I pulled the TL numbers from the paper and came up with an STC rating of around 31dB for the 20mm hole model. That is roughly the same STC rating as a decent dual pane window.
This reminds me of that Sono device, which seems more convenient.<p><a href="http://www.youtube.com/watch?v=Mv6sBuwzLhk" rel="nofollow">http://www.youtube.com/watch?v=Mv6sBuwzLhk</a>
<a href="http://venturebeat.com/2013/11/06/sono-window-noise-cleaner-tunes-out-annoying-city-sounds-tunes-in-good-ones/" rel="nofollow">http://venturebeat.com/2013/11/06/sono-window-noise-cleaner-...</a><p>Haven't read up on whether it works as advertised. Anyone have insight?
This is innovative, but sure to be cost-prohibitive. I hope they can find a way to may it something that is more than a conversation starter for the rich because it is really cool.
What I like about a good window is its ability to let in light without also letting in the air, as I've observed that outside air tends to be rather colder (or hotter) than my preference.<p>Cool science, though. If they can build these cheaply and preferably thin, it might be good for inside the house. Or in the paper-thin apartment walls, and maybe along with some much-needed thermal insulation while they are in the wall anyway.