Bubble curtains can be deployed to reduce or mitigate impacts from high noise levels produced by pile-driving. Air streaming from closely spaced release points creates a “wall” of bubbles around the pile. Because air and water have a substantial impedance mismatch, the bubble curtain acts as a reflector. The bubbles also resonate in response to sound and absorb sound energy. Up to a 30 dB reduction in sound has been measured when bubble curtains are deployed with pile driving.