This will determine if that sound in the background is something unique and traceable.

8 seconds sound clip from Batman (1966) - The Bat's Kow Tow (S2E30) TV Series.

You can hear this line at 00:13:40 in the Blu-ray version of the movie.

Quote context

[...]

- Not at all. But Why?

- I heard a strange noise in the background. We might just be able to identify it on the Bat-sound Analyzer.

- Courage. We'll have your voice back before you can say Jack Robinson.

- Come on, Robin. There's not much time.

- Think it'll work, Batman?

- It has to work, Robin. The world's at stake.

- This will determine if that sound in the background is something unique and traceable.

- Batman, there's something I don't understand.

- I realize that losing the power of speech is an awful thing, but why do you feel that the whole world's at stake?

- Simple. If we couldn't talk, there'd be no telephones. You see, there are millions of people who use telephones in business every day.

- Now they'd have to meet their clients face-to-face. That would cause enormous traffic problems.

[...]