The Belcerebons used to cause great resentment and insecurity amongst neighboring races by being one of the most enlightened, accomplished, and, above all, quiet civilizations in the galaxy.
12 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 6 sitcom.
You can hear this line at 00:07:47.100 in the Blu-ray version of the TV Series.
Quote context
[...]
- At first, Ford had formed a theory to account for this rather strange behaviour.
- 'If human beings don't keep exercising their lips, he thought, their mouths probably seize up. '
- After a while, he abandoned this theory in favour of a new one.
- 'If they don't keep exercising their lips, he thought, their brains start working.'
- In fact, this second theory is more literally true of the Belcerebon people of Kakrafoon Kappa.
- And what a noisy place Kakrafoon has suddenly become.
- Another method of temporarily blotting out their minds is to play host to a Disaster Area concert.
- This is it. We're starting to dive! We're heading straight into the sun!
[...]