As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT INTO CRW APPROX. FL220, CREW STATED HEARING LOUD AIR NOISE FROM THE CABIN AREA. FLIGHT ATTENDANT ALSO REPORTED NOISE TO FLIGHT CREW. CREW PERFORMED EMERGENCY DECENT AND MANUALLY DEPLOYED CABIN O2 MASKS. CABIN ALTITUDE NEVER EXCEEDED 6000FT. EMERGENCY DECLARED. FLIGHT LANDED WITHOUT FURTHER ISSUES.