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优化单通道主动噪声控制性能在一个充满的窗口使用表面阻抗方法
Johann Kay Ann Tan1, Liangfen Du2, Siu-Kit Lau1
1Department of Architecture, National University of Singapore, 4 Architecture Drive, Singapore 117566, Singapore.
The Journal of the Acoustical Society of America
|February 23, 2024
概括
室内窗户中的主动噪声控制 (ANC) 显著降低了噪声,最佳的源位置实现了9.2dB的衰减. 双通道系统进一步提高了高达800Hz的性能.
科学领域:
- 声学 声学 在声学方面
- 机械工程 机械工程
- 建筑科学 建筑科学
背景情况:
- 窗户可以成为建筑物中噪音传输的重要来源.
- 有效的降噪策略对于改善室内声学舒适度至关重要.
- 主动噪声控制 (ANC) 提供了一种潜在的解决方案,可以通过全体会议窗户减轻噪声.
研究的目的:
- 研究在全体窗户设计中实施和优化主动噪声控制 (ANC).
- 确定控制源的最佳位置,以最大限度地提高ANC性能.
- 在全体会议窗口中评估单通道和双通道ANC系统的有效性.
主要方法:
- 使用表面阻抗方法 (SIA) 模拟单通道ANC配置.
- 在全体会议窗口内系统地搜索最佳的控制源定位.
- 使用实时ANC系统和缩放的全体会议窗口进行实验验证.
主要成果:
- 最佳的单通道ANC配置在200-630Hz之间实现了平均9.2dB的衰减.
- 发现错误传感器的位置对于ANC系统的性能来说并不关键.
- 一个双通道ANC系统将有效控制扩展到大约800Hz,平均衰减7.6dB.
结论:
- 表面阻抗方法 (SIA) 是优化全室窗户ANC系统的一个有用工具.
- 控制源的战略位置是最大限度地减噪的关键.
- ANC技术可以有效地提高音响舒适度,通过减少通过席面窗口传输的噪音.
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