| The proliferation of consumer-grade drones has placed a new tool in the hands of people with mischievous intent. Unmanned aerial vehicles ca...
| The proliferation of consumer-grade drones has placed a new tool in the hands of people with mischievous intent. Unmanned aerial vehicles ca...
| The prototype loudspeaker system is housed in a 90 cm (36 in) high enclosure, details of which are shown in this article. The drive unite...