| 1. | A new fast digital filter of on line eddy current testing system for decreasing the effect of high frequency noise was researched
摘要针对涡流在线检测系统中的各种高频噪声影响，设计了快速去噪滤波算法。 |
| 2. | The large c1 cap rolls off the gain of the regulator starting at a low frequency so that high frequency noise isn ' t amplified by the error amp
这个大的电容c1从一个较低的转折频率开始滚降，所以高频噪音没有被误差放大器放大。 |
| 3. | It is concluded that flp is better than other two filters in reducing the arw , constraining the high frequency noise and reserving the low frequency useful signals
对比的结果表明, flp滤波方法能有效地抑制高频噪声,并保留陀螺信号的有用的低频量。 |
| 4. | The high frequency noises from analog video signal are quantified into digital image . such noises are needed to be weakened or eliminated because they will interfere in eigenvalue identify sequentially in track performance
模拟视频信号包含的高频随机噪声被量化到数字图象中,将影响特征识别进而影响跟踪性能,需要通过数字滤波的方法进行削弱和滤除。 |
| 5. | The detecting accuracy of the beam drift would be improved , as a high performance acoustooptic modulator modulates the frequency of the laser beam drift signal far away from the power frequency , the double power frequency and high frequency noises
具体包括: 1 .利用声光调制器将光束漂移量信号调制到远离工频及其倍频干扰和高频噪声的频带段,以期提高光束漂移量的检测精度。 |
| 6. | This design is based on the wireless monitoring system of yantai city streetlight , and is mainly about improvement of present system in hardware and software parts . with advanced mcu , this system applies fft to filter high frequency noise
本设计对原有路灯rtu软硬件重新设计，硬件电路从元件选型到电路结构设计都做了重大改进，由于采用高性能微控制器，软件中采用fft计算输入交流信号有效值。 |
| 7. | The turbocharger noise is formed by the rotation noise resulting from the periodical air cutting of the fan blade and the turbulent noise of high - speed gas flows . as a continuous high frequency noise , it mainly falls between the 500 to 10 000 hz range
涡轮增压器的噪声是由于叶片周期性地切割空气产生的旋转噪声和高速气流形成的湍流噪声而形成的，是一种连续性的高频噪声，主要分布在500 ~ 10000hz的频率范围。 |
| 8. | By integrating conventional fourie transformation with the smooth average method of spectrum , the high frequency noise was not only removed , but also the signal was smoothed and the main frequency of the signal was found easily and then was extracted as the coarse features of the signal . on the basis , in order to analyze the detail features of the signal , the signal can be decomposed using the db6 mother wavelet function
在谱分析方法的傅立叶变换中引入平滑平均法对蜂窝结构材料和纤维增强材料声-超声检测信号进行处理，不仅可以有效地去除信号的高频噪声，而且可以平滑信号，突出检测信号的主频，实现了对检测信号“粗信息”特征的提取；在此基础上，合理选用db6小波基函数，对信号进行小波分解，对信号的特征进行进一步的细微分析。 |
| 9. | At the same time , when the gas flow passes the flow area of the inlet valve at a high speed , turbulent throw - outs will appear and lead to the generation of high frequency noises . as the flow area of the inlet valve keeps changing , the turbulent noise is of fixed frequency range ( generally over 1 000 hz )
与此同时，当气流以高速流经进气门流通截面时，产生湍流脱体，导致高频噪声的产生，由于进气门通流截面是不断变化的，因此湍流噪声具有一定的频率范围，主要集中在1000hz以上的高频范围。 |
| 10. | An under estimation of the hearing effects by the low frequency noise could be happened . that is to say , even if the a - weight sound level is small , the low frequency noise may annoy to listener by the different ways from the high frequency noise . so it is necessary to understand psychoacoustics in order to make noise quality evaluations that match the subjective experience of the purchaser
同时应用主观评价方法?成对比较法( paircomparisonstatisticalevaluationmethods )对不同家用空调器噪声进行主观评价试验，并与客观评价结果进行了对比，结果表明：人主观响应(烦躁程度)与各心理声学评价指标之间均具有很高的相关性，相关系数一般均大于0 . 9 ，而与a计权声压级之间的相关系数只有0 . 78 。 |
