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喇叭作為汽車音響系統中必不可少的配件，在很多的喇叭單元中，我們都會看到防塵帽，主要作用就是防止塵灰顆粒跌入音圈，影響音圈以及喇叭單元的正常運作，那么防塵帽是否還有其他的作用呢？

1、濟南汽車音響改裝http://www.szanyuda.com/專家介紹喇叭防塵帽，在設計上也往往凹凸有別，防塵帽在結構上與相位錐其中一個最大的分別，就是防塵帽實際上是依附于音盆之上，隨音盆一同振動活動，因而防塵帽從廣義上而言實際上也屬于“振膜”的一部分、同樣也參與到發聲之中，因而，其形狀上的不同，自然也會直接導致喇叭單元發聲特點的差異。
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、對比凹形防塵帽與凸形防塵帽，一個很重要的差別就在于其振動模式以及由此而直接導致的共振程度的不同，而這些差異也就直接決定了兩者在發聲特性和頻響曲線特性上的分別。
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、濟南汽車音響改裝http://www.szanyuda.com/專家分析到凸形防塵帽會對喇叭單元的分割振動形成較強的抑制，同時也能夠過濾掉一部分過量的高頻信號，但同時其共振較大，因而其曲線峰值較大，也就是說頻響曲線的平直性相對較差;而凹形防塵帽由于共振程度較小，峰值也相對較低，在曲線形態上可以做到比較理想的平坦度，因而也會有更加良好的指向性。而在音質上，使用凸形防塵帽的喇叭單元，聲音會表現為更加柔順入耳，但同時解析度和結像力也相對較弱，聲音較為渾厚;而使用凹形防塵帽的喇叭，聲音則是偏向清晰明亮，而同時也有較明顯的圓潤感。
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.