https://techcrunch.com/2022/04/28/paper-thin-speaker/

If you’re into cars, you may have heard of vinyl wrapping, which can change the appearance of a car. Engineers from MIT have taken a similarly thin material and created a skinny film that can turn pretty much any surface into a speaker. According to its inventors, it can create high-quality audio with minimal power consumption.

To achieve these properties, the researchers created a fabrication technique. They claim it can be scaled up to produce ultra-thin loudspeakers large enough to cover the inside of an automobile or to wallpaper a room, whispering a promise of immersive sound without an obvious source. The audio nerd in me is definitely feeling a cochlear hard-on coming on. (Yes, that’s a dick joke, but if your cochlear fuzzies were to stiffen you’d be deaf, so anatomically it makes absolutely no sense. The lengths I’m willing to go to for an infantile joke are legendary.)