But a hackier way would be to build a parametric speaker that focuses soundwaves into a narrow beam like [Shane] did with this ultrasonic sound gun. As the directivity of a soundwave depends on ...

Ion beam (IB) guns and electron beam (EB) guns are devices that emit charged particles (ions and electrons, respectively) directed in a beam which are used in surface analysis or preparation, particle ...

The Browning M2 .50 Caliber Machine Gun, Heavy barrel is an automatic, recoil operated, air-cooled machine gun with adjustable headspace and is crew transportable with limited amounts of ...

Fast becoming mainstays of gamers and creative pros, 4K monitors are falling in price—but getting more complicated to buy. Here's how to shop for an ultra-high-definition (UHD) display ...

The Transportation Security Administration said it has stopped more than 3,400 guns at airport security checkpoints so far this year, and most of the firearms were loaded. The agency also said it ...

Full HD 1080p is passé. For peak productivity and creativity, consider a laptop with a super-sharp 4K screen. Check out the best we've tested, plus a breakdown of 4K's pros and cons for gaming ...

1364 - First recorded use of a firearm. 1380 - Hand guns are known across Europe. 1400s - The matchlock gun appears. Before the matchlock, guns were fired by holding a burning wick to a "touch ...

The Tri-Beam Assault Rifle has recently been made available ... which displayed a scene from Fallout 76 in which the user engraved "The Gun From Fortnite" under the Tri-BeamLaserRifle using ...

Massage guns can cost about $100 or up to $600. Budget for the type you want and for your needs. What type of massage gun There are heavy-duty massage guns that are top-of-the-line and others that ...

I took on the challenge of finding the best water guns you can buy, precision, testing range, durability and more. Some of our picks of the best water guns are suited for pools, while others are ...

When people shop for a TV these days, a high-resolution, 4K screen is practically a given. But 4K computer monitors are still a luxury, unless you’re editing photos or videos professionally ...