A self-learning grain sensing system for an agricultural harvester includes a first grain sensor having a first sensing surface responsive to first impacts of grain upon the first sensing surface, wherein the first grain sensor generates first electrical pulses in response to the first impacts； a second grain sensor having a second sensing surface responsive to second impacts of grain upon the second sensing surface, and wherein the second grain sensor generates second electrical pulses in response to the second impacts； and a control system configured to receive the first electrical pulses from the first grain sensor, derive control parameters from the first electrical pulses, and apply those control parameters to the second electrical pulses.
