可预测性并不是减少或消除噪音负面影响的唯一变量。
Predictability is not the only variable that reduces or eliminates the negative effects of noise.
如果有人知道他或她可以控制噪音的话，或许可以同时消除当下和后续的负面影响。
If the individual knows that he or she can control the noise, this seems to eliminate both its negative effects at the time and its after-effects.
工程师们努力钻研如何消音或隔音，再运用高技术材料消除环境噪音。
Engineers studied how to remove or block sounds, and applied high-tech materials to subdue ambient noise.
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