Technology

about 12 decibels, which all but removes them, making them 94% quieter.

This "conversion" from decibel to per cent is more than ridiculous.

Just saying it doesn’t decrease the power is a bold claim without providing anything technical to support it.

I’ve read multiple articles and videos and yet this very crucial information is intentionally not included.

The claims are false, you can’t suppress or mute something with a tradeoff, unless they have somehow magically figured out physics anomalies. Would love to see some proof of this claim it doesn’t decrease power output.

"Electric leaf blowers are already far quieter than their gas-powered peers, but they still aren’t the kind of thing you’d like to hear first-thing on a Saturday morning. Looking to improve on the situation, a group of students from Johns Hopkins University have successfully designed a 3D printed add-on that manages to significantly reduce the noise generated by a modern electric leaf blower without compromising the amount of air it’s able to move."

First two sentences of the article.

I don't know mate, I wouldn't replace my electric tools–drills, grinders, saw... with gas ones. But these outdoors tools are a different kind of beast. I've only used an electric chainsaw and it was an absolute crap, maybe there are better ones but it was crappier than the smallest and shittiest gas chainsaws I've used, and a cord around you in that setting isn't great either.

The gardener in my last apartment replaced all of his powertools (mower, blower, trimmer, …) with electric ones powered by an accu-pack he carries on his back. This is an absolute game-changer! I could actually sit outside again and even do stuff for work, when he was there.

This thing influence how air moves through it, so it would make electrics more silent too

Pretty sure when I saw the original post talking about the design, they said the students were only working with electric leaf blowers. So this was designed to make electric leaf blowers even quieter.

To blow leaves.

So annoying twats can be annoying.

I get what you're saying, but leaf blowers are also commonly used for cleaning up extra grass clippings from the roads, etc.

Now pretend your electric blower is actually a super loud and inefficient two stroke motor.

The movement of air isn't noisy, the motor is.

I don't know, it sounds like it slightly redirects only the air at the margins that contacts the blower tube, which reduces turbulence. The noise reduction is due to the decreased turbulence, not a reduction in airflow. If I had to guess, the actual reduction in airflow is probably negligible, and they don't describe it in more detail because they're trying to commercialize it

They wont release anything because the design is being sold to black&decker, yay

There's a video at the bottom of the article. https://youtu.be/ISgHpUDeLBw