noise background的用法和樣例：
例句
- Wavelet filtering and averaging method are used to extract the weak VEP signal from strong background noise.
採用累加平均和小波濾波提取強雜訊背景下微弱的視覺誘發電位。 - In the presence of noise, it is difficult to restore exactly a signal distorted by a system having static,invertible, nonlinear characteristics.
在雜訊背景下，要想準確地恢復那些發生了非線性畸變的信號，通常是很困難的。
