Meinl TF-E-PL Sonic Energy

Meinl Tuning Fork Platonic Year, Planet Tuning Fork, Note: F3, Determination of frequency: Duration of one circular motion of the Earth's axis through all Zodiac constellations from the position of the 3rd planet, Orbital period in years: 25920, Orbital period in days: 9460800, Round trip time in seconds: 8.17973 \* 10^11, Frequency calculation: 1 / 8.17973 \* 10^11 sec = 1.22253 \* 10^-12 Hz, (1.22253 \* 10^-12 Hz x 2) 2^46 = 172.06 Hz, Frequency: 172.06 Hz (47th octave), Shifted standard tuning 440 Hz: A4 / a' = 433.56 Hz, Made in Germany