Is there a device that lets you listen to music/etc.,without having to have any gear on/in "you and/or your attire", whereby you're the only one who can hear it in a room full of people?

The N1. The device looks like a little soundbar that you place on a desk in front of you. Unlike a soundbar, however, it’s not meant to fill a room with audio. Instead, Noveto claims it can transmit ultrasound through the air and place it near your ears, giving you a private listening experience that shouldn’t bother your coworkers or roommates.

Noveto also says it has face-tracking tech which allows the sound to adjust to your head movements, theoretically providing three-dimensional audio. It can connect to devices via WiFi, Bluetooth, USB-C, or a 3.5mm headphone jack, so pretty much anything you use to listen to music should be compatible with the N1.

There’s one gigantic caveat to this: Mashable didn’t send anyone to CES this year due to the whole pandemic thing, so none of us have been able to test the N1. Beaming audio directly from a speaker to someone’s ears without annoying other people nearby is a lofty, futuristic promise that we haven’t really seen take off in mainstream audio hardware. If it works, it could be incredible. But if there are even tiny issues, like if the audio takes too long to adjust when you move your head or if the private listening isn’t so private after all, the entire experience could be disappointing or even outright useless.

https://mashable.com/article/noveto-n1-soundbar-headphones

https://apnews.com/article/new-tech-device-sound-beaming-noveto-38327ae5fe116080a5eaf2374eb0f5c8