![]() The musical contest is an original idea to provide scientific information to the public, inviting people to “feel” the science and to think about art. The MAARBLE contest of musical composition combines scientific and artistic ways of thinking, i.e. The way these waves sound, when played through an audio system, defines their name: sferics, tweeks, whistlers, chorus, and hiss. These sounds correspond to several types of radio emissions propagating in the Earth’s atmosphere, ionosphere and magnetosphere. After converting electromagnetic (radio) waves into acoustic (sound) waves, with the same frequency, the sounds produced by our planet can be “heard”. A VLF receiver consists of an antenna and a radio amplifier, and it is sensitive to radio waves. Radio waves can be detected by our ears if we convert them to sound waves, by using a very low frequency (VLF) receiver. We could “hear” them if we had radio antennas instead of ears. They are electromagnetic waves and not acoustic ones. ![]() Although most of these waves are in the acoustic frequency range, they are not audible by humans. ![]() ![]() Planet Earth is a natural source of radio waves, which surround us all the time. The MAARBLE “Sounds of Space” Musical Composition Contest ![]()
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