背景噪声

Base on clarity of authenticate elements of electronic evidence, deep understanding of format sand contents of digital audio, digital audio forgery tools and methods, from the audio analysis of Verifier-Tuple theory, we research on three main aspects: audio waveform statistical characteristics, incidental background noise characteristics, audio additional information.

在对电子证据的鉴定要素明晰的基础上，对数字音频材料格式内容深入的理解的基础上，对数字音频篡改工具及篡改方法认识的基础上，从音频分析的校验原组理论出发，分别在音频的波形统计特征方面、音频附带背景噪声的特征方面、音频格式附加信息方法方面进行检测方法研究。

So,we can weightily process the ultrasonic signal depend on the degree of the instantaneous order.

如何从背景噪声中提取出缺陷信号，提高信噪比一直是各国科研人员努力的目标。

Recordings from the STN exhibited an increase in the background activity and an irregular firing pattern, with a mean rate of (49±13) Hz. The mean cell density was (58±14) cells /mm, with an average length from upper bounder to lower bounder of (58±08) mm. The movementrelated cells were located primarily in the dorsolateral sector of the STN, with the leg area located medial along the mediolateral axis and centrally along the anteroposterior axis, compared with the arm area.

STN细胞电信号为高频、高幅及背景噪声较高的簇状放电，平均放电频率(49±13) Hz，平均细胞密度(58±14)个/mm，上、下界间平均长度(58±08) mm；运动相关细胞多位于背外侧部，下肢偏内侧，上肢偏外侧，亦可记录到&震颤同步细胞&。

The experiment shows that the method proposed above is very effective in enhancement of underwater laser imaging to restain background noise, clear object details and advance contrast.

通过实验，验证了该算法能达到抑制背景噪声、突出目标细节、提高对比度的效果，对水下激光图像增强十分有效。

The Logitech'snew webcamsare come with a background noise cancellation called RightSound, whichaimed to not only reduce peripheral sound but reduce echo as well.

罗技的新的Webcam来与背景噪声取消所谓的rightsound ，其目的是不仅减少了周边健全，但降低回音，以及。

The experimental results show that wavelet transform method may filter effectively the background noise, furthermore, may accurately locate the fault point in time and frequency domain. It is substantially different from the traditional FFT. This method is unfastidious to the physical model of machining process, has advantages over all kinds of time series analysis method.

实验表明，小波分析方法可有效屏蔽背景噪声的影响，进而可对故障点进行较准确的时频定位，这和传统的FFT分析方法有着本质的区别，同时对刀具破损的故障提取过程不过分依赖加工系统的物理模型，与各种时序分析方法相比，具有明显的优越性。

The substantial similarity of noise exists between the voiced and unvoiced regions in the same audio data.

在实际应用中，由于多种因素的影响，音频信号往往带有不同类型的背景噪声。

The tenet of Vibroseis seismic exploration is outputting as much energy through a continuous bestirring in a period of time as that outputted by other sources in an instantaneous time. The realization of this goal needs that Vibroseis can output a same sweeping signal in many times continuously, then overlap the reflect signal to eliminate the noise from the exploration background, finally visualize the structure of the stratum.

可控震源地震勘探的精髓便是通过系统长时间的持续激励来实现其它震源的瞬时高能量激励，实现这一目标的前提是要求震源系统能够完成相同扫描信号的多次无差别输出，进而通过地震仪进行相应的垂直叠加，充分压制背景噪声，凸现地下的有用构造信息。

The speech quality of the system degrades especially in the presence of heavy noise.

特别在强背景噪声情况下，系统的语音通信质量急剧退化。

Independent toxicologists contacted by New Scientist said Séralini's analysis overplays the importance of minor variations that most experienced toxicologists would consider to be random background noise.

新科学家》（New Scienctist，此文发表刊物）联系的独立毒理学家也说，Séralini的分析过分夸大了统计数据里的微小波动，对大多数有经验的毒理学家而言，这类波动只能算背景噪声。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。