[ApK]

Funny. "Hat boy...."

I will change my wake word to Echo and play that recording for her tonight.

I distinctly heard utterances ending in a "Oh" sound in at least two of those recordings, which I can sort of see might have been reasonable to detect as "Echo."

For the burst of noise, no idea, except maybe that's the A.I.'s native language, and the one they use when they don't want humans overhearing their plans.