20. C(66Hz) pizz x40slower -Hologram on TopPlate, Bridge, Tailpiece-

[ 08/01/2018 ]     Labels: 20.Vibration-Video

 
Cello's fine vibration of top plate and bridge can be seen on hologram sheets.
C string swings according to the fundamental vibration(period 15.2ms). Oscilloscope provides typical waveforms, in this photo five fine vibrations are contained inside.
-40 times slower, pizzicato, steel pipe endpin 35cm under tailpin-
 

20. Fine vibration of Tailpiece -Hologram-

[ 07/20/2018 ]     Labels: 20.Vibration-Video

 
An appropriate angle of camera and hologram sheet with some good fortune enables us to observe the fine vibrations inside a C(66Hz, 15.2ms) fundamental vibration.
-40 times slower, pizzicato, steel pipe endpin 35cm under tailpin-

20. Vibration of Tailpiece, Tailgut(/saddle) -Hologram-

[ 07/15/2018 ]
A hologram sheet helps us to understand the C(66Hz) fundamental vibrations from a pizzicato are shared also by tailpiece and tailgut(/saddle), not only by C string and top plate.
-40 times slower, C(66Hz) pizzicato, steel pipe endpin 35 cm under tailpin-

20. Vibration of Top plate -Hologram sheet attached-

[ 07/07/2018 ]     Labels: 20.Vibration-Video

 
Top plate vibration video is updated by being attached a hologram sheet.
x40 times slower, C(66Hz) pizzicato.

An attached hologram sheet helps us to know the vibration on top plate of cello.
We can observe fundamental C(66Hz) vibrations on the sheet and also some sub vibrations inside, they seem very well linked to the vibration of C string too.

20. Vibration of endpin tip on AEH

[ 06/23/2018 ]     Labels: 0.Vibration-Video

 
Vibration of endpin tip on AEH-011.
32 times slower, C66Hz Pizzicato, 10mmD endpins(Steel pipe, Carbon, Titanium).
Advanced Endpin Holder improves resonance and response on cello by mitigating the effects from endpin and floor.

20. Vibration of endpin (Carbon, Titanium)

[ 06/12/2018 ]     Labels: 20.Vibration-Video

 
When the both ends of an endpin are fixed, the rod resonates with destined tones and the overtones.
A carbon 10mmD 32cmL endpin and titanium 10mmD 30cmL are also resonate with C(66Hz) mezzo forte pizzicato.

SONY cybershot RX100-4 slow-motion camera

20. Vibration of endpin (mf pizz, 32 times slower)

[ 06/08/2018 ]     Labels: 20.Vibration-Video

 
Endpin (particularly such as: steel pipe 10mmD, 35cmL below tail-pin, anchored on floor) resonates with C(66Hz) mezzo forte pizzicato. See 32 times slower video.
In this video, 125-tempo vibration --> 125 x 32 / 60 --> 66Hz(i.e. C fundamental vibration)

20. Vibration of C string (arco, on floor, 32 times slower)

[ 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。

20. Vibration of C string (arco, on stand -floating-, 32 times slower)

[ 04/26/2017 ]     Labels: 20.Vibration-Video

 

20.Vibration of cello (32 times slower): Top plate

Floating in the air, without endpin
C note (66 Hz, open)
Play: 0.9 second after a pizzicato, 3 measurements
Cello: Filip Kuijken 2011
32 times slower

[ 10/17/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (32 times slower): Top plate

Placed on wooden floor, with steel pipe endpin
C note (66 Hz, open)
Play: 0.9 second after a pizzicato, 3 measurements
Cello: Filip Kuijken 2011
32 times slower

The vibrations of strings are transmitted to the top plate of cello. Meanwhile the movements of the top plate impact to strings behavior.
This and the next slow-motion videos show a strong linkage between the strings and the top plate.

When a cello player plays his/her cello, they can see a vibration-retention-image of strings over the fingerboard. Probably, the behavior of the strings or the beauty of the string-vibration will very well link to the vibration of the top plate and finally to his/her cello sound. Of course string material/brands or player's skill should be taken into account though.

弦の振動と表板の振動は非常によく連動しているように見えます。チェロ演奏時に指板の上に見える弦振動残像・・それは、表板の振動、そして演奏の音とダイレクトに結びついているかもしれません。

[ 10/17/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : Bridge (on the floor)

placed on the floor, with steel pipe endpin
C note (66 Hz, open)
Play: 0.6 seconds after a pizzicato, 3 measurements
Cello: Filip Kuijken 2011
32 times slower

The most important role of the cello bridge is to transmit the vibrations from strings to the top plate.
At the same time, contrary, the vibrations of top plate are transmitted back to strings. These slow-motion videos show an another role: The bridge resolves the potential strain between the strings and the cello body by twisting itself and by taking a beat.

チェロの駒は弦の振動を表板に伝える役割を持っています。しかし同時に胴体の振動を弦にも伝えることになります。これらビデオは、駒自身がゆがみながら弦と胴体間の位置歪を解決する別の姿を持っていることを見せてくれます。

[ 10/16/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : Bridge (without endpin)

floating in the air, without endpin
C note (66 Hz, open)
Play: 0.6 seconds after a pizzicato, 3 measurements
Cello: Filip Kuijken 2011
32 times slower

[ 10/16/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : Endpin

The vibration of a cello is invisible, however the latest super-slow-motion camera technology enables us to observe it.
The tip of the endpin, 11 inches from the cello body that is suspended in the air, is almost sympathetically vibrating with a C (66 Hz) tone from a pizzicato.

Behind the cello, a metronome beats a 200 tempo (3.3 times/sec).
Thanks to the technology of the Sony Cyber-Shot RX100M4. 32 times slower, 960 fps.

32倍スローモーションで見たエンドピンの先端の振動です。C音(66Hz)のピチカート。

振動が伝わっているのがわかります。

-----------------------------------------------------------------------------

( added, 02/02/2017 )

[ 10/15/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video): Tailpiece

G note (98 Hz, open)
Left: placed on the floor, with steel pipe endpin
Right:floating in the air, without endpin
Play: 1.0 second after a pizzicato
Cello: Filip Kuijken 2011
32 times slower

[ 10/03/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video): Tailpiece

C note (66 Hz, open)

Left: placed on the floor, with steel pipe endpin

Right:floating in the air, without endpin

Play: 1.0 second after a pizzicato

Cello: Filip Kuijken 2011

32 times slower

 

[ 10/03/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : Scroll

The cello has 3 major resonant places: The body center, the endpin and the scroll.

 C (66 Hz) pizzicato, 32 times slower,  2 measurements
Scroll swings in 1 beat.
 
チェロの"スクロール・ペグ"の共振動。
チェロの３大共振場所は、①胴体の中心付近、②エンドピン、③スクロール(渦巻き・ペグ)のようです。

[ 9/16/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : C-G-D-A string

C (66 Hz), G(98Hz), D(147Hz), A(221Hz)   -pizzicato-

40 times slower, 960 fps.

In order to minimize any interference, the endpin was removed.
C string swings in 1 beat.

 
エンドピン無しで、チェロの弦振動をスローモーションで撮ってみました。
オシロスコープの表示は、マイクで集音し変換しているために少々時間に遅れがあります。

[ 9/16/2016 ]      Labels:  20.Vibration-Video