It was quiet. Maybe too quiet. With advocates for pedestrians and the blind warning that hybrid and electric cars could catch walkers unaware, the designers of the Nissan Leaf have added sound effects ...

Noise barriers made from trees and other plants can provide a respite from unwanted noise pollution. When strategically placed by a roadway, in a backyard, or in a park, trees help reduce pesky noises ...

Leaf-nosed bats can locate even small prey with echolocation by exploiting an "acoustic mirror" effect, according to a recent paper in Current Biology. If the bat approaches an insect on a leaf from ...