2007
DOI: 10.1121/1.2739113
|View full text |Cite
|
Sign up to set email alerts
|

Directive sources in acoustic discrete-time domain simulations based on directivity diagrams

Abstract: Discrete-time domain methods provide a simple and flexible way to solve initial boundary value problems. With regard to the sources in such methods, only monopoles or dipoles can be considered. However, in many problems such as room acoustics, the radiation of realistic sources is directional-dependent and their directivity patterns have a clear influence on the total sound field. In this letter, a method to synthesize the directivity of sources is proposed, especially in cases where the knowledge is only base… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

0
14
0

Year Published

2008
2008
2019
2019

Publication Types

Select...
7
1

Relationship

1
7

Authors

Journals

citations
Cited by 28 publications
(14 citation statements)
references
References 9 publications
0
14
0
Order By: Relevance
“…Since direct extension to multipole, plane-wave, and further spatially distributed excitation forms 41 is straightforward, the simple monopole model, as formulated in the present study, is directly applicable in FDTD grid excitation for a wide variety of acoustic applications. Among more elaborate future extensions, the formulation of bi-directional coupling between the source and the medium is of interest, in particular with regard to the study of room-loudspeaker interactions.…”
Section: Discussionmentioning
confidence: 99%
“…Since direct extension to multipole, plane-wave, and further spatially distributed excitation forms 41 is straightforward, the simple monopole model, as formulated in the present study, is directly applicable in FDTD grid excitation for a wide variety of acoustic applications. Among more elaborate future extensions, the formulation of bi-directional coupling between the source and the medium is of interest, in particular with regard to the study of room-loudspeaker interactions.…”
Section: Discussionmentioning
confidence: 99%
“…The low frequency problem is not really a limitation, since most of the real sources radiate omnidirectionally; in the situation where sources have a directional pattern at low frequencies, then larger distances between monopoles will be required. 4 Regarding to the number of monopoles, it is possible to find a certain distribution of ͑m +1͒ 2 monopoles to describe a directivity based on spherical harmonics distribution of order m. 5 Once the corresponding impulse responses are calculated, they can be included in the updating equations as hard ͑forcing p͑r s , n͒ in their corresponding monopole positions͒, soft ͑including source terms in the inhomogeneous wave equation͒ or transparent sources. 10 For simplicity, the following discussion uses soft sources.…”
Section: Methodsmentioning
confidence: 99%
“…Consider now a grid function f l defined with respect to a particular local approximation region B, with associated coefficients b, as in (24). The discrete Fourier transform (29) may now be written aŝ…”
Section: A Spatial Fourier Transformsmentioning
confidence: 99%
“…The emphasis has been on distinct models (softsource, hard-source and transparent-source [18]- [20]), and, in S. Bilbao particular, filtering strategies applied in order to obtain reasonable impulse responses [21]. Directional sources have also been described, sometimes employing differences between neighbouring values on the grid [22], [23], and through direct comparison against specified directivity patterns [24]. The dual problem of receiver directivity in waveguide meshes (which are equivalent to FDTD) has been described in [25], [26].…”
Section: Introductionmentioning
confidence: 99%