喇叭作为汽车音响系统中必不可少的配件，在很多的喇叭单元中，我们都会看到防尘帽，主要作用就是防止尘灰颗粒跌入音圈，影响音圈以及喇叭单元的正常运作，那么防尘帽是否还有其他的作用呢？

1、济南汽车音响改装http://www.sdcarmusic.com/专家介绍喇叭防尘帽，在设计上也往往凹凸有别，防尘帽在结构上与相位锥其中一个最大的分别，就是防尘帽实际上是依附于音盆之上，随音盆一同振动活动，因而防尘帽从广义上而言实际上也属于“振膜”的一部分、同样也参与到发声之中，因而，其形状上的不同，自然也会直接导致喇叭单元发声特点的差异。
Jinan modified car stereo speakers dust cap experts in design often do not bump, dust cap on the cone structure and phase one of the biggest difference is that the dust cap is actually dependent on the cone, with the vibrating cone with activity, so the dust cap from the broad sense actually part of the "diaphragm", and also being involved in the sound, which, on its different shapes and natural sound will be a direct result of the speaker unit differences in characteristics.

2、对比凹形防尘帽与凸形防尘帽，一个很重要的差别就在于其振动模式以及由此而直接导致的共振程度的不同，而这些差异也就直接决定了两者在发声特性和频响曲线特性上的分别。
Concave and convex contrast dust cap dust cap, a very important difference in the different vibration modes and the extent of its resonance thus a direct result, and these differences will directly determine both the vocal characteristics and frequency ring on each curve characteristics.
    
3、济南汽车音响改装http://www.sdcarmusic.com/专家分析到凸形防尘帽会对喇叭单元的分割振动形成较强的抑制，同时也能够过滤掉一部分过量的高频信号，但同时其共振较大，因而其曲线峰值较大，也就是说频响曲线的平直性相对较差;而凹形防尘帽由于共振程度较小，峰值也相对较低，在曲线形态上可以做到比较理想的平坦度，因而也会有更加良好的指向性。而在音质上，使用凸形防尘帽的喇叭单元，声音会表现为更加柔顺入耳，但同时解析度和结像力也相对较弱，声音较为浑厚;而使用凹形防尘帽的喇叭，声音则是偏向清晰明亮，而同时也有较明显的圆润感。
Jinan car audio conversion expert analysis to split vibration convex dust caps speaker unit will form a strong inhibition, but also be able to filter out the excess part of the high-frequency signal, but its resonance is large, so its large peak curve , that straightness relatively poor frequency response curve; and concave protective cap due to the smaller degree of the resonance peak is relatively low, the curve shape can be done in the ideal flatness, and thus there will be more favorable directivity. And the sound quality, the use of convex dust caps speaker, the sound will behave as a more supple ear, but at the same resolution and knot strength is relatively weak, the sound is more vigorous; and the use of a concave dust cap speaker, the sound is biased clear and bright, but also a more obvious sense of mellow.