At Johns Hopkins University, a Mechanical Engineering class was given a difficult assignment: To silence an off-the-shelf leaf blower, without reducing its efficacy. Apparently the assignment was given with no expectation that it could actually be accomplished; as the school's Hub publication writes, "Shocking their sponsors, their advisers, and even themselves a little, the students did it." Seniors Leean Alfaoury, Michael Chacon, Madison Morrison and Andrew Palacio have been working...
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