ddj t1 headphone noise

hy everybody. here is my problem : i have 2 laptops one fujitzu siemens and one Macboook pro i5. one the fujitzu the headhones work well but on the mac when i press the cue button i have a noise like a " pam pam pam" that goes on the beat..  it's sounds exacly like when you beat whith the finger on the headphone...it;s really anoing and i don't know what is the problem.. :( thank you!