OFweek optical network news: how to listen to the voice of an old record? You might say, just find a gramophone and play it out. But it's not as simple as it is. Now, many old records are faced with the crisis of poor preservation, broken, broken, if the record carrier damage, the audio data will be lost. The two physicists who work on the LHC (big Hadron Collider) are the ones who have saved these old records. Through microscopes and computers, they have broken old records back to life. Before cannot play the record in the camera, artists use painting and sculpture can be precisely reduced he saw the scene, by contrast, record and restore the sound to face more technical challenges. In 1860, the French Scott (douard-L onScottdeMartinville) the first successful sound recorded by modern methods. He designed an acoustic recorder based on the structure of the human ear. The three main structures correspond to the ear canal, the eardrum and the auditory ossicles respectively. The sound is transmitted to the mechanical vibration, acoustic instruments, mane parts then connected on top of a film (corresponding to the ossicles and can make vibration records) (carbon black) in the lampblack coated paper or glass. In this way, Scott gets the map of the sound wave curve in the picture below. This record does contain sound information, but it cannot be restored.