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科学素养与生活应用·英语30篇(9)

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How Noise-Canceling Headphones Silence Busy Sounds

How Noise-Canceling Headphones Silence Busy Sounds

降噪耳机如何消除嘈杂环境音

  1. Microphones on headphones hear outside noise before your ears do.
  2. A chip creates opposite sound waves to cancel loud sounds.
  3. This works best for steady noises like airplane engines.
  4. It does not block voices or music—you still hear clearly.
  5. Batteries power the quick math that makes silence possible.
  6. Ear cushions add physical blocking for higher frequencies.
  7. You focus better with less background stress.
  8. Science turns noise into quiet, one wave at a time.
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