Sometimes, you want your public conversations to be private. At places like hospitals and pharmacies, you don't want everybody overhearing what you're saying, but it's weird to whisper. That's why Yamaha created the VSP-1 Noise Generator: to make eavesdropping impossible.
The little box plays sounds such as a babbling river, a forest or "urban clutter" to help mask what you're saying. Apparently, they work very well! So well, in fact, that Yamaha thinks they're worth a whopping $1,200 apiece. Yeah, I'll stick to whispering, thanks.