OKCRadioGuy suggested:
The only way to eliminate the "[wall of skywave] mush" (an aptly descriptive phrase which you invented in the Engineering topic) that is about to be unleashed on the AM broadcast band is to eliminate IBOC broadcasting on AM radio stations. Entirely.
have any of the eggheads considered running LESS power on more powerful AM stations' "HD" signals? Here's a thought.. IF stations over 5k made their HD signal only at the level of a 5k at night, wouldn't that do a LOT to help minimize the nighttime skywave interference problems caused by "HD"? The analog could blow out enough goo as usual to get long-range coverage while the station could keep HD going for the local market at night that way. I think it would be a pretty cool comprimise! (not perfect but much better than just "go ahead boys and let the mush fly!")
The only way to eliminate the "[wall of skywave] mush" (an aptly descriptive phrase which you invented in the Engineering topic) that is about to be unleashed on the AM broadcast band is to eliminate IBOC broadcasting on AM radio stations. Entirely.