音障

yīnzhàng

sound barrier; sonic barrier

Wiktionary

Entry Composition

1 音 yīn
  1. sound
  2. noise
  3. note (of musical scale)
  4. tone
  5. news
  6. syllable
  7. reading (phonetic value of a character)
2 障 zhàng
  1. to block
  2. to hinder
  3. to obstruct