05-08-2022, 12:47 PM
Acoustic levitation allows small objects, like droplets of liquid, to float. Unless you travel into the vacuum of space, sound is all around you every day. But most of the time, you probably don't think of it as a physical presence. You hear sounds; you don't touch them. The only exceptions may be loud nightclubs, cars with window-rattling speakers and ultrasound machines that pulverize kidney stones. But even then, you most likely don't think of what you feel as sound itself, but as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words, sound can levitate objects on Earth or in gas-filled enclosures in space. Independent filmmakers like Spike Lee often release new remastered versions of their films. Digital technology has not only allowed filmmakers and musicians to create inspiring new works of art, but it's also given audio engineers and film editors the chance to reach back and restore classic albums and movies to their original grandeur. Remastered CDs and DVDs promise consumers a crystal clear, artistically faithful reproduction of their favorite music and films. Led Zeppelin fans rush to the record store every time the band issues another "definitive" remastered collection of its pioneering rock albums of the 1960s and 70s. And companies like the Criterion Collection have created a market for painstakingly restored, high-definition DVD releases of classic, foreign and independent cinema from filmmakers like Jean-Luc Godard, Akira Kurosawa, and Spike Lee. Many listeners complain that remastering CDs, especially in the age of the MP3, is nothing but an excuse to make the music louder and overproduced. what is qanon
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