Police used the device to emit a painful shrill that forced demonstrators to cover their ears and withdraw while police threw tear gas and stun grenades. "Other law enforcement agencies will be watching to see how it was used," Pittsburgh's police bureau chief told the NY Times. "It served its purpose well."

Whether or not you think the protesters have a right to demonstrate or are anarchists without a permit to march, it's still pretty eye-opening to see tech like that used at home.

As a non-lethal weapon, sound canons have been mounted to vehicles by the U.S Army, installed on American warships to warn incoming vessels, defended private cruise ships against Somali pirates, and were at the ready (though not used) at the 2004 Republican National Convention in New York.

But this is the first time LRAD has been used against U.S civilians. According to reports, 20 people were arrested, but there were no serious injuries. [New York Times]

The image above comes from Aeronvironment, and shows what it wants the prototype in the video below to ultimately look like. DARPA's goal is to have a 10 gram aircraft with a 7.5-centimetre wingspan. They want it to get into tight hiding spaces and send back GPS and image data.

Aeronvironment's progress is also notable because such robots previously couldn't carry their own batteries, and had to use guide wires.

"It is capable of climbing and descending vertically, flying sideways left and right, as well as forward and backward, under remote control," says the company.

[New Scientist]

The Fenstar was built by Team MIRA, which includes students from England-based Warwick University and the Royal Grammar School Guildford. The British Ministry of Defense has already praised the innovation, pointing out that an aircraft that can “Look over walls or into compounds in Afghanistan will prove a real asset to the troops. The only problem so far is figuring out a way to minimize noise. Because, really, what good is a spy when everyone can hear it coming? That's some Get Smart tomfoolery. [Telegraph UK via Geekologie]

The technology is described as an example of “neuromorphic engineering”—hardware and software that tries to emulate human intelligence. Basically, the binoculars point out objects that our brains might have noticed, but not fully processed. The subconscious can detect multiple things at once, but the conscious mind can only focus on one thing at a time. By collecting data using human eyes and then passing the data back to the brain, the binoculars more or less add a second processing loop.

One possible problem: How to fine-tune it so that the binoculars don't just pick up on useless, distracting noise. Brains look for patterns in everything, and will sometimes find them even where they don't exist (i.e. Astrology). What if for every rocket launcher it did notice before us, it also pointed out how one specific mountain range in the distance looks like your mother-in-law's face? [Slashdot via Gizmag]