I hope this invention catches on.
Jill Rosen / Published May 14
MEDIA INQUIRIES
The challenge before Johns Hopkins University engineering students: Take a leaf blower, but make it quiet. Make it work as powerfully as ever, but do not allow it to emit the ear-piercing caterwaul that has gotten leaf blowers banned in some communities and cursed in many others.
Shocking their sponsors, their advisers, and even themselves a little, the students did it.
Their improved leaf blower drops the overall noise level by nearly 40% while almost entirely erasing the most obnoxious frequencies. The design is patent-pending and Stanley Black & Decker expects to be selling them in two years.
From: The Hub
