In regular programming the intensity of sound varies over a large range.

在常规节目中， 声音的强度在很大范围内变化。

There was no intervention to protect the inner ear other than reducing the intensity of sound reaching it such as earplugs, which are not always effective.

除了降低到达内耳的声音强度（例如耳塞）外， 没有其他干预措施可以保护内耳，但耳塞并不总是有效。