Verification of Inverse Image Source Method Applied for Acoustic Field Creation in Open Area

Gołaś, Andrzej; Suder-Dębska, Katarzyna; Ciesielka, Wojciech; Filipek, R.

doi:10.12693/aphyspola.119.966

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…loudspeakers, amplifiers, signal processors), an attempt was made to build a true multi-channel system for sound creation in open areas based on the inverse image source method. First preliminary studies of this system in a measured object and results of the measurements confirm the results obtained through the simulations (Gołaś et al, 2011).…”

Section: Discussionsupporting

confidence: 76%

Multi-Channel System for Sound Creation in Open Areas

Gołaś¹,

Suder-Dębska²

2012

Archives of Acoustics

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There are typically two systems in use for sound reinforcement in open areas: the central, "wall of sound" system with speakers localized at the sides of the stage, and the zone system, in which additional speakers are introduced to obtain a uniform sound pressure level throughout the area of listening. In the past two decades the line array systems gained great popularity. The main purpose of their use is to obtain a uniformly distributed sound level throughout the listening area in order to achieve good speech intelligibility. The present paper aims to present an alternative and original method of sound reinforcement in open areas which is in contrast to the above solutions. This new method allows achieving a uniformly distributed sound pressure and good speech intelligibility in the area of interest, and also allows to gain spatial sound impression that accompanies sound reproduction in concert halls. Another advantage of the proposed system is the reduction of the sound level outside the area of interest, i.e. reduction of the noise level outside the area of listening.

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Section: Discussionsupporting

confidence: 76%

Multi-Channel System for Sound Creation in Open Areas

Gołaś¹,

Suder-Dębska²

2012

Archives of Acoustics

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Synthesis of the Impulse Response of the Transmission Path in a Selected Area of the Sound Field

2013

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Providing appropriate sound eld parameters in the listening area is very important. It often determines the possibilities of being able to use a facility. Assuming that the sound system is a linear object, it can be described by the impulse response. Unfortunately, it is not possible to designate a single impulse response for such a facility because it is a continuous system. Thus each path between the transmitter and the receiver has its own impulse response. Therefore, the authors have made an attempt to synthesize the impulse response for transmitterreceiver paths with suitable parameters of the sound eld in the neighbourhood of the receivers. A technical implementation of the presented synthesis will take place through introduction of additional sources. An experimental determination of the impulse response is relatively simple. The transient response can be numerically determined by using, for example, the nite element method or the boundary element method. Unfortunately, determining the impulse response through simulation of, e.g., planned objects, is much more dicult due to the high computational cost and the lack of precise data on the properties of the materials. For this reason, the authors used an energetic analogue of the impulse response, the echogram.

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Multi-Channel Sound Synthesis System in Open Area. A Case Study with the Use of~FEM

Ciesielka

Filipek

2014

Acta Phys. Pol. A

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This paper presents a new model of the multi-channel sound synthesis system. The research objective was to design and construct a sixteen-channel sound control system located in an open area with dimensions of 23.48 m × 17.48 m. The main goal of the system operation is to provide, for the controlled acoustic eld, the uniformity of the parameters distribution while minimizing the sound pressure level in the protected area. The modeling and simulation researches have been performed using the Finite Element Method (FEM). The results of the analysis include distributions of the sound pressure levels and phase angle for the selected frequencies. The paper presents results of sensitivity studies and optimization for dierent variants of the sound synthesis system.

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Verification of Inverse Image Source Method Applied for Acoustic Field Creation in Open Area

Cited by 3 publications

References 21 publications

Multi-Channel System for Sound Creation in Open Areas

Multi-Channel System for Sound Creation in Open Areas

Synthesis of the Impulse Response of the Transmission Path in a Selected Area of the Sound Field

Multi-Channel Sound Synthesis System in Open Area. A Case Study with the Use of~FEM

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