摘要
提出了平板压电扬声器声学性能的量化描述方法,制备了多层压电陶瓷用于平板压电扬声器样品,并建立了样品的简化模型。阐述了声压级的有限元分析方法,进而取得了样品的声压级-频率曲线。通过声学测量设备Audio Precision得到的实验结果与仿真结果基本吻合,即最低谐振频率相差约150 Hz,平均声压级相差约2.5 dB,标准方差相差约0.9 dB,证明了这种仿真方法的有效性。
A quantitative description method on acoustic performance of panel piezoelectric loudspeaker was proposed in this paper.The panel piezoelectric loudspeaker sample was prepared by a kind of multi-layer piezoelectric ceramic,creating a simplified mode for the sample.A finite element analysis method of Sound Pressure Level（SPL） was provided to obtain Sound Pressure Level vs.Frequency curve（SPL spectrum） of the sample.Results of acoustic measurement by using Audio Precision agreed with the results of simulation.The gaps were 150 Hz,2.5 dB,0.9 dB on the first resonant frequency,the average sound pressure level and variance respectively,which verified the validity of the simulation method provided in this paper.
出处
《压电与声光》
CSCD
北大核心
2010年第6期978-980,984,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50621201)
国家"八六三"计划基金资助项目(2007AA03Z107)
教育部科技创新工程重大项目培育资金资助项目(708019)
国家"九七三"计划基金资助项目(2009CB623304)
关键词
平板压电扬声器
有限元分析
声压级
声学测量
panel piezoelectric loudspeaker
finite element analysis
sound pressure lever
acoustic measurement
