HF (Zeeko alu) whistling noise/vibration - shark reactions?

[omg]

Just a tought what sharks might think about the pretty loud whistling noise and the vibration of the mast? Would it attract them or what? What's your take on it?

[longwhitecloud]

there is no doubt that sharks chase foils without the vibration

[jespin4845]

i get three reactions from sharks,

-they hear me coming and dart away, the majority i would say
-ive only had two chase me for a second that I've seen, i think they saw the foil and assumed it was a fish, even then they only chased me for a 1/2 a sec and veered off
-they ignore me completely, and I've even hit two actually, they were probably just as freaked as i was, like those that chase me extreme minority

they hear my carbon foil which i don't really here and my aluminum zeeko foil, which sings

and when i board slap on the water they really mostly dart away also

[coleman]

my foil was singing and it was my rear wing that need a bit of sanding down of the trailing edge to make it sharper. fixed the prob

[max]

My zeeko alloy does not whistle at this stage. It has on very odd occasions stars off with a hum just after it lifts but disappears once a little bit more forward speed.

Maybe I am lucky for now.

A friend has a full carbon foil ( not zeeko) and it is like a whistling duck and yet two others who have the same brand foil have no noise from their foils at all.