Weighted Loudspeaker Placement Method for Sound Field Reproduction

Gao, Hao; Feng, Xuelei; Shen, Yong

doi:10.1109/taslp.2022.3158187

Cited by 6 publications

(1 citation statement)

References 45 publications

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“…With the advancement of acoustic simulation and visualization technologies, it has become feasible to simulate and visualize a sound field with given conditions for the sound sources and environment in recent decades [1]. Therefore, loudspeaker placement, including the number, direction, and position of loudspeakers, can be optimized with simulation and visualization for various purposes [2][3][4], which is superior to typical trial-and-error methods. Popular acoustic simulation approaches can be generally categorized into wave-based approaches [5][6][7] and geometry-based approaches [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Visualization of Demodulated Sound Based on Sequential Acoustic Ray Tracing with Self-Demodulation in Parametric Array Loudspeakers

Geng,

Shimokata,

Nakayama

et al. 2024

Applied Sciences

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With the development of acoustic simulation methods in recent decades, it has become feasible to simulate the sound pressure distribution of loudspeakers before actually setting physical speakers and measuring the sound field. The parametric array loudspeaker (PAL) has attracted attention due to its sharp directivity and unique applications. However, the sound reproduced by PALs is generated by the nonlinear interactions of ultrasound in the air, which makes it difficult to simulate the reproduced sound of a PAL with low computational load. Focusing on the sharp directivity of ultrasound, we extended conventional acoustic ray-tracing methods to consider the self-demodulation phenomenon of PALs. In this study, we developed a visualization method for the demodulated sound of a PAL. Specifically, the demodulated sound pressure distribution can be simulated to estimate and visualize the area covered by the reproduced sound of PAL before setting a real PAL. In the proposed method, acoustic rays were generated sequentially to express the generation of demodulated sound. Therefore, the proposed method is expected to simulate the demodulated sound of a PAL with acceptable accuracy and low calculation complexity. Quantitative evaluation between simulation results and practical measurement has been carried out, and the results demonstrate the effectiveness of the proposed method.

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