This is sort of a cross between a computer science and Physics question, but I would be grateful if anyone here could help me.
My objective is to calculate the sound pressure level (in dB) of a sound generated 1 meter away. I don't have a SPL meter, nor do I have the money to buy one, so I would like to use my condenser microphone to calculate this. The microphone I have is the Blue Yeti, which has a sensitivity of 4.5mV/Pa (reference value 20 microPascal).
So my question is is there a way that the digital output of the microphone can be directly monitored and recorded in units of Volts. Hence, I would use these values to calculate Pascals and then dB. Can anyone point me to a (preferably free) program that can do this?
Also please feel free to comment on my experimental method. Is my reasoning in calculating the SPA sound when it comes to this?