acoustic impedance造句
(1) Specific acoustic impedance of transparent liquid, sound transmitting distance of laser induced sound and laser beam waist radius are analyzed.
(2) In this paper this idea is applied to acoustic impedance inversion using post stack seismic data.
(3) Acoustic impedance changes and hearing threshold shifts after exposure to impulse noise or air-blasts were studied in guinea pigs.
(4) Acoustic impedance section is a basic section used for reservior construction description and lateral prediction.
(5) 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.
(6) 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.
(7) The structure provides a lumped acoustic impedance having an acoustic resistance proportional to frequency, and an acoustic inertance that is inversely proportional to frequency.
(8) In acoustics, the product of velocity times density, also called acoustic impedance and symbolized by Z.
(9) Precise locating needs to detect the acoustic signal of the pipe leaks that has close relationship with the acoustic impedance of the leaks.
(10) This thesis introduces the measuring principle, device composition and main functions of an intelligent acoustic impedance middle ear analyzer.
(11) In geophysics, reflection refers to the seismic energy or signal that returns from an interface of contrasting acoustic impedance, known as a reflector, according to Snell's law.
(12) Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.
(13) They are characterized by ruggedness, light weight, high sensitivity, low acoustic impedance, easy conformability to complex surface, low cost and large bandwidth.
(14) Practice have showed that 4 D seismic can be successfully performed only when the change of acoustic impedance caused by fluid substitution is more than 4%.
(15) It is difficult for conventional reflection seismic surveys to get the information of low velocity layers underlain high acoustic impedance layers, such as evaporites and basalts.
(16) 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.
(17) As a parameter directly reflecting the petrophysical property of reservoir, the acoustic impedance can be used for predicting reservoir space distribution and storage conditions.
(18) The acoustic parameters include complex reflection and transmission coefficient (echo reduction and insertion loss), attenuation coefficient, complex acoustic impedance and sound speed.
(19) The product of the velocity and density of a rock is termed in the acoustic impedance.
(20) Constrained sparse spike inversion is conducted to predict the general distribution of reservoirs before GI, and the results including wavelet and 3D acoustic impedance(AI) can be used later.
(21) The proposed finite difference boundary condition expands the scope of application of FDTD to scattering problems of objects with a finite acoustic impedance but without tangential stress.
(22) A special nomograph designed for calculating the normal specific acoustic impedance is proposed.
(23) All children underwent routine otoscopic examinations of ear, nose and throat, and were also examined using the Madsen acoustic impedance audiometer.
(24) In this paper, the acoustic impact testing method has been presented with two different excitation methods: the tap testing method and the acoustic impedance testing method.
(25) It shows that the peak pressure, dominant frequency and energy of laser induced sound increase as specific acoustic impedance increases.