汽车行驶过程中总会产生各种噪音，越老的汽车，发出的噪声越大。这是因为汽车自身状况与噪音的产生息息相关，使用时间一长，零部件老化，噪音也就越来越明显。
汽车噪音会让车内人员感到焦躁不安，影响我们的乘车感受。如何才能降低汽车的噪音，安安静静地开车呢？
汽车噪音来自哪里
汽车噪音的产生有内部与外部两大原因。外部原因在于摩擦，行驶时轮胎与地面之间的摩擦，挤压胎面花纹之间的空气，就会产生胎噪。高速行驶时车身与空气的摩擦，会形成风噪。
内部原因在于“缝隙”，密封性差就无法有效阻止噪音进入车内。例如轮胎与车身之间的缝隙、后备箱缝隙、中控台缝隙等，狭小缝隙甚至还会放大噪声。
汽车内部众多的零部件，工作时产生的声音也不小，这些声音也会通过车身缝隙进入车内。
发动机：安装隔音棉
发动机开始运转时，内部零部件工作中总会产生较大的声音，这是无法避免的。这些声音通过引擎盖、挡风玻璃、中控台，传入到车内形成噪音。
源头的发动机不可能改变，只能从传播路径上降噪。在引擎盖下安装隔音棉，利用吸音材质吸收部分声音，同时减少引擎盖的振动，达到降低噪音的效果。
中控台安装密封条，隔绝引擎盖与中控台之间的联系，降低中控台的振动。中控台缝隙原本会对噪音起到放大效果，现在也被堵住了。
除胎噪：清理胎面杂物
汽车轮胎是车内噪音的主要来源之一，降低胎噪必不可少。在汽车行驶时，汽车轮胎与地面的摩擦，会产生各种细微的声音。尤其是刹车，或者路面沙石较多时，声音更为明显。
最便捷的方法，是更换防噪轮胎。但如果你不想换轮胎，可以定时检查，将卡在轮胎花纹之间的石子、杂物清除干净，避免行驶时石子与路面碰撞产生噪音，达到静音的效果。
再除胎噪：安装隔音棉
轮胎是汽车噪音的“重灾区”，除了降低轮胎自身产生的噪音，声音的传播路径也需要防范。
挡泥板与后备箱是最接近轮胎的两个位置，在这两个位置安装隔音棉，吸收轮胎噪音，减少进入车内的声音，能够有效降低车内噪音。
汽车噪音不仅会影响我们的心情，也会对我们及时应对突发情况产生干扰。在安静的环境下开车，舒心也舒服。处理事务或者享受驾车体验，也更为方便。
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