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SINOPSIS
Linear multifrequency acoustics problems in the atmospheric half-space, over flat ground with given impedance, occur in various applications, for example, in environmental engineering, where the analysis of the sound pressure level (SPL) distribution near the ground due to aircraft noise is desired. Since the human hearing range is very wide, the determination of the SPL distribution for a given source spectrum is not trivial and may be regarded as a multi-scale problem. To this end, one has to solve repeatedly, for many different wave numbers, the Helmholtz equation in the upper half-space, while imposing the given impedance boundary condition. A simple computational scheme, based on the use of fictitious sources, is devised for the efficient solution of these problems, leading to an effective SPL calculation. The computational aspects of the method are discussed, and its performance is demonstrated via numerical examples.
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