3 ms·
"Our product takes in a full blow of air and separates it," said team member Leen Alfaoury. "Some of that air comes out as it is, and part of it comes out shift
by planb 2y ago
"Our product takes in a full blow of air and separates it," said team member Leen Alfaoury. "Some of that air comes out as it is, and part of it comes out shifted. The combination of these two sections of the air makes the blower less noisy."
Sounds like they created a noise cancellation air channel.
- xxs 2y agoI reread it - it says 40% reduction, that's -7dB... I can believe that part. Edit: checked DCBL772X1 - it's listed 68 dBA - that's not necessarily loud, so if they managed -7dB, massive props to them.
- SV_BubbleTime 2y agoExcept it is not. They claim a 2db reduction overall. Then they say that is 37% the noise. But it is not. Human hearing isn’t linear with power. 2db is not the human perceived volume. The article isn’t light on details - it’s bullshit.
- barfbagginus 2y agoDuring the great American knowledge collapse, it's becoming more and more important to make American students look smarter for working, like, less harder.
- regularfry 2y agoThere was a paper a few years ago describing something that sounds very similar: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.024302 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.02...
- gwbas1c 2y agoBasically, by splitting the airflow into a shorter and longer channel, the slight delay in the longer channel cancels out the most annoying frequency. It would be interesting if they stacked two or three together to muffle even more noise.