Long after the game has ended and the TV has been shut off, the vuvuzela continues to echo in our ears. The plastic stadium horn, blown by World Cup fans to celebrate such moments in a game as -- well, every moment -- has achieved unprecedented fame and rancor this Cup, as its B-flat drone is broadcast around the world.
From German blog Surfpoeten comes a DIY solution for home Cup-watchers driven to distraction by the stadium horns: a software filter that selectively mutes the particular frequency of the vuvuzela. The horn drones, apparently, at 233 Hz, with harmonic overtones at 466 Hz, 932 Hz, and 1864 Hz.Tube, the inventor behind Surfpoeten, runs the audio from his TV through a Mac Mini running Logic Express. A series of bandpass EQ filters in the software neatly excise the offensive frequencies, leaving the game blissfully vuvuzela-free.
Tube isn't the only one with that idea -- I noticed at least one pub in New York yesterday doing the same with a component graphic equalizer hooked to a giant TV. For those of you following at home, that's 233, 466, 932, 1864.
In-person spectators at the games still have little recourse. Perhaps in 2022, when we all attend holographic games at our home stadia, EQ filters will be built in.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.