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Y. Cai, Y. Mu, M. Wu, D. Ma, and J. Yang, "Spatial Distribution of Signals Emitted by a Sigma-Delta Modulation-Driven Linear Digital Transducer Array," J. Audio Eng. Soc., vol. 61, no. 3, pp. 99-112, (2013 March.). doi: Y. Cai, Y. Mu, M. Wu, D. Ma, and J. Yang, "Spatial Distribution of Signals Emitted by a Sigma-Delta Modulation-Driven Linear Digital Transducer Array," J. Audio Eng. Soc., vol. 61 Issue 3 pp. 99-112, (2013 March.). doi:
Abstract: Combing sigma-delta modulation with digital drivers in a loudspeaker array adds an extra dimension of flexibility because a smaller number of transducers can each be driven with a unique digital signal. The drive signal is effectively a vector. This architecture has the advantage of high integration, smaller size, lower cost, and improved electroacoustic efficiency. Based on simulations and experiments, it is clear the various performance metrics, such as sound pressure level, signal-to-noise, and harmonic distortion, are a function of the spatial angle relative to the midline. Because of the differences in acoustic path length, the quantization noise in the channels may no longer cancel at some angles.

@article{cai2013spatial,
author={cai, yefeng and mu, yongsheng and wu, ming and ma, dengyong and yang, jun},
journal={journal of the audio engineering society},
title={spatial distribution of signals emitted by a sigma-delta modulation-driven linear digital transducer array},
year={2013},
volume={61},
number={3},
pages={99-112},
doi={},
month={march},} @article{cai2013spatial,
author={cai, yefeng and mu, yongsheng and wu, ming and ma, dengyong and yang, jun},
journal={journal of the audio engineering society},
title={spatial distribution of signals emitted by a sigma-delta modulation-driven linear digital transducer array},
year={2013},
volume={61},
number={3},
pages={99-112},
doi={},
month={march},
abstract={combing sigma-delta modulation with digital drivers in a loudspeaker array adds an extra dimension of flexibility because a smaller number of transducers can each be driven with a unique digital signal. the drive signal is effectively a vector. this architecture has the advantage of high integration, smaller size, lower cost, and improved electroacoustic efficiency. based on simulations and experiments, it is clear the various performance metrics, such as sound pressure level, signal-to-noise, and harmonic distortion, are a function of the spatial angle relative to the midline. because of the differences in acoustic path length, the quantization noise in the channels may no longer cancel at some angles.},}

TY - paper
TI - Spatial Distribution of Signals Emitted by a Sigma-Delta Modulation-Driven Linear Digital Transducer Array
SP - 99 EP - 112
AU - Cai, Yefeng
AU - Mu, Yongsheng
AU - Wu, Ming
AU - Ma, Dengyong
AU - Yang, Jun
PY - 2013
JO - Journal of the Audio Engineering Society
IS - 3
VO - 61
VL - 61
Y1 - March 2013 TY - paper
TI - Spatial Distribution of Signals Emitted by a Sigma-Delta Modulation-Driven Linear Digital Transducer Array
SP - 99 EP - 112
AU - Cai, Yefeng
AU - Mu, Yongsheng
AU - Wu, Ming
AU - Ma, Dengyong
AU - Yang, Jun
PY - 2013
JO - Journal of the Audio Engineering Society
IS - 3
VO - 61
VL - 61
Y1 - March 2013
AB - Combing sigma-delta modulation with digital drivers in a loudspeaker array adds an extra dimension of flexibility because a smaller number of transducers can each be driven with a unique digital signal. The drive signal is effectively a vector. This architecture has the advantage of high integration, smaller size, lower cost, and improved electroacoustic efficiency. Based on simulations and experiments, it is clear the various performance metrics, such as sound pressure level, signal-to-noise, and harmonic distortion, are a function of the spatial angle relative to the midline. Because of the differences in acoustic path length, the quantization noise in the channels may no longer cancel at some angles.