Seismic measurements of travel time and amplitude define the subsurface geometry and give estimates of the acousticimpedances 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。
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The acousticimpedances and thicknesses of the acoustic decoupling layers determine the acoustic impedance of the acoustic decoupler, and, hence, the pass bandwidth of the DSBAR device.