I think in DW there is only one "noise" value, no discrimination for NB and BB so you can't model different BB and NB noise levels. That would be great if it was possible, for example most modern boats would be detectable by broadband when fast, but you would have hard task trying to identify it by discrete frequencies...
In platform noise levels and noise profiles, I tried to implement our knowledge about real-world dependencies, so in our mod the Akula II is quieter than 688I at very low speeds, and more noisy than 688I at high speeds. (and the Seawolf at 20kts have noise level equal to stopped 688 what was claimed
)