Audio problem: In the beginning of the episode, Clark leaves for the Talon to meet with Pete. He is offered a ride by his mother, but says he'll run there instead. As he closes the door behind him, we hear the sound of him taking off in super-speed, but we can still see him through the glass in the door moving down the stairs in normal speed.
Audio problem: After Perry explains that the information he has on Lionel is with "multiple attorneys with 'in the event of my death' instructions" Perry tells Lex that the information is "all yours". As he says "all yours" the camera is behind and you can see Perry's mouth say "I just want one thing." but you don't hear Perry actually speak the line until the camera has switched and is facing Perry.
Audio problem: While Clark says "next time I could hurt you or mom." the camera is behind him. As he says "you or mom" his head is turned so that you can see his lips do not match the words being said.
Answer: No, there is no such character in the comics. He's a "meteor-freak" like all the other baddies on the show. The sound has something to do with him vibrating his vocal cords very fast to create a high-pitched squeal.