dBu     mV/Pa
  = mV/Pa   = dBu
               
                      Max Voltage at Preamp  
    Microphone Max SPL     dB SPL
    Microphone Sensitivity   mV/Pa
          = dBu
                      Microphone Output Noise  
    Microphone ENL     dB-A
    Microphone Sensitivity   dBu
          = dBu