When I first got my hedgehog, Wabisabi, I took him over to let my father see him. She was 8 weeks then. Suddenly my father said, she's chirping. she was and does. She also squeaks, huffs sometimes like a steam train, chugs, almost purrs, makes eee sounds. I called the breeder. She told me it ran in the family. Her father and aunt makes lots of different kinds of noises also.
Her half brother who my so owns (same father) makes fewer noises but also chirps.
Despite being half siblings, they are entirely different in personality. He is calm, cuddly, very easy.
She is a wild child and I adore her.