1A6D#. Cello-1 Simulation x300 slower

[ 3/19/2020 ]     Labels: 1A6D#.Resonance A

D# (1A6D#, 313Hz, 3.20mS) Typical Resonance Simulation:
Oscilloscope charts below show us a clear gap in phase between V-mic and H-mic.
In this case, the resonance direction is not along round-slice-level of cello but along the height(neck - tail pin).

Without endpin(left) vs Steel-pipe endpin floating(right)
Titanium endpin on floor(left) vs 8mm Metal-rod endpin on floor(right)
Cello: Cello-1 (8-year-old)
300 times slower, silent video

Reference post: -- https://advancedendpinholder.blogspot.com/
 -- 93..Resonance Direction-A2
 -- 93..Cello-1, Cello-2 on A -Resonance Direction-

   

 

3G9E. Cello-1 Wolf-tone Simulation x100 slower

[ 3/04/2020 ]     Labels: 3G9E.Resonance G

 

Wolf tones are relating with the pure(/simple, perfect) vibration of top-plate.
When the E(/F) pitch forced to shift slightly high or low, top-plate gives up the current wave cycle then creates a new one.

Cello: Cello-1 (8-year-old)
100 times slower, silent video

Reference post:
--> https://advancedendpinholder.blogspot.com/
--> 63.Wolf tone
--> 63. Memo for wolf tones