[ClearCase_guy]

the noise in the cabin was “loud enough to damage your hearing,”

And they reached 15,000 feet without noticing?

[Semper Vigilantis]

There were no “abnormal indications” in the cockpit and that cabin remained pressurized “normally,”

Huh? That must be one heck of a pressurization system. Maybe they meant the cockpit pressurized normally?