This is partly why the issue of "impedance mismatch" appears so important to a lot of OO people.

这就是为何“阻抗失谐”问题对于许多OO人员来说显得如此重要的部分原因。

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Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.

轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。

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If using a bioelectrical impedance scale, be sure to measure under the same circumstances each time. Hydration, food intake and skin temperature can affect body fat measurements.

如果是使用生物阻抗电子秤，确认每次是在同样的条件下。水和作用，吸入的食物和皮肤温度能过影响体脂的测量。

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Power lines are extremely hostile places for data signals, with high levels of electronic noise and an obstacle course of transformers, surge arrestors and splices that create a huge impedance to the free flow of high-frequency signals.

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To explore this, I switched to using Beyerdynamic DT 990 Pro over-ears with a high impedance of 250 ohms and found that the difference was obvious: the iPhone 4 and 4S were the only devices to provide sufficient volume in quiet recordings using these headphones.

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Innovamedica is also co-developing with Tyco Healthcare, a unit of conglomerate Tyco International, a device called a gastric mucosa impedance spectrometer, used to monitor patients in the intensive care unit for signs of organ failure after surgery.

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