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- The Evaluation and Test on Interior Noise Level of GPS Receiver GPS接收机内噪声水平的评价与检测方法
- interior noise level 内噪声水平
- Structure of very low noise level. 低噪音结构。
- Noise level shall comply with the EU guidelines. 噪音级别应符合欧盟的指导方针。
- The noise level of air supply unit should be marked on the drawing. 机组要有噪声要求。
- Airflow system maximizes air volume at minimum noise level. 空气动力系统使加热器在最大出风量时将噪音降到最低。
- The quality of urban living has been damaged by excessive noise levels. 城市生活的质量已被过度的噪音所破坏。
- To reduce interior noise of a passenger compartment measures are taken in the propagation route and the accepter. 对于铁路客车车内降噪,主要从噪声源和传声途径两个方面采取措施。
- Measurement and analysis of medium bus interior noises. 乘用车车内结构噪声测量分析。
- Latest generation speed reducing gear pair (high efficiency, low noise level). 最新一代减速齿轮对(高效,低噪音)
- Regulation on noise levels on board sea-going ship. 海洋船舶噪声级规定。
- Then piezoelectric plate (PZT) is selected as actuator, ultimatum of active control on structural interior noise is another focus. 并分析了选用压电片作为激励器,进行箱内噪声主动控制的原理。
- The ultimate noise levels are the same. 最终的噪音水平是一样的。
- Noise level is higher, everyday concessional working hours is shorter. 噪声级越高,天天容许工作时间越短。
- This thesis gains a handy and exact testing and analyzing method on vehicle interior noise by designing three different testing means: immobile test, dragging test and road test. 设计了三种不同的试验工况:原地试验、拖行试验、道路试验,并用传递函数方法对试验结果进行分析,总结出一种简便准确的分析车内噪声传递路径的实验手段和分析方法。
- Based on coupled acoustic structural modal analysis method, its application in vehicle interior noise control is studied, and corresponding experimental system is developed. 本文在介绍结构-声场耦合模态分析方法的原理基础上,研究了该方法在车内噪声测试分析与控制中的应用与工程实现,并开发出了相应的测试分析系统。
- It is forbidden to manufacture,sell or import automobiles that emit noise beyond the limits set on noise level. 禁止制造、销售或者进口超过规定的噪声限值的汽车。
- 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。
- In this paper, we perform the jury evaluation experiment on 20 car interior noise samples using direct unidimensional rating at equal intervals, and also calculate their main psychoacoustic parameters using artemis software. 应用等间隔直接单尺度评分法对所采集的20个车内噪声样本进行了主观评价实验,并使用Artemis软件计算了其主要的心理声学参数。
- Feel relaxed - reduce noise level and bright lights. You may want to use soft music in the background. 放轻松一点-使周围保持安静并且点亮灯。你可以用一些柔和的音乐做背景。
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries