# Convert A weighted voltage output into sound pressure

I have designed an A weighting network circuit. but i cant understand how to convert it's voltage output in to corresponding sound pressure level in dB. So How can I convert these voltage readings into dB?

• Perhaps with a logarithmic amplifier. Aug 31, 2014 at 10:36
• OP, please wait before accepting an answer, I feel mine can be expanded quite a lot and there are probably people who will be able to provide a better insight. Aug 31, 2014 at 10:53

You can also search for a parameter called "sensitivity", the manufacturer of your loudspeakers should be able to tell you it. Sensitivity is measured in $\frac{\text{dB}}{\text{W}\cdot\text{m}}$, i.e. is the spl in decibel the loudspeaker outputs for each watt of power you give to it, measured at a distance of 1m. Problem is that sensitivity depends on frequency and on the enclosing and probably other parameters.