Sound Field Reproduction With Energy Constraint on Loudspeaker Weights

Betlehem, Terence; Withers, Christopher S.

doi:10.1109/tasl.2012.2199981

Cited by 49 publications

(24 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The approach uses a sufficiently dense distribution of microphones within all the zones as the matching points and adopts the least-squares method to control the pressure at each point. A constraint on the loudspeaker weight energy (or the array effort) is added to control the sound leakage outside the sound zones and to ensure the implementation is robust against speaker positioning errors and changes in the acoustic environment [144]. When the desired soundfeld in the bright zone is due to a few virtual source directions, the multi-zone sound control problem can be solved using a compressive sensing idea dolwhere the loudspeaker weights are regularised with the L 1 norm.…”

Section: Multi-zone Sound Reproductionmentioning

confidence: 99%

Surround by Sound: A Review of Spatial Audio Recording and Reproduction

et al. 2017

View full text Add to dashboard Cite

Abstract:In this article, a systematic overview of various recording and reproduction techniques for spatial audio is presented. While binaural recording and rendering is designed to resemble the human two-ear auditory system and reproduce sounds specifically for a listener's two ears, soundfield recording and reproduction using a large number of microphones and loudspeakers replicate an acoustic scene within a region. These two fundamentally different types of techniques are discussed in the paper. A recent popular area, multi-zone reproduction, is also briefly reviewed in the paper. The paper is concluded with a discussion of the current state of the field and open problems.

show abstract

Section: Multi-zone Sound Reproductionmentioning

confidence: 99%

Surround by Sound: A Review of Spatial Audio Recording and Reproduction

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The regularization factor β , which was introduced to limit the input energy, has significant impact on system performance [4], [8], [9], [20] and various techniques are available for the calculation of β [8], [9], [20]. In this work, we use the so-called Normalized Tikhonov regularization (NTR) method, wherein the regularization factor is calculated as [9], [21] …”

Section: B Choice Of the Regularization Parametermentioning

confidence: 99%

“…However, due to this choice, we expect the input energy to vary between different scenarios. An optimal choice for β to satisfy a constraint on a desired level of maximum input energy allowed to the sources [20], [8], [22] within the framework proposed in this work is left to future work. The parameter β 0 may also be used to ensure system robustness against mismatches between assumed Z and actual responses.…”

Section: B Choice Of the Regularization Parametermentioning

confidence: 99%

Generation of Private Sound With a Circular Loudspeaker Array and the Weighted Pressure Matching Method

Olivieri

Fazi

Fontana

et al. 2017

IEEE/ACM Trans. Audio Speech Lang. Process.

View full text Add to dashboard Cite

Abstract-In this work, we propose a system for private sound which is based on the Weighted Pressure Matching method (WPMM). The aim is to design the input signals to an array of loudspeakers which allow for the synthesis of a target field defined with large amplitude variations between the so-called dark points and the listener's position. The system enables listeners to control the trade-off between directivity performance and the accuracy of reproduction of the target field at the listening position when the input energy to the array is limited. This is achieved by calculating the WPMM weight in the dark zone based on a performance constraint on the characteristics of the sound field in the listening zone. The system is validated for a number of pre-defined use-case scenarios. The results of the experiments in an anechoic environment with a circular array prototype show that listeners can control the performance trade-off in a wide frequency range. In the second part of the paper, algorithms are presented for the fast update of the input signals when the user selects a new value of the performance constraint.

show abstract

“…The approach uses a sufficiently dense distribution of microphones within all the zones as the matching points and adopts the least-squares method to control the pressure at each point. A constraint on the loudspeaker Zhang et al, JASA, p. 5 weight energy (or the array effort) is added to control the sound leakage outside the sound zones and to ensure the implementation is robust against speaker positioning errors and changes in the acoustic environment 13 . When the desired sound field in the bright zone is due to a few virtual source directions, the multi-zone sound control problem can be solved using a compressive sensing idea where the loudspeaker weights are regularised with the…”

Section: Introductionmentioning

confidence: 99%

Analysis and control of multi-zone sound field reproduction using modal-domain approach

Zhang

Abhayapala

Betlehem

et al. 2016

The Journal of the Acoustical Society of America

Self Cite

View full text Add to dashboard Cite

Multi-zone sound control aims to reproduce multiple sound fields independently and simultaneously over different spatial regions within the same space. This paper investigates the multi-zone sound control problem formulated in the modal domain using the Lagrange cost function and provides a modal-domain analysis of the problem. The Lagrange cost function is formulated to represent a quadratic objective of reproducing a desired sound field within the bright zone and with constraints on sound energy in the dark zone and global region.

show abstract

Sound Field Reproduction With Energy Constraint on Loudspeaker Weights

Cited by 49 publications

References 14 publications

Surround by Sound: A Review of Spatial Audio Recording and Reproduction

Surround by Sound: A Review of Spatial Audio Recording and Reproduction

Generation of Private Sound With a Circular Loudspeaker Array and the Weighted Pressure Matching Method

Analysis and control of multi-zone sound field reproduction using modal-domain approach

Contact Info

Product

Resources

About