A deaf-mute can't scream.
4 seconds sound clip from the The Tingler (1959) movie soundboard.
You can hear this line at 00:42:16 in the Blu-ray version of the movie.
Quote context
[...]
- I'd better be on my way. Good night, kids.
- Suppose a person could not possibly scream?
- Evening, Doc. Come to see the show?
- No, thanks, not tonight. I just dropped by to see how you were doing.
- How's your experiment going on?
- As a matter of fact, I dropped by because I was a little worried about your wife.
- A shock like that can have pretty bad after-effects, you know.
[...]