Audio problem: Near the end, when Clark is surprised by the woman coming to say good bye, as he is working on the tractor the distinct sound effect heard is that of a ratchet wrench, but what he puts down is a normal wrench, not a ratchet wrench.
Audio problem: When Clark and Manhunter are in his Barn talking about how to stop Bizarro and figuring out the yellow sun can heal Clark, there is a beep of a watch or someting similar in the background, but neither Clark nor the Manhunter react to it, which means it happened off screen and unintentionally.
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.