Does Lucas Cruikshank use his sped up voice on iCarly?

Lucas Cruikshank does not use his sped-up voice on iCarly. He plays the character of Freddie Benson, and his voice is his natural speaking voice.

The character of Freddie is known for his shy and geeky personality, but he doesn't use a sped-up voice.

Lucas Cruikshank is known for his character "Fred Figglehorn," which uses a sped-up voice, but that character is separate from his role on iCarly.