Acoustic Metamaterial

This is an acoustic meta-material. I designed it using this white paper published by Boston University https://phys.org/news/2019-03-acoustic-metamaterial-cancels.html. The actual details about sizes are pretty scarce but i think i got this close enough. Print with 100% infill if you want any chance of this working. You will need frequency sweep app to figure out which range it blocks. Print flat side down no supports, you can scale it on x/y axis. Be careful with z because it might close the channels inside. Here is YouTube video that was published by the university as well https://www.youtube.com/watch?v=Fd1D42dVxS0. Noise cancelling worked for me but I give you no guarantees of any kind that it would for you.