noise level是什么意思

网络释义

用法例句

Existing question for the environment noise standard and its revising;

浅谈环境噪声标准存在的问题与修订要点

This paper introduces the development and current status of some important noise standards about internal combustion engines in China.

主要介绍我国内燃机噪声标准的发展和现状,以及现行标准应用中应注意的问题,并对标准的制订和修订、贯彻与执行提出了对策和建议,旨在提高噪声测量与评价的质量,促进降噪工作的开展。

An optimal design criterion for parameters OFDM systems parameters under phase noise;

相位噪声条件下OFDM系统参数的优化设计

Performance analysis on the spatially correlated MIMO-OFDM systems in the presence of phase noise and channel estimation error;

存在相位噪声和信道估计偏差影响的空相关MIMO-OFDM系统的性能分析

Modified Leeson formula and low phase noise oscillator design;

改进的相位噪声公式与低相位噪声振荡器设计

A Calculation Method for the Output Noise Temperature of Standard Thermal Noise Source

一种热噪声标准源等效输出噪声温度的计算方法

Standard of aircraft noise for environment around airport

GB9660-1988机场周围飞机噪声环境标准

Acoustics--Determination of sound power levels of noise sources--Requirements for the performance and calibration of reference sound source

GB/T4129-1995声学噪声源声功率级的测定--标准声源的性能要求与校准

Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using a reference sound source

GB/T16538-1996声学声压法测定噪声源声功率级使用标准声源简易法

Acoustics--Determination of sound power levels of noise sources--Guide lines for the use of basic standards and for the preparation of noise test codes

GB/T14367-1993声学噪声源声功率级的测定使用基础标准与制订噪声测试规范的准则

This noise source can give a standard noise with an excess noise ratio up to & db. , the maxium possible error being ±0.2 db. .

表明这种噪声源可给出超额噪声比达8分贝的标准噪 声，误差不大于±0．23分贝。

The Effect of Impulse Noise on Man and Ifs Hygienic Standardization

脉冲噪声的卫生学调查及其卫生标准的探讨

A wideband low noise amplifier for multi-standard receivers

一种用于多标准接收机的宽带低噪声放大器

Standardized Mandarin Sentence Perception in Babble Noise Test Materials for Children

嘈杂语噪声下普通话儿童语句测听表的标准化

A SIMPLE METHOD FOR CALIBRATION OF UNDERWATER STANDARD NOISE SOURCE--PULSE METHOD CALIBRATION

校准水下标准噪声源的一种简易方法——脉冲校准法

The maximal limitation for noise outburst at night should not exceed15 db.

夜间突发的噪声，其最大值不准超过标准值15分贝。

Article 43 Noise level at the boundary of newly-constructed profit- making cultural and entertainment centers must be kept within the limits of environmental noise emission set by the State.

第四十三条 新建营业性文化娱乐场所的边界噪声必须符合国家规定的环境噪声排放标准；

DBRN (Decibels above Reference Noise)

超过基准噪声的分贝数

Study of Phase Noise Suppression Algorithm and Hardware Implementation of an OFDM System Based on IEEE 802.11a Standard;

基于IEEE 802.11a标准的OFDM系统相位噪声抑制算法及其硬件实现研究

Comparison New Standards with Old Ones in Application of Workers' Hearing Loss Diagnosis in Fiber Enterprises

新旧标准在化纤企业噪声作业人员听力损伤诊断中的应用比较

Several new issues on application of Diagnostic Criteria of Occupational Noise-induced Deafness

试述《职业性噪声聋诊断标准》在实践应用中的几个新问题

By 2008, the noise in the constructed urban areas should basically reach the national standard, the electric-magnetic radiation and radioactivity should be maintained complying with national standards.

到2008年城市建成区噪声基本达到国家标准。 电磁辐射和放射性环境继续符合国家标准。

By 2008, the noise level in urbanized areas will be reduced to meet the national standard and the electromagnetic radiation and radioactive environment will remain to be up to the national standard.

到2008年，城市建成区噪声基本达到国家标准，电磁辐射和放射性环境继续符合国家标准。