| 单词 | crystal microphone |
| 释义 | crystal microphone (once / 5909656 pages) n WORD FAMILY crystal microphone USAGE EXAMPLESHe adopted the same method of modulation using a record player amplifier and an Astatic crystal microphone. Joly, Norman F., The Dawn of Amateur Radio in the U....(2010) n a microphone in which sound waves vibrate a piezoelectric crystal that generates a varying voltage Hyper microphone, mike device for converting sound waves into electrical energy |
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