...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Acoustics >Improving low-frequency sound absorption of micro-perforated panel absorbers by using mechanical impedance plate combined with Helmholtz resonators
【24h】

Improving low-frequency sound absorption of micro-perforated panel absorbers by using mechanical impedance plate combined with Helmholtz resonators

机译：通过将机械阻抗板与亥姆霍兹共振器结合使用来改善微孔板式吸声器的低频吸声

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The traditional Micro-perforated plate (MPP) is a kind of clean and non-polluting absorption structure in the middle and high frequency and has been widely used in the field of noise control. However, the sound absorption performance is dissatisfied at low frequencies when the air-cavity depth is restricted. In this paper, a mechanical impedance plate (MIP) is introduced into the traditional MPP structure and a Helmholtz resonator is attached to the MIP. Mechanical impedance plate (MIP) provides a good absorption at low frequency by using mechanism of mechanical resonance and the acoustic energy is dissipated in the form of heat with viscoelastic material. Helmholtz resonator can fill in the defect of the poor absorption effect between the Micro-perforated plate (MPP) and the mechanical impedance plate (MIP). The acoustic impedance of the proposed sound absorber is investigated by using acoustic electric analogy method and impedance transfer method. The influence of the tube's length of Helmholtz resonator and the number of Helmholtz resonator on the sound absorption is studied. The corresponding results are in agreement with the theoretical calculation and prove that the composite structure has the characteristics of improving the low frequency sound absorption property. (C) 2016 Published by Elsevier Ltd.
机译：传统的微孔板（MPP）是一种清洁，无污染的中高频吸收结构，已广泛应用于噪声控制领域。然而，当限制气穴深度时，低频处的吸声性能不令人满意。在本文中，将机​​械阻抗板（MIP）引入了传统的MPP结构中，并将亥姆霍兹谐振器连接到该MIP上。机械阻抗板（MIP）通过利用机械共振机制在低频下提供了良好的吸收，并且声能通过粘弹性材料以热的形式消散。亥姆霍兹共振器可以弥补微孔板（MPP）和机械阻抗板（MIP）之间吸收效果差的缺陷。通过声电类比法和阻抗传递法研究了所提出的吸声器的声阻抗。研究了亥姆霍兹共振器的管长和亥姆霍兹共振器的数量对吸声的影响。相应的结果与理论计算吻合，证明了该复合结构具有改善低频吸声性能的特点。 （C）2016由Elsevier Ltd.出版

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号