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Tony's voice was flat, but his hands were putting the steering wheel in a choke hold.
When the pulse-generator sends an ultrasonic pulse to the wireless electrode, the sonic energy causes a receiver in the electrode to vibrate.

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Open the tool →音波 (yīn bō) means “Sound wave”.
音波 is pronounced yīn bō in Mandarin Chinese.
“Sound wave.” is 音波 (yīn bō) in Chinese.
This page has 2 example sentences using 音波, each with pinyin and an English translation.