 NALNL2 is a second generation of prescription procedures from the National Acoustic Laboratories, NAL, for fitting wide dynamic range compression, WDRC, instruments that aims to make speech intelligible and overall loudness comfortable using a combination of a speech intelligibility model and a loudness model and an adaptive computer control optimization process. Adjustments have been made based on empirical data collected with NALNL1 and the main differences from NALNL1 are outlined in this paper. This article was authored by G. Keatser, H. R. Dillon, M. Flax, and others.