That is why it hurts my ears...

Talking about laryngeal tissue, imagine this...

My 2 year old when she is upset, will screetch. Well, it hurts my ears. Anyway, the otherday I pulled out my laptop and the real time spectrogram to entertain her. So, she was jabbering and making lots of pretty spectrograms. Well, she screetched and I quickly saved it. Attached is the picture. She hit nearly 2500 Hz for a fundamental frequency. Amazing... That is why it hurts my ears.

So how high in pitch can a person phonate? At least 2500 Hz if done right (and very young as well).