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1·Seismic acoustic impedance linear inversion algorithm is studied.

研究地震波阻抗线性反演求解方法。

2·Methods to check on objective acoustic impedance and subjective pure tone audiometry.

方法对外伤性聋进行客观声导抗测试和主观纯音测试。

3·A special nomograph designed for calculating the normal specific acoustic impedance is proposed.

本文提出一种为计算法向声阻抗率而设计的专用列线图。

4·Up till now, there is no accurate standard for the optimum acoustic impedance of the coupling medium.

目前国内超声医学界对最佳耦合剂声阻数值的选择尚无较为准确的说法。

5·In acoustics, the product of velocity times density, also called acoustic impedance and symbolized by z.

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。

6·Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.

当反射界面上下两侧的声波组抗降低时，反射系数就会出现负值。

7·Seismic wavelet extraction and stratum acoustic impedance inversion are very important in seismic inversion.

地震子波的提取和地层波阻抗反演是地震反演中非常重要的两个方面。

8·Based on 1-d wave equation, a reconstruction algorithm of layered acoustic impedance profile has been established in this paper.

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。

9·Acoustic impedance changes and hearing threshold shifts after exposure to impulse noise or air-blasts were studied in guinea pigs.

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。

10·In this paper, the nonlinear acoustic impedance of the micro-perforated panel is investigated both theoretically and experimentally.

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。