Meinl Tuning Fork Platonic TTF-E-PL
Meinl Tuning Fork Platonic TTF-E-PL, Tuning Fork, Planets series, Description: Duration of a gyroscopic movement of the earth's axis through all zodiac constellations, Position of the sun: 3rd planet, The orbital period in years: 25920, The orbital period in days: 9460800, The orbital period in seconds: 8.17973 x 10 to the power of 11, Frequency calculation: 1/8.17973 x 10 to the power of 11 sec = 1.22253x10 to the power of -12 Hz (1.22253 x 10 to the power of -12 Hz x 2) 2 to the power of 46 = 172.06 Hz, Frequency 172.06 (47th octave), Tone: F3, Shifted standard tuning 440 Hz: A4/a ' = 433.56 Hz, Made in Germany
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