I recently found out that I have exploding head syndrome (EHS).
While I've had exploding head syndrome all my life, I didn't know what it was called until yesterday, when it was briefly discussed in a podcast I listened to.
From Wikipedia:
— Read the restExploding head syndrome (EHS) is an abnormal sensory perception during sleep in which a person experiences unreal noises that are loud and of short duration when falling asleep or waking up.