HSS Hypersonic Sound - Wikipedia (article link)

Elwood "Woody" Norris, founder and Chairman of American Technology Corporation (ATC), announced he had successfully created a device which achieved ultrasound transmission of sound in 1996.[5] ATC named and trademarked their device as "HyperSonic Sound" (HSS). In February 1998, HSS was named the Best of What's New for 1997 by readers of Popular Science [6]. In December 2002, Popular Science named HyperSonic Sound the best invention of 2002.[citation needed] Norris received the 2005 Lemelson-MIT Prize for his invention of a "hypersonic sound".[7] ATC (now named LRAD Corporation) spun off the technology to Parametric Sound Corporation in September 2010 to focus on their Long Range Acoustic Device products (LRAD), according to their quarterly reports, press releases and executive statements.[8][9]

http://en.wikipedia.org/wiki/Sound_from_ultrasound

The HSS technology uses ultrasound distribution, so the audio can be broadcast in narrow beam similar to laser. HSS allows highly focused sound beam, therefor significantly minimizing the noise level in closed or opened area.

http://www.directional-sound.com/en/products/hyper-sonic-sound

Possible organized crime applications: sleep deprivation, criminal harassment, threats and intimidation, ideation and psychological manipulation, suicides.