the accoustic recharge was too slow, and the attack timing from the creature was too many
That's the whole point - you can't just spam the Acoustic Emitter every time it's available. You have to choose the right moment to use it and the right moment to hold it.
We might need to update the note's hint to make it easier for players to figure out. We may add that in a future update.
got it but it's difficult to survive since it's the only was to protect us from the sea entity (or maybe i just bad at it)