I suspect the absolute pressure required to crush a hair would be measured in MPa, orders of magnitude more than the pressure difference from a sound level that

I suspect the absolute pressure required to crush a hair would be measured in MPa, orders of magnitude more than the pressure difference from a sound level that would kill you. The damage probably comes from the vibration ripping apart nerves cells at the base of the hair, but again that’s speculation on my part. So no vibration, no damage.