How to input 2 mic in laptop?

Hi,
I'd like to use Matlab to find sound direction, I plan to use 2 microphone at the beggining.but there's only one place to connect a microphone to the laptop.I try to use mic pre-amp ,it is a mic pre-amp for karaoke(MAYBE build in mixer) , it hasn't separated 2 mic, it come together. Is there a way to connect two microphones to one laptop
Thank!

[brucek]

Is there a way to connect two microphones to one laptop

Sure, you require a microphone mixer along with a set of microphones to plug into it............

brucek

I need to separate input to 2 channal. if use mixer ,Does it mix 2 input to 1?

[brucek]

Does it mix 2 input to 1

Yes........