百度试题 结果1 题目 The greater the acoustic impedance of the material, the greater the attenuation of the ultrasonic propagation.( ) 相关知识点: 试题来源: 解析 错误 反馈 收藏
The invention relates to a method for measuring the acoustic impedance of a liquid (2), especially for determining the density of a liquid (2). According to the invention, an ultrasonic transducer (1) is introduced into the liquid (2), at least one resonance frequency of the ultrasonic ...
声阻抗最大的是()Which tissue has the highest acoustic impedance?A.颅骨skullB.肺lungC.肌肉muscleD.
Characteristic acoustic impedance is the ratio of effective sound pressure at a point to the particle velocity at that point in a free, progressive wave. This ratio is equal to the product of the density of the medium times the speed of sound in the medium. The characteristic impedance of a...
3.(General Physics) Also called:acoustic impedancethe ratio of the sound pressure in a medium to the rate of alternating flow of the medium through a specified surface due to the sound wave. Symbol:Za 4.(General Physics) Also called:mechanical impedancethe ratio of the mechanical force, actin...
The effects of absorption loss in the medium is neglected as the intention is to study the effect of scattering alone. The pulse-echo response is demodulated to get the in-phase quadrature (IQ) signal. The power of the IQ signal is used as a measure of the cumulative backscatter intensity...
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