Examination of the Effect of a Sound Source Location on the Steady-State Response of a Two-Room Coupled System

Meissner, Mirosław

doi:10.2478/v10168-011-0051-7

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…According to Eqs. (6) and (10), the curl of I is proportional to the vector product of real and imaginary parts of velocity amplitude…”

Section: Distributions Of Active Sound Intensitymentioning

confidence: 99%

Sound Energy Field in a System of Coupled Rooms

Meissner

2014

Acta Phys. Pol. A

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The paper presents a theoretical basis of calculations of the sound intensity in enclosed spaces and shows results of numerical visualization of the active intensity in a room with absorptive walls formed by two coupled rectangular subrooms. The study was focused on the low-frequency range, therefore to describe the active and reactive intensities, the modal theory of room acoustics was applied. Space distribution of eigenfunctions, modal frequencies and modal damping coecients were calculated numerically using the forced oscillator method (FOM) and the nite dierence time-domain (FDTD) method. Based on theoretical and numerical results, the computer program has been developed to simulate the active intensity vector eld when the room is excited by a harmonic point source. Calculation data have shown that the active intensity was extremely sensitive to position of the source since at a xed source frequency, dierent source locations always generate dierent distributions of characteristic objects of the active sound eld such as energy vortices and stagnation points. Because of complex room shape, the vortex centers are in most cases positioned irregularly inside the room. Almost regular arrangement of vortices was found only in the case when the source frequency was tuned to the frequencies of modes which were strongly localized in one of the subrooms.

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“…According to Eqs. (6) and (10), the curl of I is proportional to the vector product of real and imaginary parts of velocity amplitude…”

Section: Distributions Of Active Sound Intensitymentioning

confidence: 99%

Sound Energy Field in a System of Coupled Rooms

Meissner

2014

Acta Phys. Pol. A

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show abstract

“…Statistical properties of the active and reactive intensities in reverberant enclosures subjected to pure-tone excitation have been studied by Jacobsen and Molares [27]. Behavior of scalar and vector characteristics of steady-state sound field inside coupled rooms and irregular enclosures has been analyzed by the author in papers [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%