Sound Wave Perception ｢音波感知, onpa kanchi｣ is an Extra skill that Rimuru had acquired from enhancing the effects of Ultra Sound Waves during his training with Hakurou.
Abilities[]
It allows the user to directly detect sound waves with extreme accuracy, and extrapolate the movement and location of other creatures based on them, in a similar fashion to a passive sonar.[1]
References[]
- ↑ That Time I Got Reincarnated as a Slime light novel — Volume 2, Chapter 3