Thank you for all the work you put into this. It will be very helpful to many members.
I downloaded the .txt file of your data. In your notes, d) states: "3dB is equal to twice the loudness..."
Actually, 3db is a barely noticeable increase in volume. Where you may have gotten confused is that with audio equipment, +3 db represents a doubling of amplifier _power_.
Anyway, thanks again!