airborne noise

Portable pneumatic extinguishers Measurement of airborne noise at the operator's ear

便携式风力灭火机耳旁噪声的测定

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ISO7779 ( 1999) Acoustics – Measurement of airborne noise emitted by information technology and telecommunications equipment.

资讯及通讯设备的噪音量测技术。

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" We'll evaluate the airborne noise in there and the effects of all of the development changes that we made on the design as it exists," he explains.

“我们会评估空气和噪声的存在影响所有的发展变化，我们的设计，因为它存在，”他解释说。

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China is now capable of building the world's first underwater vacuum tube train, a futuristic form of transportation that can achieve supersonic speed and reduce airborne noise, according to Chinese academics and scholars.

据中国的学者和学术研究人员表示，中国现在有能力建设世界上第一条水下真空管列车--这种未来的交通方式，其速度可以超过音速、且能大幅度降低噪音。

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General method for measurement of airborne noise emitted by construction machinery and equipment

GB/T13802-1992工程机械辐射噪声测量的通用方法

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The noise indicators of ship include radiated noise, self noise, target strength and internal airborne noise.

舰船的噪声指标主要包括辐射噪声指标、自噪声指标、目标强度和舱室空气噪声指标。

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Measurement method of airborne noise emitted by marine diesel engine

GB/T9911-1988船用柴油机辐射的空气噪声测量方法

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The integrated environmental efficiencies of purification, stagnant dust, kill airborne microbe and reducing noise exerted by urban circulating forest were systematically monitored and analysed by installing monitoring spots and continually sampling for 5 days ( 3 times a day) in 3 function districts in Fushun City.

在抚顺市环城林带3个不同功能区，进行连续5天每天3次采样，对环城林净化、滞尘、杀菌和减噪的整体环境效应进行了系统的监测分析。

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Acoustics& Guide to standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings

GB/T14259-1993声学关于空气噪声的测量及其对人影响的评价的标准的指南

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When applied in airborne imaging surveillance, UWB random noise radars have their special merits.

超宽带随机噪声雷达在对空成像预警的应用中有着独特的优势.

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Therefore by earnestly studying in the wavelet analysis method, in view of the airborne target noise signal, the article adopts the wavelet soft threshold value to eliminate noises, obtains the satisfying effect.

因此本文在认真研究了小波分析方法的基础上，针对空中目标噪声信号，采取小波软阈值去噪方法，取得令人满意的效果。

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Household and similar electrical appliances-Test code for the determination of airborne acoustical noise-Part 2-7 : particular requirements.

家用和类似用途电器.气载噪声测定试验规程. 第 2-7 部分: 特殊要求.

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Airborne noise can be blocked by barriers ( walls, thick glass) or reduced by absorbers, such as foam insulators.

空降噪音可阻断障碍（墙，厚玻璃）或减少吸收剂，如泡沫绝缘体。

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However in the airborne sound system, due to particularities and restrictions on the use of the application, airborne audio noise reduction has always been seen by industry concern.

但是在机载音响中，由于应用的特殊性和使用上限制，机载音响的降噪一直以来都受到业界的关注。

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