I have got MATLAB version 2011 with (DSP,Image processing & signal processing toolbox). I want to create an interface between an external microphone and MATLAB such that I must be able to get the output voltage readings from mic in MATLAB in realtim

I have got MATLAB version 2011 with (DSP,Image processing & signal processing toolbox). I want to create an interface between an external microphone and MATLAB such that I must be able to get the output voltage readings from mic in MATLAB in realtime. At the output side I require these: Output readings of mic in voltage(v) Conversion of the respective voltage(v) value into pressure (pascal). Any help is richly appreciated. Also if any more clarification is required in this plz ask.

Thanks Priyanka