Comments on Profile Post by SoupRKnowva

  1. SoupRKnowva
  2. Lyander
    Lyander
    So basically sonic vantablack? Hell yes. Hopefully not as exorbitantly priced or as iffy with licensure.
    Mar 12, 2019
    monacelli likes this.
  3. Kunlun
    Kunlun
    Vantablock
    Mar 12, 2019
    DigMe, Priidik, Ash1412 and 3 others like this.
  4. monacelli
    monacelli
    @Lyer25, That's what I thought of too. I think this would be like the opposite of vantablack actually (vantawhite? There's a wheel of fortune joke in there somewhere). Vantablack absorbs essentially all visible light, whereas this acoustic material seems to reflect all audible frequencies (kind of like white objects reflect visible light).
    Mar 12, 2019
    Lyander and Jinxy245 like this.
  5. Cspirou
    Cspirou
    Not vantablack. More like a mirror
    Mar 12, 2019
    Syzygy and SoupRKnowva like this.
  6. Cspirou
    Cspirou
    Mar 12, 2019
    Ash1412, Lyander and SoupRKnowva like this.
  7. Lyander
    Lyander
    Haha, didn't notice SoupRKnowva'd posted the link before my comment. Looks really cool! Curious to see how people manage to use this for hobbyist applications.

    Also SciHub ftw.
    Mar 12, 2019
    monacelli likes this.
  8. Priidik
    Priidik
    It's likely a quarter wavelength resonant tube that due to the fancy muffler might work on several frequencies. Doubtful that it will 'block' broadband sound.
    Mar 12, 2019
    Lyander and monacelli like this.
  9. Hrodulf
    Hrodulf
    It's pretty narrow band. Would be interesting to use one in a port so it doesn't leak out mids.
    Mar 13, 2019
    Syzygy likes this.
  10. Cspirou
    Cspirou
    Yep, below a certain frequency it's nearly all transmitted. At a certain frequency there is attenuation of 32dB and past that it's 2dB. The innovation is that it is much smaller then the usual acoustic cavitiy and the structure is very open.

    It can be tuned to certain frequencies so you can probably make several and stack them to increase the frequency band.
    Mar 13, 2019
  11. Cspirou
    Cspirou
    Optical equivalent would be a mirror that reflected one color and let everything else through
    Mar 13, 2019
  12. Priidik
    Priidik
    @Cspirou Or quarter wave Bragg reflector.
    Mar 13, 2019
    Cspirou likes this.
  13. westermac
    westermac
    Let me know when they make one with straps so I can put it over my kid's mouth
    Mar 13, 2019
    Syzygy and SoupRKnowva like this.
  14. Cspirou
    Cspirou
    Doesn't look super complicated to reproduce based on the paper.
    Mar 13, 2019
  15. Syzygy
    Syzygy
    More interested in something for open cans that keeps the soundstage & air, but would block the music from disturbing coworkers. And absorbs or greatly attenuates vs. reflecting.

    But this could certainly be used for subwoofer tuning.
    Mar 13, 2019
  16. Cspirou
    Cspirou
    Seems like this would be good for fan noise since it's still open for ventilation.
    Mar 13, 2019