Hemispherical breathing mode speaker using a dielectric elastomer actuator
Hemispherical breathing mode speaker using a dielectric elastomer actuator
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DOI：
10.1121/1.4934550
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发表时间：
2015-10-01
影响因子：
2.4
通讯作者：
Maeda, Shingo
中科院分区：
文献类型：
--
作者：
Hosoya, Naoki;Baba, Shun;Maeda, Shingo
虽然室内声学特性应该理想地通过使用点声源测量混响时间来评估，但是通常使用在底盘上具有多个扬声器的正多面体扬声器。然而，如果扬声器的尺寸相对于目标声场大，则这种配置不是点声源。本研究探讨一种小型轻量型扬声器，其使用介电弹性体致动器以呼吸模式（脉动模式，例如气球的膨胀和收缩）振动。声学测试方面的可重复性，声压，振动模式剖面和声辐射模式表明，介电弹性体扬声器可能是可行的。(C)2015年美国声学学会
Although indoor acoustic characteristics should ideally be assessed by measuring the reverberation time using a point sound source, a regular polyhedron loudspeaker, which has multiple loudspeakers on a chassis, is typically used. However, such a configuration is not a point sound source if the size of the loudspeaker is large relative to the target sound field. This study investigates a small lightweight loudspeaker using a dielectric elastomer actuator vibrating in the breathing mode (the pulsating mode such as the expansion and contraction of a balloon). Acoustic testing with regard to repeatability, sound pressure, vibration mode profiles, and acoustic radiation patterns indicate that dielectric elastomer loudspeakers may be feasible. (C) 2015 Acoustical Society of America