Idea for keeping aggressive fauna away

How would you feel about a base building piece that emits sound waves of something similar, in order to keep agressive fish away from your base? Perhaps to balance it, a requirement to scan the aggressive fish first, in order for the scanner to identify it's natural enemies/predators, and then perhaps also a requirement to scan said creature too, before the sonic emitter is able to recreate the sounds that would scare the specific fauna away.

Perhaps also a portable version of this device, that you can carry along with your tadpole in order to stay a little more safe, but with the added tradeoffs in inventory space.