'elp me if ye can

Hey guys ive got an alright laptop that ive had no issues with thusfar until my krks arrived today, i plug em in, just into the headphone jack for the now, might get a soundblaster doodle at a later date, but anyway, plug em in and i can hear an awful sound, it differs when i move the mouse, and press buttons, really bad, like i can hear everything going on in the laptop.

then i unplug my power cord from my laptop and the sound is completely gone, beautiful clarity, so, my question, how do i keep the power cord in, and have the same sound?