Engineering students at Johns Hopkins have created a silencer module for the campus leaf blowers, reducing the overall noise pollution of the devices by 37%, while they succeeded in almost completely removing the high-pitched whining that annoyed them the most. The design is patent-pending and Stanley Black & Decker, who sponsored the students, expects to […] The post Students Invent Leaf Blower Silencer Attachment–Corporation Expects to Be Selling Them Soon appeared first on Good News Network.