85问答库 > 发动机舱做防火墙隔音有效果吗

发动机舱做防火墙隔音有效果吗

2025-04-07 14:22:52
推荐回答（1个）
回答1：

发动机舱内做挡火墙隔音，可以阻隔发动机声音，尤其跑高速车速快时，更能体现出隔音效果。

低速噪音改善不明显是因为噪音传播并不像射出去的箭一样朝一个方向传，而是像炸弹爆炸一样四面八方扩散，所以在行驶速度慢时，发动机噪音辐射面较广，会通过机盖，翼子板，挡火墙U槽，车门，底板，玻璃等多个部位传入驾驶舱。然而当车速快时，发动机噪音会受到风的作用主要向后传声，所以这时材料才能发挥出真正的隔音作用，表现出更佳的隔音效果。

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