violin octetSet of eight scaled violins designed by Carleen Hutchins
Luthier, scientist, and founder of the Catgut Acoustical Society
violin construction
corner blocks
sound post
bass bar
ribs
lining strips
neck
scroll
back platefingerboard
tuning pegs
bridge
violin bridge and soundposttransmitting the vibrations
Downward force of strings is about 20 lbs. Supported by sound post and bass bar.
bridge has a rocking motion
Violin response
from Bissinger, Rowe (2007)http://www.acoustics.org/press/153rd/bissinger.html from Hutchins (1981)
A0 is Helmholtz cavity mode (MAR)
A1 is longitudinal cavity mode
CBR, B1 are body modes (mostly top plate)
measurement of 1735 Guarneri del Gesu standing wave patterns
desirable for A0 and CBR to coincide with open strings (D and A)
the violaHistorically, the older instrument
Tuned perfect fifth lower than violin
but strings and body are not 3/2 (50%) larger!
Open string frequencies do not line up as well with air and body resonances.14” 16”