Sound Wave Interference in Speakers

Sound wave interference can change the loudness of sound when two waves meet. Sound waves may be modeled as longitudinal waves, where molecules move around an equilibrium position, or as pressure waves. When two identical waves from the same source overlap, their crests or troughs can add together. This is called constructiv...

干涉是一种两个或两个以上声波同时相互作用并产生一个新的合成波的过程。

若两个相位和频率相同的声波相互叠加，它们的振幅会得到增强，从而产生相长干涉。

另一方面，如果两个振幅相同的声波相位相差180°并相互叠加，则会产生相消干涉，导致完全抵消。

如今，干涉相消的概念已应用于具有主动降噪功能的耳机中，通过引入第二个声音，使其波峰和波谷与传入的噪声完全相反。