The Microphone circuit went through three stages:

The Clapper

An Enveloped Clapper

High Gain Mic

Here is the flow diagram for calculating the alert amount from the audio input thus far:

And here is the code written for the microcontroller:

/***************************************************************************/
// interpret micData function
/***************************************************************************/


void interpretMicData( UINT8 micIn) {
  
  if(micIn >= 196) { //assumming a scream is in a relative amplitude of 200 or greater in the range: 0 - 255
    
      micDanger++; //increment spam-like protection
              
       if(micDanger == 255) {  //wait until the spam protection has reached the limit of 255
       
          micAlert = 1;        //set high-level alert flag
       
         }       
       else {
          return;
         }
     } 
  else  
  {
     micDanger = 0;      //reset micDanger count
    
  }  
  return;    
}

If you have any microphone hardware questions, ask honcho. Ask jazzman about microphone software details.