"What?" Lu Chengen and Lou Jinghui asked in unison.
"I'm working on another technology. It doesn't use electrical stimulation, but ultrasound to stimulate brain cells, while monitoring the state of the brain tissue in real time through echoes and constantly adjusting the ultrasound according to changes in the brain tissue," Song He said.
Lu Chengen and Lou Jinghui were visibly dumbfounded.
"This... is it really feasible?" Lou Jinghui asked. "Electrical current is already difficult enough to control. Ultrasound sounds even harder to control!"
"How effective is it?" Lu Chengen asked.
"I haven't made it yet. I've been busy proving the Song He Manifold recently, so this got delayed. I'll start working on it again tomorrow," Song He said. "In theory, it should be able to achieve extremely realistic effects."
"How realistic?" Lou Jinghui asked skeptically.
"Dream control. Constructing a stable dream with detailed scenery, making it difficult for someone to realize they're dreaming. Even if they do realize it, as long as the ultrasound is strong enough, waking up will still be difficult," Song He said.
"Are you sure? How do you know it can achieve that effect?" Lu Chengen asked in surprise.
"We observed it in experiments on mice. Stimulating sleeping mice with ultrasound at specific frequencies and intensities can make them sleepwalk."
Song He told a lie. The matter of the sea monster controlling Ning Mo's dreams had already been classified as top secret, so he couldn't casually tell others about it.
"Ultrasound dream control is more stable than electrical control. Of course, dreaming also consumes energy, so we'll need to make a Brain-Computer Interface that can provide a small amount of nutrients to the hibernating person's brain," Song He said.
"Controlling consciousness and providing nutrients—wouldn't that make it a brain in a vat?" Lou Jinghui exclaimed.
"There's