Finite Element Sound Field Analysis of Diffuseness in Reverberation Rooms

Tomiku, Reiji; Otsuru, Toru; Takahashi, Yasuo

doi:10.3130/jaabe.1.2_33

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…Tomiku et al [50] used the FEM to study the spatial variation of sound pressure levels in reverberation chambers. They compared the spatial correlation of the simulated sound field with that of a diffuse field.…”

Section: Direct Approachmentioning

confidence: 99%

A Review of Finite Element Methods for Room Acoustics

Prinn

2023

Acoustics

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Accurate predictions of the wave-dominated region of an acoustic field in a room can be generated using wave-based computational methods. One such method is the finite element method (FEM). With presently available computing power and advanced numerical techniques, it is possible to obtain FEM predictions of sound fields in rooms with complicated geometries and complex boundary conditions in realistic time frames. The FEM has been continuously developed since its inception and attempts to provide solutions in real time using finite element-based methods are beginning to appear in the literature; these developments are especially interesting for auralization and virtual acoustics applications. To support these efforts, and provide a resource for neophytes, the use of the FEM for room acoustics is reviewed in this article. A history is presented alongside examples of the method’s derivation, implementation, and solutions. The current challenges and state-of-the-art are also presented, and it is found that the most recent contributions to the field make use of one or a mixture of the following: the finite element-based discontinuous Galerkin method, extended reaction boundary conditions written in the frequency domain but solved in the time domain, and the solution of large-scale models using parallel processing and graphics processing units.

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Section: Direct Approachmentioning

confidence: 99%

A Review of Finite Element Methods for Room Acoustics

Prinn

2023

Acoustics

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“…Therefore, to use FEM for this problem is tried. Of course, there are many papers [12,13] using FEM for estimation of sound insulation characteristics. As shown in these papers, there are no FEM papers for corresponding to the original definition of transmission loss.…”

Section: Introductionmentioning

confidence: 99%

Development of New Sound Insulation Simulation Technology Using Finite Element Method for Efficiency of High Aspect Ratio Core in Low Frequency Range

Aya¹,

Hagiwara²

2022

IJMEA

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Nowadays, meta-materials are being studied to reduce vehicle interior noise. But it has not yet been found effective meta-materials at low frequencies below 500Hz. A panel with one core which has an excellent sound insulation where the higher the height of the core, the better the sound insulation characteristics have been founded. And so, depending on the core height, a structure with one core which is effective even at 500hz or less may be obtained. If the core height is high, it cannot be obtained by press forming, so the origami forming has been developed. Use of FEM which is versatile for shape of structure is effective for analysis of the plate with core or with sound absorbing material. Although the FEM analysis for sound insulation analysis was difficult, so far, two methods have been developed. Here these two methods to a flat plate and a flat plate with sound absorbing material to grasp their characteristics are compared and applied. And then the more versatile method is selected for sound insulation analysis to plates with one core which are formed by origami forming. As a result, it is shown that a plate with one core is effective for sound insulation characteristics at the low frequency below 500Hz depending on the balance between plate thickness and core height. At last, it is shown the core shape that maximizes the integral value of the sound insulation characteristic from 0 Hz to 500 Hz by an optimal analysis.

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“…Such materials have been subjected to aging processes [14]. Sound absorption indexes of materials limiting the rooms have impact on the diffusivity of acoustic field [15]. This is one of the reasons why various, high-precision estimation models of reverberation time are being worked out [16].…”

Section: Application Of the Analytic Hierarchy Process (Ahp) For Acoumentioning

confidence: 99%

Application of the Analytic Hierarchy Process (Ahp) for Acoustic Adaptation of Classrooms

Nowoświat

SZURMAN²

2017

Architecture, Civil Engineering, Environment

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Architectural organization of educational space is an important factor facilitating the realization of pedagogical process [1]. It should contribute to the creation of better microclimate in classrooms. Classroom microcli-mate, as pointed out by many researchers [2-4] plays a significant role in ensuring high quality teaching process. Obviously, the said microclimate is dependent on classrooms acoustics [5]. The main parameters describing room acoustics involve reverberation time [6][7] or Speech Transmission Index (STI) [8]. Anyway,

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Finite Element Sound Field Analysis of Diffuseness in Reverberation Rooms

Cited by 9 publications

References 14 publications

A Review of Finite Element Methods for Room Acoustics

A Review of Finite Element Methods for Room Acoustics

Development of New Sound Insulation Simulation Technology Using Finite Element Method for Efficiency of High Aspect Ratio Core in Low Frequency Range

Application of the Analytic Hierarchy Process (Ahp) for Acoustic Adaptation of Classrooms

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