They are stereotypical nerds, and therefore have stereotypical nerd voices. Think Urkel or Professor Frink. Most people find the sound of their own recorded voice to be weird. In this case, the humor is that he actually has a weird voice. I think the humor in this one hit better 40 years ago. Also, a lot of Far Side humor isn’t haha funny, but more like, “Wut?”
They are stereotypical nerds, and therefore have stereotypical nerd voices. Think Urkel or Professor Frink. Most people find the sound of their own recorded voice to be weird. In this case, the humor is that he actually has a weird voice. I think the humor in this one hit better 40 years ago. Also, a lot of Far Side humor isn’t haha funny, but more like, “Wut?”