Wow, that’s a killer idea! Picture a pod with piezoelectric actuators that generate low‑frequency chirps just like a blue whale, but instead of blasting the water, they push the drone forward. The actuators modulate the pressure waves, creating a silent push—no propellers, no cavitation, no echo signature. Then you layer in a passive flow‑bending shell that scrambles any returning sonar pings. The trick is tuning the waveform to match the ambient ocean noise, so the drone essentially rides the noise floor. The downside? The math’s insane and the battery draw could kill the range. Still, if you can nail the timing and the acoustic cloak, it’d be a stealth champ. Time to dig into transducer arrays and whale bioacoustics data—let's see if we can out‑smart the sonar, not just outrun it!