MEMS Speakers on the rise, page-29

My initial issue was that the claimed electrostatic driver would not be able to produce a waveform with SPL even approaching what a similar sized traditional speaker can generate.

Some have since suggested a piezoelectric membrane is being used instead. The most powerful example of such that I could find was part of a research paper a few years ago, not a production unit, and that was still an order of magnitude below what Audiopixels is claiming they can put out. I modified my opinion at that point to say it's -possible- the company can achieve headphone level audio with this device, though even that will be a big engineering challenge. They'd still be solving multiple research paper level cutting edge problems, and after they'd done that I'd still not be confident they'd be able to deliver a single advantage over a traditional set of headphones due to cost and possible issues around the size of the grid and how that would deliver sound to the ear as part of a headphone package.