Aircraft noise is unwitting of passengers.
飞机噪音是旅客不明智所至。
Therefore, the use of aircraft noise in the production of small, vibration-free.
所以该机在生产过程中噪音小、无振动。
Aircraft noise is a particular problem here since we're close to Heathrow Air port.
在这儿飞机噪音是个严重的问题，因为我们离希斯罗机场很近。
Planes would fly in from the north-east, primarily over water, greatly reducing the number of homes that would be affected by aircraft noise.
飞机将在东北部起降，主要途经水面，受飞机噪音污染的家庭数目由此极大地减少。
The measurements of aircraft noise around several airports and survey on reactions of people to aircraft noise were taken in 1984 and 1985.
1984年和1985年在几个机场对飞机噪声进行了测量，并向居民就对飞机噪声反应进行了社会调查。
The paper put forward the aircraft noise inside airfield evaluation method based on double indexes according to the character of military aircraft noise.
根据飞机噪声影响的特点，提出了一种基于双指标的机场内部飞机噪声评价方法。
This new system unifies the evaluation of aircraft noise and other environment noise effectively, and adds a new evaluation index single-event noise exposure level.
飞机噪声的共性决定其评价体系应于环境噪声评价体系统一，而飞机噪声的个性决定其评价方法必须有别于一般环境噪声评价。
Sound-level meter by its simple, convenient, the cost is low, the precision higher a series of merits, become one of aircraft noise measurement aspect main metering equipment.
声级计以其简单，方便，成本低，精度高等一系列优点，成为航空器噪音测量方面主要的测量仪器之一。
According to the standard of aircraft noise environment around Airport (GB9660-88), LWECPN (Weighted Equivalent Continuous Perceived noise Level) is selected as noise metrics.
根据《机场周围飞机噪声环境标准(GB9660- 88)》，以计权等效连续感觉噪声级LWECPN作为机场噪声评价量。
A boundary element model is established, making use of the ANSYS. In the noise simulation SYSNOISE is applied to get estimable simulation results of aircraft noise close to ground.
建立了某型军用飞机的ANSYS边界元模型，用声学有限元-边界元仿真软件SYSNOISE进行了噪声仿真，获得了飞机噪声在地面附近的辐射结果。
According to the requirement of aircraft noise certification of CCAR and the foundation of aircraft prediction, a program system for aircraft noise prediction (ANPS) has been developed.
根据中国民航规章中有关飞机适航噪声审定的要求和噪声预测原理建立了飞机噪声预测系统软件。
Although the number of residents affected by aircraft noise has decreased sharply over the past two decades, as planes have become quieter, it still affects over 200,000 people (see chart).
在过去的二十年里，飞机飞行逐渐变得安静，受机场噪音干扰的居民人数虽已急剧减少，但仍有20万居民受其影响(见表)。
The aircraft cost 25 million pounds and can carry heavier loads than huge jet planes while also producing less noise and emitting less pollution.
这架飞机造价2500万英镑，可以比大型喷气式飞机承载更重的载荷，同时产生更少的噪音，排放更少的污染。
‘If you travel as much as we do, you appreciate the improvements in aircraft design of less noise and more comfort, provided you don’t travel in something called economy class, which sounds ghastly.’
2002年对飞机研究中心的人说：如果你们和我们一样时常需要到处飞，你就会感激飞机设计上的巨大进步：更少噪音、更多舒适。
All other aircraft make a terrible noise.
别的飞行器都会发出可怕的噪音。
It does this by fitting small piezoelectric acoustic sensors to parts of the structure to detect the particular frequency of noise caused by a crack in aircraft-grade aluminium.
把小型压电声传感器安装到这种构造部位上，检测由航空级铝材裂纹所致的特定频率的噪音，靠这样就能监测飞机裂纹。
A companion research effort looked at concepts for a new generation of supersonic transport aircraft capable of meeting NASA's noise, emissions and fuel efficiency goals for 2030.
一项合作研究成果着眼于新一代超音速运输飞行器的概念，以满足NASA为2030世代设定的噪音、排放和燃油效率目标。
With a more aerodynamic shape and framed by a curved tail plane, these engines would make for a more streamlined aircraft, as well as directing most of their noise upward.
通过更加符合空气动力学的形状和一个曲线尾巴的飞机结构，这些发动机将使飞行更有效率，同时会将绝大部分的噪音传向空气上方。
A sonic boom is the thunder-like noise a person on the ground hears when an aircraft or other type of aerospace vehicle flies overhead faster than the speed of sound or supersonic.
音爆是当飞机或其它类型的飞行器以超音速飞过头顶时，地面上的人听到的类似雷声的噪音。
Objective To study the dose response relationship between noise exposure and prevalence of noise induced hearing loss(NIHL)in man aircraft maintenance workers.
目的探讨男性飞机维修人员噪声暴露与噪声性听力损失（NIHL）患病率之间的剂量反应关系。
Aircraft ground support equipment - General requirements - Part 4: noise measurement methods and reduction.
飞行器地面支持设备。一般要求。第4部分：噪声测量方法和噪声降低。
I don't like the noise of these jet aircraft, but I've learnt to live with it.
我厌恶这些喷气式飞机的噪音，但我已经学会去忍受它了。
In this paper the active noise control in cabin is discussed, and some successful examples are presented, such as active noise control in cabin of aircraft and of autocar.
首先讨论了有界空间的有源噪声控制，并给出了一些较为成功的舱室有源噪声控制实例。例如，飞机座舱内和小汽车座舱内有源噪声控制系统和它们的降噪效果。
Objective: to evaluate the impact of noise on cardiovascular and auditory systems of aircraft-made workers.
目的：探讨噪声对飞机制造工人心血管和听力系统的影响。
The results show that this method is efficient for determining the natural frequencies of the aircraft flight noise.
这种方法为确定飞行器飞行噪声固有频率提供了有效的途径。
The results show that this method is efficient for determining the natural frequencies of the aircraft flight noise.
这种方法为确定飞行器飞行噪声固有频率提供了有效的途径。
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