I have 2 signals recorded at 2 different locations along a beam. I excite one end of the beam, and measure the signals at 2 different points.
Within the system I have pre-amp and post-amp gain on both sensors. However, the 2 sensors have different levels of fixed gain - i.e. if sensor 2 does not hear the impulse then I turn up the gain at sensor 2 using the pre- or post-amplifier (sometimes both). Therefore, I have 2 sensors with 2 different levels of gains.
I want to compare the 2 sensors, e.g. measure amplitude change along the beam by comparing the 2 signals. Due to the difference in gain, sometimes sensor 2 has a high amplitude than sensor 1. Therefor calculating difference in gain is not possible.
Is there any way of 'reducing' sensor 2 so that is has the same gain as sensor 1? So I can compare like for like.
I am doing the processing in MATLAB.