背景噪声

In an environment of 50±3dB background noise, with the audiometer developed by the authors, and an electric otoscope, the hearing of 195 infants aged 38 - 93 days in Beijing area were examined.

在背景噪声为50±3dB环境，使用作者自行研制的BA-33型听力筛查仪和电耳镜对195名北京市区38-93天的要儿进行检查。

Its main purpose is to reduce background noise.

它的主要目的是降低背景噪声。

Online monitoring of power system test signal contains a lot of background noise, not easy to detect.

电力系统在线监测中的检测信号含有大量的背景噪声，不便于检测。

It claims these can eliminate more than 90% of background noise.

它称其产品可以抑制90%的背景噪声。

Because of background noise, a lots of pre-processing algorithm are generated.

由于背景噪声的影响，衍生出了许多相应的预处理算法。

With digital hearing aids, background noise is a thing of the past.

随着数字助听器，背景噪声是过去的事情。

Analyzed the strut of the speech signal and the characteristic parameter and give two new algorithms.

在此基础上，分析了现有语音信号的结构特点和特征参数，提出了在较强背景噪声环境下的两种语音端点检测新算法。

This algorithm changes the detect points on the target trajectory to the respective curve in parameter space, which takes full advantages of the target detect data in a certain period, and the trajectory characteristics can also be picked up even under low SNR.

该算法把航迹上的观测点变换为参数空间的对应曲线，充分利用一段时间内的目标观测数据，在低信噪比下也能从背景噪声中提取目标的航迹特征，提高了声呐的检测概率，且对部分信息和数据的缺失不敏感。

High degree of sharpness and detectability of detail and little image background noise.

较高清晰度、可检测细节和较小图像背景噪声。

The fan-out angle of the line laser can reach the 62 degree, and energy efficiency exceeds 80%. In the background of strong sunlight , image acquisition and identification work still can be done well.

激光线的扇出角达62°，能量利用率达80%以上，在强烈的太阳背景噪声下仍然能进行图像采集和识别工作。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。