noise level

Using frequency in speed adjustment to achieve flexibility, asmoothniess and low noise level in speed adjusting.

采用变频调速,速度调节灵活 、 平稳、低噪.

The internal noise level becomes the important index of weighing the grade level of the automobile.

车内噪声水平成为衡量汽车档次高低的重要指标。

Discussion on Causes for Rise of Noise Level in Area Protected by Road Noise-barrier

道路声屏障保护区噪声级上升原因的探讨

Make whatever adjustments you need to the lighting, temperature, noise level, and other controllable factors in your office.

你可以适当调节你的工作环境，包括灯光、温度、噪音水平及其他可控因素。

Steve Krug, in his book Don't Make Me Think, encourages website managers to "Get rid of half the words on each page, then get rid of half of what's left." This will reduce the noise level on each page and make the useful content more prominent.

史蒂夫·克鲁格，在他的著作《Don’t Make Me Think》中，鼓励网站管理员“去掉每页上一半的话，然后再去掉剩下的一半”。这将降低噪音水平，并让有用的内容在每一页上都更突出。

Two thresholds ( called high threshold and low threshold) are determined based upon the noise level, image contrast and other factors.

掩码边缘的计算过程中包含两个阈值（称为高阈值和低阈值）的确定。其中高阈值是全局阈值，与图像的噪声、对比度等参数有直接关系。

Systematic noise testing of an enclosed plant with various modifications based on in-situ experimental work, and tests on cooling air intake and exhaust systems, etc, in an acoustic laboratory, a noise level of 70 dB ( A) was obtained for the plant.

在一个声学实验室内，对经过多种试验性改进的隔声机组上，进行了系统噪声试验和冷却空气吸入和排出系统等的试验，从此机组测得了70dB（A）的噪声值。

Effect of Background Noise Level on Measurement

噪声背景值对噪声监测结果的影响

This paper details the synchronous clock principle. Also described are the relationship between the noise level and the distance, the position of the target ship to the hydrophone and errors of distance measurement.

本文较详细的介绍了同步钟测距原理，并对在舰船辐射噪声测量中噪声组与距离关系，目标船相对测量水听器的位置，测距误差等进行了描述。

For improving the motion characteristics of stator and hence reducing the noise level and enhancing the performance and service life of power steering pump, a reverse method is used for curve fitting of stator contour according to the manufacturing technologies of stator.

根据定子加工工艺现状，采用反求法对定子曲线进行拟合，改善了定子的运动特性，从而降低了泵的噪声，提高了泵的性能和寿命。

With the treatment of acoustic measures of noise elimination and sound insulation, the reducing of noise level at enter port and operating point exceeds 33dB ( A) and 10 dB ( A) respectively, this comes to the desired results.

经消声、隔声等声学措施后，进风口和工人操作点的噪声强度分别降低33和10dB（A）以上，达到了预期的效果。

Thus as the signal level drops, the higher frequencies are progressively more strongly filtered, which also filters the constant background noise level.

也就是说随着信号等级降低，高频声音越来越多被过滤，静态的背景噪音也被过滤。

Noise level, temperature and aromas are all under your control.

噪音，温度以及气味程度，一切都掌握在你的手中。

The sound is thus recorded at a higher strength on the tape relative to the tape's noise level.

这样相对于磁带的噪音，磁带记录的声音得到增强。

The portion of fiber mask obtained with the high threshold depicts the main character of fiber mask. In order to improve the continuity of mask edge and depress the noise output, the background noise level is evaluated for each image.

通过高阈值计算得到的结果确定了各纤维的轮廓的主要部分。为了提高纤维掩码的连续性以及最大限度地降低噪声输出，本文对图像的背景噪声进行评估。

A New Method to Measure The Radiated Noise of Low Noise Level Submerged Targets

低噪声水下目标辐射噪声测量的新方法研究

This paper shows how to redesign the building acoustic sound insulation lab without altering its function and structure to gain a reverberation environment of which the background noise level is lower than 15dB ( A) when the ventilation system is working.

文章重点介绍在机械通风和不影响建筑隔声实验室原有的实验功能与结构的前提下如何对建筑隔声实验室进行改造以获得背景噪声低于15dB（A）的混响场实验环境。

To reduce combustion noise of the long-flame oxy-oil burner, some effective measures were taken to stabilize the combustion process at the burner exit. Thereby the noise level of the burner is reduced to that of conventional oil burner.

为了降低长焰氧油枪的燃烧噪音，采用一些行之有效的措施，使燃烧过程能稳定地于枪口开始，燃烧噪音降低到与油枪接近的水平。

Prediction and Software of Wayside Noise Level of High Speed Railway

高速铁路沿线噪声的预测计算及软件开发

The results showed that the noise level of different tires could be evaluated through the noise measurement in the reverberation laboratory;

研究表明，混响室内的噪声测试可以辨别不同轮胎的噪声声级；

Sleep experiments were done in 6 subjects under 3 conditions. ( 1) Quiet, background noise level lower than 45dB ( A);

为探讨在噪声环境中的睡眠防护问题，设计了三种状态的睡眠实验：（1）安静状态，背景噪声低于45dB（A）；

In the process of designing a sensor, principle detect loud noise level index of Piezoresistive sensor is used in this thesis.

在传感器的设计过程中，本文采用压阻原理检测高声级指标的噪声传感器。

The result shows that the power spectrum time functions ( PSTF) can discriminate precursors before moderately strong earthquakes, which close to noise level, from the original data.

结果表明，30d、120d、240d周期的功率谱时间函数，能在原始观测资料中识别出接近噪声水平的中强地震前兆信息。

Conventional methods cannot work well in the condition of low SNR or at a variable background noise level.

常规的检测算法在低信噪比尤其在背景噪声能量可变的环境下不能有效工作。

The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.

声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。

A Cornell study, cited by the New Yorker, also found that workers who were exposed to the noise level of an open office for three hours had higher levels of the hormone known as adrenaline, which is associated with the body's stress response.

《纽约客》杂志引用的一项康奈尔研究也发现，处于嘈杂的开放式办公室长达3小时的员工更容易出现肾上腺素增高，而该激素和人体压力大有关联。

The background noise level of this instrument under the condition of conducted disturbance and disturbance power test is provided.

讨论了监测待测物使用工况的必要性，给出了电流参量测试仪的传导骚扰和骚扰功率的背景骚扰电平。

The gravity observation residuals and station background noise level are also investigated.

文章还研究了重力观测残差和台站背景噪声水平。

Quality gears smooth operation and low noise level.

采用优质齿轮,运转宁静.

Monitoring capacity of station ( station network) not only depends on instrument performance, but also is related with background noise level of station base.

台站（台网）的监测能力不仅取决于仪器的性能，而且还与台基的噪声背景有关。