窄缝的声阻抗严格公式以及低频近似公式都存在。
The exact formulae of the acoustical impedance of a narrow slit and its low-frequency approximation are available.
界面的反射系数取决于界面两侧岩石的声阻抗差。
The reflection coefficient of an interface depends on the contrast in acoustic impedance of the rock on either side of the interface.
畸变产物耳声发射；声阻抗；高危新生儿；听力筛查。
Distortion - product Otoacoustic Emission (DPOAE); Impedance Audiometry; risk newborn; Hearing screening.
对现场测量管道声衬声阻抗的双传声器法进行了研究。
The two-microphone method is investigated for the objective of in situ measuring the impedance of an acoustic liner in a duct.
本文提出一种为计算法向声阻抗率而设计的专用列线图。
A special nomograph designed for calculating the normal specific acoustic impedance is proposed.
本文对微穿孔板的非线性声阻抗率作理论与实验两方面的研究。
In this paper, the nonlinear acoustic impedance of the micro-perforated panel is investigated both theoretically and experimentally.
本文介绍一种声遥测海底平面层系声阻抗分布的模拟实验结果。
This paper presents the results obtained in the model experiments on the remote measuring of the acoustic impedance profile of a sea-bottom consisting of horizontal layers.
在综合了回声法和频谱振幅比法优点的基础上，提出等效声阻抗法。
Based on synthesizing advantages of the pulse echo and spectral ration techniques, a new method, the equivalent acoustic impedance technique is proposed.
本文基于一维波动方程，提出了一种层状介质声阻抗剖面的重建算法。
Based on 1-d wave equation, a reconstruction algorithm of layered acoustic impedance profile has been established in this paper.
在高声强下测量了微圆孔处声激发射流的速度和微圆孔的非线性声阻抗。
Both the velocity of the sound-excited jet flow at a small circular orifice and the nonlinear impedance of the orifice are measured at high sound intensity.
从声阻抗测试看声顺值的大小和鼓室压曲线类型与听力改善关系不甚明显。
The impedance audiometry test showed the hearing improvement had no definite relationship with compliance value and tympanometry curve.
结果：硬质耳内窥镜诊断阳性398耳，声阻抗鼓室图诊断阳性400耳。
Results:The diagnosis result was positive in398ears by hard ear endoscope, the diagnosis result was positive in400ears by tympanogram.
声学中，速度与密度的乘积就是阻抗，也称为声阻抗或波阻抗，用符号Z表示。
In acoustics, the product of velocity times density, also called acoustic impedance and symbolized by z.
为了产生行波声场和形成高声阻抗，从热声网络的观点建立了系统的简化模型。
To create the traveling-wave phasing and high acoustic impedance, a simplified model of the system is constructed from the view of acoustic network.
综合无流、有流情况下穿孔板声阻抗的近似公式，给出穿孔元件声阻抗新模型。
Based on the numerical results, the curve-fitting expressions for the acoustic impedance of perforated plates with cross flow and grazing flow are obtained.
本文根据严格的声学理论，分析了圆柱面上小孔端面由于辐射所产生的声阻抗率。
In this paper, the acoustic impedance caused by the sound radiation at the terminals of the aperture, which is laid on the cylindrical surface, is analysed on the base of rigorous sound theory.
本文利用豚鼠研究了脉冲噪声和空气冲击波暴露后中耳声阻抗的变化和听阈偏移。
Acoustic impedance changes and hearing threshold shifts after exposure to impulse noise or air-blasts were studied in guinea pigs.
为油气碳氢检测，测井速度标定，声阻抗及演，模型正演等提供了有价值的数据。
It provided suefull data for hydrocarbon testing, well logging velocity calibration, sonic impedance inversion, and modelling and is significant for guiding oil-gas exploration of this area.
介绍了一种智能化声阻抗中耳功能分析仪的测试原理，仪器组成， 系统的主要功能等。
This thesis introduces the measuring principle, device composition and main functions of an intelligent acoustic impedance middle ear analyzer.
目前电阻率和氯离子浓度异常、氯离子剖面以及声阻抗测井数据均可预测水合物饱和度。
At present, electric resistance, chloride ion concentration anomaly, chloride ion profile and acoustic impedance logging data can be used to predict the gas hydrate saturation.
它能定量地反演出各层状介质的声阻抗值及分层位置，以重建层状介质的声阻抗剖面图。
The algorithm can quantitatively reverse the acoustic impedance value and layered place of layered media to reconstruct the acoustic impedance profile of the layered media.
目前电阻率和氯离子浓度异常、氯离子剖面以及声阻抗测井数据均可预测水合物饱和度。
At present, electric resistance, chloride ion concentration anomaly, chloride ion profile and acoustic impedance logging data can b...
该结构提供了一个集总声阻抗具有声波电阻与频率成正比，和声学惰性是与频率成反比。
The structure provides a lumped acoustic impedance having an acoustic resistance proportional to frequency, and an acoustic inertance that is inversely proportional to frequency.
作为一种客观的诊断方法，耳声阻抗测量仪在临床耳疾和听力障碍诊断方面具有重要地位。
As an objective diagnostic method, aural acoustic impedance measuring device holds a very important position in diagnosing ear diseases and hearing obstacles.
阐述了用声阻抗法实时监测薄膜沉积的原理，介绍了一种使用个人计算机的实时测控系统。
A computerized system has been developed for real time, in-situ monitoring and control of thin film growth by deposition.
对于由膜组织和液体构成的眼球来说，由于其超声阻抗差别不大造成眼超声成像的对比度不高。
For the eyeball composed of membrane and liquid, the contrast of ultrasound imaging is not high due to its small variance in acoustic impedance.
声波去耦层的声阻抗和厚度决定该声波去耦器的声阻抗，并因此决定DSBAR器件的通带宽度。
The acoustic impedances and thicknesses of the acoustic decoupling layers determine the acoustic impedance of the acoustic decoupler, and, hence, the pass bandwidth of the DSBAR device.
对于砂岩储层，含气砂岩的声阻抗比含油和含水砂岩的声阻抗低，利用这种差异可以直接识别储层中气体。
For sandstone reservoir, the acoustic impedance of gas-bearing sandstone is lower than that of oil - and water-bearing sandstone, gas in reservoir may be directly recognized by using this difference.
如果我们测得地震波的走时和振幅，我们就能够确定地下的几何形状并估算与岩石速率和密度有关的声阻抗。
Seismic measurements of travel time and amplitude define the subsurface geometry and give estimates of the acoustic impedances related to rock velocities and densities.
如果我们测得地震波的走时和振幅，我们就能够确定地下的几何形状并估算与岩石速率和密度有关的声阻抗。
Seismic measurements of travel time and amplitude define the subsurface geometry and give estimates of the acoustic impedances related to rock velocities and densities.
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