camelot-forum.co.uk

This sounds interesting (pun!) Bubble curtains to reduce the noise impact of offshore wind turbine foundation installations

https://renews.biz/85711/vineyard-wind- ... e-curtain/

Here’s my take. The article mentions a secondary curtain of bubbles just once and nothing else, as though bubbles are new. I can remember posting about bubble curtains at least five years ago for protecting cretaceans during the monopile driving.

Stan wrote: ↑Mon May 15, 2023 4:47 pm Here’s my take. The article mentions a secondary curtain of bubbles just once and nothing else, as though bubbles are new. I can remember posting about bubble curtains at least five years ago for protecting cretaceans during the monopile driving.

Crustaceans or cetaceans?
Good idea, whales etc would benefit if the percussive noise from piling was absorbed by the air bubbles rather than being transmitted through "solid" water. Don't know whether crabs and lobsters would benefit... Cretaceous life forms have been dead rather too long to be worried by it!
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AE-NMidlands wrote: ↑Wed May 17, 2023 12:57 pm

Stan wrote: ↑Mon May 15, 2023 4:47 pm Here’s my take. The article mentions a secondary curtain of bubbles just once and nothing else, as though bubbles are new. I can remember posting about bubble curtains at least five years ago for protecting cretaceans during the monopile driving.

Crustaceans or cetaceans?
Good idea, whales etc would benefit if the percussive noise from piling was absorbed by the air bubbles rather than being transmitted through "solid" water. Don't know whether crabs and lobsters would benefit... Cretaceous life forms have been dead rather too long to be worried by it!
A

Are you sure about that, at least half the politicians must fall under that classification.
Oh sorry that should be cretinous!

On second thoughts, I wonder whether the bubble curtain is a cheap fig-leaf?

Structure-borne sound is a real curse - even the BBC got caught out by hammer-drilling noise invading the "Today" radio studio a few years ago, and they should be the best experts on sound-proofing a studio! I wonder whether the shock/sound waves from piling would propagate through the seabed no matter what you did and drive ocean noise by contact with the water outside the curtain?

(I think in one of the "Smiley" books le Carre describes a bugging-proof meeting room which is suspended within a building so that nothing at all can transmit any sound to the outside. Presumably the wires it hung from were on springs/shock absorbers too.)
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