noise threshold

例句：

1. 1. The noise threshold for the new hearing aids is significantly lower than that of the old ones.
   新助听器的噪声阈值显著低于旧的。
2. 2.The researchers found that the noise threshold for detecting a certain frequency was higher than previously thought.
   研究人员发现，检测某种频率的噪声阈值比之前认为的要高。
3. 3.The noise threshold for this type of equipment is very low, so it can be easily damaged by external interference.
   这种设备的噪声阈值非常低，因此很容易被外部干扰损坏。