Posts Tagged ‘sound’
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GTA San Andreas – sound test [PC]
Description: FRENCH VERSION: J’ai un petit souci avec Fraps, la vidéo s’enregistre en accéléré, donc je le remet en mode normal avec VirtualDub mais il ya un décalage avec le son. Regardez cet extrait de GTA (il ya une astuce pour aller à l’aéroport). —————————————————— ENGLISH VERSION: I have a small problem with Fraps, video registers in fast, so I put him back in normal mode with VirtualDub but there is a lag with the sound. Watch this clip of GTA (there is a trick to get to Airport).
Video Rating: 4 / 5
The sound of quantum drums
Nanoscale drums provide insight into math, quantum physics and microelectronics Forty years ago, mathematician Mark Kac asked the theoretical question, “Can one hear the shape of a drum?” If drums of different shapes always produce their own unique sound spectrum, then it should be possible to identify the shape of a specific drum merely by studying its spectrum, thus “hearing” the drum’s shape (a procedure analogous to spectroscopy, the way scientists detect the composition of a faraway star by studying its light spectrum). But what if two drums of different shapes could emit exactly the same sound? If so, it would be impossible to work backward from the spectrum and uniquely surmise the physical structure of the drum, because there would be more than one correct answer to the question. It took until the 1990s for mathematicians to prove that, in fact, two drums of different shapes could produce the same sound. In other words, you can’t hear the shape of a drum. That outcome, which was physically verified in one instance with vibrations on the surface of soap bubbles, raised theoretical questions about spectroscopy. READ THE FULL ARTICLE nanotechnologytoday.blogspot.com
Video Rating: 5 / 5
