Chapter 796: 252. Old Friends in a Foreign Land_3

Roymin once again stumbled over the lack of a corresponding word in the Ulnas Circle language.

She scratched her short hair on her head, looked at the gramophone, and said with some frustration:

"I think you guys are very strange, very strange. You've already invented the gramophone, but you don't know the existence of that kind of wave. This doesn't make sense."

Noland Lee looked at the gramophone, recalled Roymin's words, and roughly understood the "wave" that the other party wanted to say.

It was most likely infrasound, a type of acoustic wave with a frequency below 20 Hz.

Infrasound decays slowly and is less absorbed by water and air, making it suitable for dealing with underwater sea monsters.

Noland Lee searched his mind for vocabulary from his native world and unexpectedly found the term "infrasound" in the Tatis language.

"Akmeri..." Noland Lee mentioned the word "infrasound" in Tatis language: