影响扬声器纸质振膜动态力学性能的因素

The Factors Influencing the Dynamic Mechanical Properties of Paper Diaphragm of the Loudspeaker

研究了不同定量、不同浆料打浆度对扬声器纸质振膜材料动态弹性模量和损耗因子的影响,并对复合纸质振膜的动态力学性能进行了研究。结果表明,随着纸张定量的增加,浆料打浆度的提高,纸张的紧度和动态弹性模量升高,损耗因子下降。纸质振膜的复合结构影响其动态力学性能,与原纸相比,干法复合导致复合纸紧度和损耗因子均升高,湿法复合使复合纸紧度降低而损耗因子升高,无论干法还是湿法复合后,复合纸的动态弹性模量变化均不明显。

The elastic modulu and loss factor of diaphragm are closely related to the acouse characteristic of the loudspeaker.An ideal loudspeaker diaphragm requires higher elastic modulu and proper loss factor.In this work,the influence of paper cone grammage,beating degree of the pulp used for producing paper cone,and lamination structure of paper cone on dynamic mechanical properties of the paper cone was investigated.It was found that with the beating degree and basis weight increasing the elastic modulu of paper cone increased,while the loss factor showed an opposite trend.The lamination structure had an effect on the dynamic properties of the paper cone.Compared with the base paper,dry lamination derived higher density and loss factor and wet lamination derived lower density and higher loss factor.However,there was no significant change in elastic modulu whether dry or wet lamination method was used.