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K. Been, Y. Hwang, Y. Je, H. Lee, and W. Moon, "High Power Efficiency and Broad Flat Radiation Bandwidth of a Parametric Array PMUT Loudspeaker," Paper 9314, (2015 May.). doi: K. Been, Y. Hwang, Y. Je, H. Lee, and W. Moon, "High Power Efficiency and Broad Flat Radiation Bandwidth of a Parametric Array PMUT Loudspeaker," Paper 9314, (2015 May.). doi:
Abstract: Parametric Array loudspeakers can generate a sound beam using nonlinear acoustic interactions, widely known as “Parametric Array,” that can enable private listening in a public area. Parametric array loudspeakers can be applied to many applications, such as information technology devices, that require a high power efficiency and wide bandwidth. In a previous study, a piezoelectric micro-machined ultrasonic transducer (PMUT) is shown to be an efficient unit for a parametric array loudspeaker. In this paper we will describe realization of a parametric array loudspeaker with high power efficiency (up to 71%) and wide flat radiation bandwidth (19.5 kHz, difference frequency wave with equalization), which consists of an array of PMUTs with two resonance frequencies (f1 = 100 kHz, f2 = 110 kHz) and use of “out-of-phase” driving techniques.

@article{been2015high,
author={been, kyounghun and hwang, younghwan and je, yub and lee, haksue and moon, wonkyu},
journal={journal of the audio engineering society},
title={high power efficiency and broad flat radiation bandwidth of a parametric array pmut loudspeaker},
year={2015},
volume={},
number={},
pages={},
doi={},
month={may},} @article{been2015high,
author={been, kyounghun and hwang, younghwan and je, yub and lee, haksue and moon, wonkyu},
journal={journal of the audio engineering society},
title={high power efficiency and broad flat radiation bandwidth of a parametric array pmut loudspeaker},
year={2015},
volume={},
number={},
pages={},
doi={},
month={may},
abstract={parametric array loudspeakers can generate a sound beam using nonlinear acoustic interactions, widely known as “parametric array,” that can enable private listening in a public area. parametric array loudspeakers can be applied to many applications, such as information technology devices, that require a high power efficiency and wide bandwidth. in a previous study, a piezoelectric micro-machined ultrasonic transducer (pmut) is shown to be an efficient unit for a parametric array loudspeaker. in this paper we will describe realization of a parametric array loudspeaker with high power efficiency (up to 71%) and wide flat radiation bandwidth (19.5 khz, difference frequency wave with equalization), which consists of an array of pmuts with two resonance frequencies (f1 = 100 khz, f2 = 110 khz) and use of “out-of-phase” driving techniques.},}

TY - paper
TI - High Power Efficiency and Broad Flat Radiation Bandwidth of a Parametric Array PMUT Loudspeaker
SP - EP -
AU - Been, Kyounghun
AU - Hwang, Younghwan
AU - Je, Yub
AU - Lee, Haksue
AU - Moon, Wonkyu
PY - 2015
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2015 TY - paper
TI - High Power Efficiency and Broad Flat Radiation Bandwidth of a Parametric Array PMUT Loudspeaker
SP - EP -
AU - Been, Kyounghun
AU - Hwang, Younghwan
AU - Je, Yub
AU - Lee, Haksue
AU - Moon, Wonkyu
PY - 2015
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2015
AB - Parametric Array loudspeakers can generate a sound beam using nonlinear acoustic interactions, widely known as “Parametric Array,” that can enable private listening in a public area. Parametric array loudspeakers can be applied to many applications, such as information technology devices, that require a high power efficiency and wide bandwidth. In a previous study, a piezoelectric micro-machined ultrasonic transducer (PMUT) is shown to be an efficient unit for a parametric array loudspeaker. In this paper we will describe realization of a parametric array loudspeaker with high power efficiency (up to 71%) and wide flat radiation bandwidth (19.5 kHz, difference frequency wave with equalization), which consists of an array of PMUTs with two resonance frequencies (f1 = 100 kHz, f2 = 110 kHz) and use of “out-of-phase” driving techniques.