Estrange noise in my board. Can you help my?

sounds like u got fin hum....run yr finger along the trailing edges of yr fins and see iff theres a spot or spots not as sharp as others....when u find the blunter parts , get a fine file and slightly sharpen .....

Thanks.I will check my fins

Could be a hornet making a nest in there somewhere

Ahh the Whistling fins I had a coupe of boards that did that, hilarious, in this day and age of factory crap fins I'm surprised it still exists. What type of fins were they????

Eclipse ?
Pirate Agenda on swaylocks commented that plastic fins draw moisture which makes them flexi ??.....put them in an oven ,heat them and see how much stiffer they are.

Microwave them for 2 minutes . Al dente !