
(SHELDON HUMS TONE)
The Big Bang Theory Season 2, Episode 9

(IMITATES RAJ'S TONE) And talking
like this doesn't make it less creepy.
The Big Bang Theory Season 10, Episode 11

Well, anything can sound silly
when you put it in that TONE.
The Big Bang Theory Season 10, Episode 5

Great. Just keep in mind astronauts lose
a lot of muscle TONE in space...
The Big Bang Theory Season 6, Episode 4