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The global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances are the principal background in the part of the electromagnetic spectrum [2] from 3 Hz through 60 Hz [3] and appear as distinct peaks at extremely low frequencies around 7.83 Hz (fundamental), 14.3, 20.8, 27.3, and 33.8 Hz.
Winfried Otto Schumann (May 20, 1888 – September 22, 1974) was a German physicist and electrical engineer who predicted the Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.
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for Schumann, used in Carnaval, it is a re-ordering of that piece's A-S-C-H motif F, A, E and F, A, F for Frei aber einsam and Frei aber froh , "free but lonely" and "free but happy" in German; the former, his friend Joseph Joachim 's motto ( F-A-E Sonata ), described as "more romantic" than the latter, a "gender-separatist" motto of Johannes ...
The four notes are encoded puzzles, and Schumann predicted that "deciphering my masked ball will be a real game for you." [3] In each section of Carnaval there appears one or both of two series of musical notes. These are musical cryptograms, as follows: A, E ♭, C, B – German: A–Es–C–H (the Es is pronounced as a word for the letter S)
The first piece is in A minor and begins dreamily with hints of melancholy, but concludes with a resolution and hope in A major, looking forward to the next movement.. The second piece is in A major and is playful, upbeat, energetic and positive, with a central section modulating to F major with chromatic triplets in dialogue with the piano.
A frequency vs. time plot (spectrogram) showing several whistler signals amidst a background of sferics as received at Palmer Station, Antarctica on August 24, 2005.A radio atmospheric signal or sferic (sometimes also spelled "spheric") is a broadband electromagnetic impulse that occurs as a result of natural atmospheric lightning discharges.