[ 04/26/2017 ] Labels: 20.Vibration-Video
When appropriate pressure and speed applied into a bow, the C string takes a pure C vibration( of 1 beat, 66Hz, cycle=15.2ms) from the beginning accompanied with tiny fluctuation.
In this case, the fingerboard also takes 1 beat synchronized, and the G string widely resonates too.
Be noticed, G string's vibration is not of a 'G' but a 'C', because it is just synchronizing to 66Hz(15.2ms) probably taking 4-beat.
If G string can create a real sound by itself, it is presumed as a C 263Hz(= 2 octave above) sound.
We can find such mechanical resonances here and there on our cello.
C note (66 Hz, open)
Cello: 110-year-old German cello
Strings : Evah pirazzi Weich
with steel pipe endpin on the floor
32 times slower
C線を丁寧に演奏すると、C弦は最初から１ビートの純粋な(Cの)振動をします。この場合、テールピースも１ビートで共振し、G線はGの振動でなく４ビートのC音(=２オクターブ上のC)で共振しているのがわかります。