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| 单词 | impedance-matching |
| 释义 | > as lemmasimpedance-matching impedance-matching n. the adjustment of impedances in such a way as to minimize the power reflected or the reduction in the power transferred that occurs when an oscillatory current or other wave meets a change in impedance; also attributive. ΘΚΠ the world > matter > physics > science of sound > sound-waves > [noun] > impedance > adjustment of impedance-matching1929 1929 E. Mallett Telegr. & Telephony vii. 160 Impedance matching is necessary in order that the maximum available power may be absorbed where it is required. 1934 Jrnl. Inst. Electr. Engineers 75 803/2 Impedance-matching transformers have to be used at both ends of the screened lead-in feeder. 1968 Listener 22 Feb. 235/3 The bony levers [of the middle ear] reduce the amplitude of vibration and so serve as what an engineer would call an ‘impedance-matching transformer’. This gives efficient transfer of energy from the air to the denser fluid in the cochlea of the inner ear. < as lemmas |
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