噪声与振动控制Issue(5)：167-171,5.DOI:10.3969/j.issn.1006-1335.2015.05.035
基于微振动理论单罩杯双自由度耳罩隔声模型
An Acoustic Model for Single Cup and Double Degree of Freedom Earmuffs Based on Micro Vibration Theory
摘要
Abstract
A single cup earmuff was simplified to a single cup and double degree-of-freedom vibration model. The model reveals the influence of earmuff’s stiffness, damping, mass, volume and foam absorption material on the sound insulation performance of the earmuffs. It shows that increasing the cup stiffness and reducing the stiffness of the absorption material in the cup are helpful for improving the sound insulation performance of the earmuffs. Higher damping coefficient of the cup can lead to smaller system resonance peak and better sound insulation performance in the low-frequency range. Smaller damping coefficient of sound absorbing material is better. Larger earmuff’s mass or volume can effectively improve the sound insulation performance of the earmuffs, but will reduce earmuff’s comfort.关键词
振动与波/双自由度/耳罩/隔声Key words
vibration and wave/double degree of freedom/earmuffs/sound insulation分类
数理科学引用本文复制引用
李中付,丁猛..基于微振动理论单罩杯双自由度耳罩隔声模型[J].噪声与振动控制,2015,(5):167-171,5.
