语音信号 yǔ yīn xìn hào

DEFINITIONS

  1. voice signal

CHARACTERS

语 yǔ
HSK 1
language, words; saying, expression
音 yīn
HSK 3
sound, tone, pitch, pronunciation
信 xìn
HSK 3
trust, believe; letter
号 hào
HSK 1
mark, sign; symbol; number