Leave it to a 12-year-old boy to come up with a smartphone attachment with the sole purpose of irritating people; that's exactly what the Annoyinator by Henry Crome is. Of course, it doesn't take a genius to figure that thanks to the extremely transparent name. Created in collaboration with his father, Caleb Crome, it attaches to the iPhone or iPad to direct noise to a specific area.
Essentially a funnel of sorts, the Annoyinator by Henry Crome might be tailored to the task of annoying, but it could easily be used to direct more pleasant sounds as well. It was recently launched on Kickstarter. It managed to raise nearly double the funding goal. Looks like a lot of people want to exercises their annoying habits.