"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.

Basically, 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.

I 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.

Except 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.

During the great American knowledge collapse, it's becoming more and more important to make American students look smarter for working, like, less harder.

There was a paper a few years ago describing something that sounds very similar: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.02...

I might be going deaf and losing high-pitched frequencies, but I couldn't tell much of a difference in the video example of before/after.

Because it’s 2db overall.

No camera is going to pick that up because no human is going to hear it.

They claim 37% reduction, but that isn’t true for human perceived volume.

And as has already been pointed out elsewhere, even if it was an actual 37% reduction it would be useless anyway since no commercial operation would be viable with electric leaf blowers. They’re good for blowing the leaves out of a homeowners driveway and not much else

Honestly, my EGO “670cfm” on turbo is really quite good. But yes, I use it for maple leaves.