一种高效率、宽平坦带宽的参数化阵列PMUT扬声器

2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) Pub Date : 2015-06-21 DOI:10.1109/TRANSDUCERS.2015.7181371

K. Been, Y. Je, H. S. Lee, W. Moon

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引用次数: 5

摘要

先前的研究表明，压电微机械超声换能器(PMUT)可以用于构建PA扬声器，并开发了原型。在本文中，我们描述了使用更先进的封装制作的PA扬声器的性能。我们的PA扬声器由具有两个共振频率的pmut阵列组成，并使用“反相”驱动技术，从而实现高功率效率(高达71%)和宽平坦辐射带宽。我们还描述了PA声音的特性，这取决于用于调制可听信号的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A parametric array PMUT loudspeaker with high efficiency and wide flat bandwidth

A previous study demonstrated that a piezoelectric micromachined ultrasonic transducer (PMUT) could be used to construct a PA loudspeaker, and developed a prototype. In this paper, we describe the performance of a PA loudspeaker fabricated using a more developed package. Our PA loudspeaker consists of an array of PMUTs with two resonance frequencies and uses an `out-of-phase' driving technique, resulting in high power efficiency (up to 71%) and a wide flat radiation bandwidth. We also describe the characteristics of the PA sound, which depend on the method used to modulate the audible signal.

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2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)

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