50. C(66Hz) Endpin-tip vibration data

[ 3/29/2017 ]     Labels:  48..Beat.Endpin

[ comment ]
On a stand(,endpin is floating in the air),
bridge takes natural beat pattern (e.g. 4->3->2->3->2-) during fading out, and the endpin-tip unexpectedly ceases the vibration in a short time.

With endpin and placed on the floor,
both bridge and endpin keep mainly constant 4-beat, moreover the endpin has a long vibration duration.

On Advanced Endpin Holder(AEH-011),
bridge has rather a similar beat pattern to the case of 'floating' cello and the beat of endpin-tip is also similar to the bridge. The duration time of the endpin-tip is medium between above.


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3 sec after a C(66Hz, open string) pizzicato
Cello: 110-year-old German cello
Endpin: 10mm(D) steel pipe, 28cm(11in) below tailpin
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Please remember some findings at Label-47.(Propagation).
(1)The beat pattern of bridge very linked to that of the center area of top plate.
(2)Without the endpin, cello body naturally faded out taking beats e.g. 4->3->2->3->2->1, but when with the endpin and placed on the floor, the bridge kept characteristic flat 4-beat.

In this case, 110-year-old instrument is probably consisted of stiff wood, although the results might be slightly different from Label-47., but the structure of the cello is basically the same. Common inclination should also be expected.