Three types of ear plugs are available. Made of silicon-rubber for general noise from high-pitched to low-pitched noises or only for high-pitched noises. Made of flexfit, self-expandable and self-adjusting foam.
有三种类型的耳塞可供选择。硅橡胶制成,适用于从高音到低音的一般噪音或仅适用于高音噪音。采用柔性、可自我膨胀、可自我调节的泡沫塑料制成。