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Strange Noise Cancellation Device
  • Xin Zhang and Ghaffarivardavagh were enticed by an alluring question: “Can we design a structure that can block noise but preserve air passage?”

    Leaning on their mathematical prowess and the technology of 3D printing, it turns out they can. In a January 2019 Physical Review paper, the researchers argue that it’s quite possible to silence noise using an open, ringlike structure, created to mathematically perfect specifications, for cutting out sounds while maintaining airflow.

    https://www.bu.edu/research/articles/researchers-develop-acoustic-metamaterial-noise-cancellation-device/

    Looks like total bullshit.

  • 2 Replies sorted by
  • ...looks like total bullshit... my gosh, you made my day!

  • In the video it sounds like they are using a sine wave, which is a single frequency and is technically not noise. I would like to hear this material work with a real noise source, like a pink noise signal or even some normal sounds.