The mechanism for low noise asphalt pavement to lower tyre noise is analyzed. A acoustical model is put forward. The resonance frequency of sound wave is analyzed with Helmholtz resonator model.
分析了低噪声沥青混凝土路面降低轮胎噪声的机理，建立低噪声沥青混凝土路面的声学模型，用亥姆霍兹共振器模型分析计算了声波的共振频率。
Based on the sound absorption mechanism of Helmholtz Resonator, the advantage of soft tube length is fully used in the new structure, and thus the low-frequency noise can be controled easily.
提出了一种新型的宽频带共振吸声结构，该结构基于赫姆霍兹共振吸声机理，并充分利用了软管在长度上的优势，易于实现对低频噪声的控制。
Helmholtz resonators and quarter wave resonators are studied as the high frequency combustion instabilities suppression devices in liquid rocket engines.
本文针对抑制液体火箭发动机不稳定燃烧的声学装置——赫姆·霍兹声腔和四分之一波长管声腔进行了研究。
Helmholtz resonators and quarter wave resonators are studied as the high frequency combustion instabilities suppression devices in liquid rocket engines.
本文针对抑制液体火箭发动机不稳定燃烧的声学装置——赫姆·霍兹声腔和四分之一波长管声腔进行了研究。
应用推荐