Development of a Personal Audio Performance Controller With Efficient, Fine, and Linear Tunable Functions

Ryu, Homin; Wang, Semyung; Kim, Seon Man

doi:10.1109/access.2020.3005723

Cited by 2 publications

(7 citation statements)

References 19 publications

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“…Acoustic contrast is defined as the ratio of the sound potential energy density in the bright zone to the sound potential energy density in the dark zone. The greater the value of acoustic contrast, the greater the difference of sound pressure level between the bright zone and the dark zone [42]. The calculation formula of the sound potential energy density ζ in control zone Z is:…”

Section: Acc Methodsmentioning

confidence: 99%

“…If a method results in a higher value of acoustic contrast, it means that this method works better [42]. The second performance index is reproduction error (RE), and its definition is the normalized spatial average error between the desired sound field and the reconstructed sound field in the bright zone, which is calculated by the following formula:…”

Section: Indices Of Sound Field Controlmentioning

confidence: 99%

“…Minimization of weighted pressure error and energy method uses the weight factor to adjust the sound pressure error in the bright zone, sound energy in the dark zone and loudspeaker array effort [41]. To adjust the reconstructed sound field performance by the minimization of weighted pressure error and energy method linearly and in real time, Ryu et al proposed a personal audio control method [42] in which the weights of loudspeaker arrays are simulated as simple continuous functions by using piecewise linear approximation (PLA). Experiments show that the proposed control method can achieve fine tuning and linear adjustment of reconstructed sound field performance, and the performance of the proposed control method is slightly reduced compared with that of the minimization of weighted pressure error and energy method.…”

Section: Introductionmentioning

confidence: 99%

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Two Sound Field Control Methods Based on Particle Velocity

Wang

Zhang

2022

Electronics

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In recent years, a variety of sound field control methods have been proposed for the generation of separated sound regions. Different algorithms control the physical properties of the generated sound field to different degrees. The existing methods mainly focus on sound pressure restoration and its related improvement. When the loudspeaker array is non-uniformly placed, the reconstruction system is not stable enough. To solve this problem, this paper proposes two sound field control methods related to particle velocity. The first method regulates the reconstruction error of particle velocity in the bright zone and the square of particle velocity in the dark zone; the second method regulates the reconstruction error of sound pressure and particle velocity in the bright zone and the square of sound pressure and particle velocity in the dark zone. Five channel and twenty-two channel non-uniform loudspeaker systems were used for two-dimensional and three-dimensional computer simulation testing. Experimental results show that the two proposed methods have better tradeoffs in terms of acoustic contrast, reproduction error and array effort than traditional methods, especially the second proposed method. In the two-dimensional experiment, the maximum reductions of the average array efforts generated by the proposed methods were about 10 dB and 11 dB compared with the average array efforts generated by two traditional methods. In the three-dimensional experiment, the maximum reductions of the average array efforts generated by the proposed methods were about 8 dB and 2 dB compared with the average array efforts generated by two traditional methods. The smaller the array effort, the more stable the loudspeaker system. Therefore, the reconstruction systems produced by the proposed methods are more stable than those produced by the traditional methods.

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Section: Acc Methodsmentioning

confidence: 99%

Section: Indices Of Sound Field Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two Sound Field Control Methods Based on Particle Velocity

Wang

Zhang

2022

Electronics

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“…The measurement criteria of these three indicators are as follows: the smaller the RE, the better the corresponding method; the larger the AC, the better the corresponding method; the smaller the AE, the better the corresponding method, and the more robust and stable the system [16].…”

Section: Quality Of Sound Field Controlmentioning

confidence: 99%

“…The weight trajectories of loudspeakers are modeled as continuous functions based on piecewise linear approximations of the performance variation. The experimental results show that the controller can regulate the system performance linearly [16]. Hu et al introduced a sound field control method in a time domain based on sound pressure and particle velocity for single-zone sound field reconstruction.…”

Section: Introductionmentioning

confidence: 99%

A Stable Sound Field Control Method for a Personal Audio System

Wang,

Zhang

2023

Applied Sciences

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A personal audio system has a wide application prospect in people’s lives, which can be implemented by sound field control technology. However, the current sound field control technology is mainly based on sound pressure or its improvement, ignoring another physical property of sound: particle velocity, which is not conducive to the stability of the entire reconstruction system. To address the problem, a sound field method is constructed in this paper, which minimizes the reconstruction error in the bright zone, minimizes the loudspeaker array effort in the reconstruction system, and at the same time controls the particle velocity and sound pressure of the dark zone. Five unevenly placed loudspeakers were used as the initial setup for the computer simulation experiment. Simulation results suggest that the proposed method is better than the PM (pressure matching) and EDPM (eigen decomposition pseudoinverse method) methods in the bright zone in an acoustic contrast index, the ACC (acoustic contrast control) method in a reconstruction error index, and the ACC, PM, and EDPM methods in the bright zone in a loudspeaker array effort index. The average array effort of the proposed method is the smallest, which is about 9.4790, 8.0712, and 4.8176 dB less than that of the ACC method, the PM method in the bright zone, and the EDPM method in the bright zone, respectively, so the proposed method can produce the most stable reconstruction system when the loudspeaker system is not evenly placed. The results of computer experiments demonstrate the performance of the proposed method, and suggest that compared with traditional methods, the proposed method can achieve more balanced results in the three indexes of acoustic contrast, reconstruction error, and loudspeaker array effort on the whole.

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Development of a Personal Audio Performance Controller With Efficient, Fine, and Linear Tunable Functions

Cited by 2 publications

References 19 publications

Two Sound Field Control Methods Based on Particle Velocity

Two Sound Field Control Methods Based on Particle Velocity

A Stable Sound Field Control Method for a Personal Audio System

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