Dear Am 08.03.19 um 23:17 schrieb David W. Jones:
Thanks, I was visualizing it as a sheet of material you could just hang like a curtain. I think the damping frequency can be changed for different versions of the material?
Yes you could, and you could could put several on a tube. However, this device is explicitly build to be open in the sense that air can flow through it. For a curtain like device you can build standard meta-materials, see e.g. wikipedia for an explanation. While meta-materials are typically build for electro-magnetic waves, the principle does work for sound waves. The main problem is, you need sub wave-length structures where the total size is than a few wave lengths, which makes it unfeasible for low frequencies in a studio, as the curtain needs a 'considerable' thickness. Nevertheless you could build band gap material blocking sound in a frequency range, much larger than that of the ring, which is a special purpose device. A more typical feature would be blocking the EM wave with the frequency of a few GHz, block the Wifi and the let the light through. And the most funny application is the invisibility-cloak with which you can hide things so small you wouldn't be able to see without the invisibility cloak. But but works, just too expensive to build on a macroscopic scale. Best regards, Peter _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
