计权

在DSP中实现声信号的频率计权、时间计权与FFT频谱分析。

And the frequency weighting , time weighting and FFT are realized in DSP .

目的获取中国男性青年坐姿Z轴振动的频率计权曲线。

Objective To obtain the frequency weighting contour for seated Chinese young males in z axis .

提出了一种基于FFT技术的数字计权和系统误差修正新方法。

A new technique that is based on FFT is proposed .

不同来源的红骨髓分布数据对计算~（60）Coγ射线外照射下红骨髓剂量和干细胞计权剂量的影响

The effect of different sources of bone marrow distributions on red bone marrow dose and stem cell dose calculation under ~ ( 60 ) co γ, ray external irradiation

然后将得出的线性声压级数据导出到EXCEL中进行处理，得到了点场点的A计权声压级曲线。

Then exported the linear sound pressure level data into EXCEL , deal with it and got A-weighted sound pressure level curve in the points .

文章通过对A计权、B计权和C计权3种噪声计权网络频率响应函数的建模，得出了这3种频率计权函数的解析表达式。

In this paper , the method of three kinds of weighted networks ( A , B and C weight ) is established based on the study of their frequency response functions . Three weighting function expressions are derived .

对于室内噪声或声环境的评价，几十年来的实践表明，仅用A计权声级或NC数并不能完全表示这种噪声的主观（人的感知）属性。

The practice of the evaluation of in-door noise or acoustic environment in decades shows that the subjective perception of this ambient noise could not fully expressed by dB ( A ) or NC number .

根据ISO标准的基本数值，提出了用A-计权声级评价测听环境允许噪声，分析了不同测听内容和各种测听频率范围的噪声特征。

According to basic values of ISO standard evaluation of audiometric environment noise by using A-weighted sound level meter is proposed . Different audiometric contents and various frequency ranges are analyzed .

对噪声信号采用SoundandVibrationToolkit进行A计权网络滤波，然后进行连续A声级L（Aeq）计算，得出噪声舒适度等级；

And A-weighting analysis in Sound and Vibration toolkit are used for noises-signal . We can calculate the L_ ( Aeq ) of the sound , and then evaluate the grade .

典型的测试结果表明，在距轨道中心线35m处，最大计权声级为96dB（A）与101dB（C）。

The typical result shows the max sound level is 96 dB ( A ) or 101 dB ( C ) at the point of 35m from the center line of the track .

从分析处理所获得的数据得到了一些有意义的结果，它证明了计权等效连续感觉噪声级（WECPNL）不但在物理上，而且在心理上都是对机场周围飞机噪声有效的评价方法。

These results indicate that WECPNL is an effective measure of aircraft noise not only in physical but also in psychological evaluation .

结果测量发现聚苯乙烯造粒机、聚乙烯造粒机、休息室。控制室的A计权网络的等效声级均未超过有关的标准，而频谱分析则发现其主要的声强级均分布在200Hz以下。

Results The leq ( A ) did not exceed about criterion in polystyrene machine , rest room , control room , whereas most sound levels were distributed below 200 Hz by frequency analysis .

还对直升机噪声的几种评价标准进行了说明，以实测数据为例介绍了直升机噪声处理的常规方法，其中包括A计权、1/3倍频程及声暴露级SEL等的计算；

Moreover , a several of evaluation standards for helicopter noise are explained , and the general method for the helicopter noise data treatment is introduced which includes the calculations of A sound level , 1 / 3 octave and sound exposure exposrue level SEL .

现场噪声参数比较结果：锤锻声最大线性峰值（122.6～142.4dB）和峰值的变化以及A计权慢档均方根值（L（AS））的全距，均明显大于织布声；

The comparative results of noise parameter in the field were : The maximum linear peak ( 122.6-142.4dB ) , variability of peak and total range of A-weighted root-mean-square level with slow time constant ( LAS ) in the drop-forging noise were evidently greater than those in the weaving noise ;

结果所得到的振动频率计权在16～80Hz显著地大于ISO2631-1相应的频率计权（P<0.005），在其它频率上则无显著差异。

Result Compared with ISO 2631 1 , the frequencies weightings of Chinese young males at 16 ~ 80 Hz are significantly higher than those of ISO 2631 1 ( P < 0.005 ), but there are no significant difference between two frequency weighting contours at other frequencies .

用A&计权声级评价测听环境噪声

Audiometric Ambient Noise Evaluated by Using A & Weighted Sound Level

结果给出了手部、腿部受照部位及其周围组织的剂量分布，全身造血干细胞活存计权等效剂量为2.9Gy。

Results The dose distributions in the hand and leg are given .

用A计权连续小波变换识别内燃机噪声源

Using A-weighting CWT to identify internal combustion engine sound source

汽车主动悬架最优控制&采用频域计权形式性能指标函数

Optimal Control for Automobile Active Suspension Using Frequency-shaped Performance Index

一种便于编程的窄带噪声谱计权计算方法

A calculation method of noise frequency weight for convenient programming

虚拟式噪声分析仪中的数字计权和系统误差修正

Digit Weight and System Error Modification for Virtual Noise Analyzer

双重插值法噪声频谱计权计算及其误差分析

Double interpolation for the calculation of noise frequency weight and its error analysis

虚拟式噪声分析仪的数字计权与开发

Digit Weight and Development of a Virtual Noise Analyzer

非阻塞喷注噪声的A计权声功率的计算

Calculation of the A-weighting sound pressure of jet noise

不同频谱噪声在相同A计权声压级下的烦恼度研究

A study on annoyance under same A-weight pressure level of different frequencies noise

基于正交小波变换的计权声级测量

Weighted Sound Level Measurement Based on Orthogonal Wavelet Transforms

声屏障对交通噪声的A计权声插入损失

A-weighted Insertion Loss of a Screen against Traffic Noise

噪声测量中频率计权的实现

The realization of frequency weight in measuring noise

稳态响度听觉原理及A计权声级评价的缺点

Principle of steady state loudness hearing perception and drawback of A-weighted sound level evaluation

传统的噪声倍频程分析仪由硬件滤波网络和计权网络构成。

Traditional noise octave analyzers consist of filter network and weight network based on hardware .