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

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

but the general TONE
was soothing
The Big Bang Theory Season 5, Episode 6

It's not me. It's my new ring TONE.
The Big Bang Theory Season 3, Episode 14

Your TONE of voice,
your body language...
The Big Bang Theory Season 7, Episode 5