随后它便产生逆向声波从而消除耳机信号中不需要的噪声。
It produces an inverted sound wave to cancel out unwanted noise in the headphone signal.
此处所提及的噪声就是超声波。
阵列声波测井时，井下噪声对于波形的影响是十分明显的。
The impact of noise on waveform is evident by using array sonic logging.
声波信号时延的准确估计是实现强噪声环境下声学法高精度测温的关键。
Precisely estimated time delay of acoustic wave signal is very important to implementing the most accurately measurement of temperature using acoustical method in the strong noise environment.
翻斗车也被称为分离器位于盘之间，他们减少空气和噪声波动。
Dumpers sometimes called as Separators located between platters, they reduce air fluctuations and acoustic noise.
阵列声波测井采用多个接收器配置，从而构成一个接收器阵列，这样可以有效压制噪声，提高数据处理精度。
Array sonic logging use multiple receiver, that would constitute an array receiver. which can effectively suppress noise. It may improve the accuracy of data processing.
文中重构了目标和海洋环境的噪声波形，模拟各类目标和环境噪声的波形，用于以后信号检测方法的研究。
In this paper, the waves of the signal and the sea noise have been reconstructed and simulated which can be used in the study of signal detecting method.
混响室是声学专业的实验室用房，它在测量声波无规入射时材料的吸声系数和测量噪声源的声功率级中得到了广泛应用。
In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.
目前，噪声的生物效应多集中于研究音频噪声造成的危害，而关于超声波清洗空化噪声对生物体生理机能影响的研究还未见报道。
Nowadays, studies on biological effects of noise are mostly focused on the effect of audio noise, but studies of the effect of ultrasonic cleaning noise on human haven't been found yet.
分析了低噪声沥青混凝土路面降低轮胎噪声的机理，建立低噪声沥青混凝土路面的声学模型，用亥姆霍兹共振器模型分析计算了声波的共振频率。
The mechanism for low noise asphalt pavement to lower tyre noise is analyzed. A acoustical model is put forward. The resonance frequency of sound wave is analyzed with Helmholtz resonator model.
布里渊散射带来的泵浦损耗和噪声，可描述为抽运波、斯托克斯波通过声波进行的非线性相互作用。
The pump wastage and noise brought by pump Brillouin scattering can be described by the nonlinear interaction of the Stocks wave which is carried by sound wave.
本文分别以白噪声及扫频信号为信号源，采用计算机仿真软件MATLAB，对声波在声发射端和接收端之间的飞渡时间的互相关估计进行了计算机仿真研究。
In this paper we separately use White noise and chirp signal as signal source, and apply simulate software MATLAB to research the time delay between the transmitted signal and the received signal.
在进行超声波传播时间检测前，对采样信号还进行了数字滤波算法以更好的消除噪声影响，提高检测精度。
Before test the ultrasonic propagation time, we also use the digital filtering algorithm in the sampled signal to better eliminate noise and improve accuracy.
对超声波信号检测采用本文提出的这种软硬件结合的预处理措施，结果显示能达到满足的抑制各种噪声和干扰的效果。
This combinational way of software and hardware to pre-process the receiving ultrasonic signals demonstrates the capacity to suppress noise and interferences efficiently.
本文通过对超声波医学图像去除斑点噪声的具体实例说明了它的应用。
Also, an experiment for medical ultrasound images to be removing speckle noise is to illustrate the application of 2-D DFT-DWT hybrid transform.
本文通过对超声波医学图像去除斑点噪声的具体实例说明了它的应用。
Also, an experiment for medical ultrasound images to be removing speckle noise is to illustrate the application of 2-D DFT-DWT hybrid transform.
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