Turn them on.
4 seconds sound clip from the Batman (1966) TV series - Smack in the Middle (S1E2).
You can hear this line at 00:18:07 in the Blu-ray version of the movie.
Quote context
[...]
- Notice priceless jewels in eyes and elsewhere.
- The air vent to the pavilion.
- Good evening, my friends. One and all.
- Ha ha. Hello, hello, hello. He-ello.
[...]