Those exact ears were reference material for this project.

> I began by looking at the youtube concept video for the necomimi brainwave-controlled ears. My intent wasn't to copy their implementation, but I was curious what kind of motion they had decided on.

The ones that you linked are called Necomimi, I bought them and they still work. The one thing that they should really improve is the quality of the motors because they are extremely loud which kind of defeats the point of having a mode which shows you your meditation state and relaxed state. I wish someone would make an update and improved version. Another thing that bothered me is that it needs FOUR AAA batteries, which is good from the environment point of view. But very bulky and kinda annoying from the UX point of view.

The same company also made a tail, but I didn't have a chance to test it nor did I buy it.

Neat. I bought a pair at PAX many years ago. Sadly they stopped working after a week or so.