Has the FAA given any indication on what the decibel threshold might be to potentially reverse the overland ban on supersonics? You had mentioned in another com

Has the FAA given any indication on what the decibel threshold might be to potentially reverse the overland ban on supersonics? You had mentioned in another comment that the tipping point might be the feasibility and eventual popularity from going LAX/SFO - Tokyo but that in and of itself may not be enough satisfy residents and other groups.