Two microphones, two devices, two different results
I have two mics--micW i436 on a new MacBook Pro M3 and i437L on iphone XR. They are both calibrated the same. When doing simultaneous measurements, the Sound meters give different answers, say 102 and 109 dB. However, the both give the exact same frequencies using FFT. The frequencies are always the same, though not the same for the vertical dB magnitude axis. All settings are the same for both tools in each device. Both tools are set for single impulses with same trigger. The tools are loaded in the multitool in both cases. Is this normal, fixable, or operator error? Also, the trigger units for FFT and oscilloscope ... are they Pa? Thank you in advance.