While we're wallowing around in calibration, I'd like to ask a stupid question.

The RS analog meter has ranges for 60, 70, 80 db, right? And on the meter itself, we see 0db as the midpoint, right? So, isn't a reading of 0 on the 70db scale, well, 70db? If so, why do we try to calibrate to 75 instead of 70 or 80?

bibere usque ad hilaritatem