#bubblecurtain — Public Fediverse posts

#EnergyTransition: How bubble curtains protect #porpoises from wind farm noise https://www.bbc.com/future/article/20231106-the-big-bubble-curtains-protecting-porpoises-from-wind-farm-noise

"As huge offshore #WindFarms spread across Europe's seas, efforts grow to buffer the impact on #wildlife... The #BubbleCurtain was designed around the #porpoise's specific needs and traits, lowering #WindFarm construction noise to a threshold deemed safe for the species, based on scientific research. Its proven muffling effect may also benefit other marine #mammals such as #seals"

"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 #BubbleCurtain 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."

https://dosits.org/galleries/audio-gallery/anthropogenic-sounds/bubble-curtain/

A double bubble curtain is even more effective

https://maritime-executive.com/article/vineyard-wind-tries-bubble-curtain-system-to-cut-pile-driving-noise

"At some #OffshoreWind farm construction sites, loud pile drivers are used to anchor turbine bases to the ocean floor.
But underwater noise and vibration can disturb #whales and other marine mammals swimming nearby.

One strategy is called a #BubbleCurtain. A ship lays a tube on the ocean floor surrounding the construction site. Air is then pushed through holes in the tube to create a vertical wall of bubbles that traps the sound of construction."

https://yaleclimateconnections.org/2023/10/bubble-curtains-help-protect-whales-from-the-noise-of-offshore-wind-construction/

Keeping the Noise Down Under the Sea - Since sound is the primary sense used by most ocean life, disruptions to the natur... - https://hackaday.com/2023/05/23/keeping-the-noise-down-under-the-sea/ #marinepropulsion #noisepollution #bubblecurtain #offshorewind #greenhacks #propeller #offshore #plankton #undersea #science #marine #subsea #whales #ocean