background-noise level

基本解释

The impact is going to be most clearly noted when the background-noise level goes up, when you have to focus on what someone is saying.
这种听力丧失的影响在背景噪音水平上升时表现的最明显，此时你不得不集中注意力才能听清楚某人的讲话。
The paper discusses the importance of background-noise's level of decimeter wave-band on antenna and its basical technical condition and request.
论述了分米波段天线背景噪声电平测量的重要作用、基本条件和要求。介绍了其测量系统灵敏度的估值方法，及在工程上用定标的技术参数计算灵敏度的公式。
The paper discusses the importance of measuring background -noise's level of centimeter wave-band on antenna and its basical technical condition and request.
论述了厘米波段天线背景噪声电平测量的重要作用、基本条件和要求。介绍了其测量系统灵敏度的估值方法，及在工程上用定标的技术参数计算灵敏度的公式。