Currently Being ModeratedFeb 11, 2013 9:40 AM (in response to ground1312)
Short answer: You don't.
Earphones without the microphone are included with the latest iPod touch (5th generation) and nano (7th generation). You would either need to buy one of these products, or find someone else who did and is willing to sell their earphones, maybe on eBay. Considering the inconvenience of this, why don't you just get a pair with a microphone?