I have a pair of nioce canceling headphones and a pair of regular earbuds. Neither are apple brand and when I try to put them in the iPad they fit loosely and the sound still comes out of the external speaker. Do I need to buy a special adapter or special headphones. If so, do you have any suggestions for affordable ones. I saw some 2$ adapters online that say for 3.5mm to iPad. Would this be the correct one?