I think the issues that I've dealt with occur because many factors change as the level changes. Generally, just whispering into a condensor sounds fine. An all out scream will get the room into the mic more profoundly. An even bigger problem is that some voices change in character in extreme amounts as they begin to wail. I noticed this recently as a rock singer's voice sounded nice and full during the verses. When he got the choruses, it was night and day. Of course it was about 400 dB louder so it sounded bigger. However, in mixing, when I rode the volume to even it out quite a bit, the choruses ended up sounding weak and very thin. All the low end from his voice was gone. I mean everything under 1000 Hz was gone...damn near. It sounded more like a telephone than a AKG 414.
I'm not sure if should tell a singer to back off a little bit (which may or many not kill the energy of the tune) or simply adapt my technique around his.
As was posted previously, a distant mic with a gate could work. Of course, this doesn't solve the thin problem which comes from the source (his vocal chords). Generally, a scream should sound thin and seldom sounds "full" by nature. However, this dude was still singing.
Hell, I don't know what I'm talking about. The bottom line is the choruses sounded like a telephone and the versus sounded fine. What the hell is the solution?
Brandon