I had a task to make a calibration file for another microphone. I measured the speaker with both microphones from the same position in space. Then he divided A into B and B into A. Looked at the tab all SPL how they look. The original graphs differ by about 9.6 dB. Therefore, the results of division are spaced relative to zero. Before smoothing, they are almost mirror image, but differ slightly in amplitude, up to 0.3 dB. After smoothing, they are not mirrored either in amplitude or in shape. Up to 200 Hz they are slightly different in amplitude, after 200 Hz they are very different.
1. Should they be mirrored with respect to zero?
2. What is the correct way to get a graph of the difference between two microphones to create a calibration file?
1. Should they be mirrored with respect to zero?
2. What is the correct way to get a graph of the difference between two microphones to create a calibration file?