F(88Hz) Typical Resonance / Cello-1

 [ 5/31/2021 ]     Labels: 4C5F.Resonance C

The orbit is estimated as a double-loop-orbit or plural double loops of upper F(175Hz).
二重ループ軌道により 2倍波長の F音(88Hz)を作っているようだ。

4C5F. Cello-1 F(88Hz) on C-string Simulation x80 slower

[ 4/30/2020 ]     Labels: 4C5F.Resonance C

 
F note on C-string(88Hz, 4C5F, bowing) Typical Resonance Simulation:
Cello body resonates taking a 2-beat for F(88 Hz). Endpin also resonates itself taking favorite beats according to each material/length with the cello body. As a result, the lower part of body seems to be repressed a little bit when placed on the floor.
(C線のF音、チェロ胴体は２ビートで共振しエンドピンは独自の共振ビートを取っている。その結果、胴体下部の振動が若干押さえられているように見える。)

Cello: Cello-1 (8-year-old)   80 times slower, silent video
Reference post:
--> https://advancedendpinholder.blogspot.com/
--> 94..Resonance Direction-C
--> 94..Cello-1 on C(C-G) Resonance Direction and V/H-Ratio

Left : Without endpin
Right: Floating, with carbon endpin

Left : On floor, with Titanium endpin
Right: On floor, with 8mmD metal-rod endpin

On AEH-011, with carbon endpin