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  "path": "/news/2026-04-rotating-acoustic-filter-isolates-machine.html",
  "publishedAt": "2026-04-20T12:20:06.000Z",
  "site": "https://techxplore.com",
  "tags": [
    "Engineering"
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  "textContent": "Seoul National University College of Engineering announced that a research team led by Prof. Sung-Hoon Ahn of the Department of Mechanical Engineering has developed, for the first time in the world, an \"interference acoustic band-pass filter\" capable of selectively filtering and amplifying specific frequencies without the use of electronic circuits.",
  "title": "Rotating acoustic filter isolates machine fault sounds in 100 dB noise"
}