Songbird gets the same treatment as Banshee during their trip to StLouis (I'll post the scans into Emma respect thread)... Emma is used to work with people with sonic powers.
The one who's real threat to her there is Penance (he supposingly has power canceling ability) and-maybe- Venom (but no bullshit about Venom's great TP powers- he's goood at posession and resistance and that's all)...