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On the structural and acoustic desig...

Davis, Evan Brugh.

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On the structural and acoustic design of guitar soundboards.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	On the structural and acoustic design of guitar soundboards./
Author:	Davis, Evan Brugh.
Description:	304 p.
Notes:	Chairperson: James Chalupnik.
Contained By:	Dissertation Abstracts International51-04B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9025994

On the structural and acoustic design of guitar soundboards.
Davis, Evan Brugh.

On the structural and acoustic design of guitar soundboards. - 304 p.

Chairperson: James Chalupnik.

Thesis (Ph.D.)--University of Washington, 1990.

An assumed mode model of a guitar soundboard has been built and experimentally verified. The frequency range of interest was from 55 to 880 Hertz, covering the frequency range of the fundamentals of the notes played on the guitar. The guitar soundboard is modeled as an orthotropic plate reinforced with tapered beams using the Rayleigh-Ritz technique. Sound power spectra are computed using the radiation impedance of an equivalent array of piston sources and the velocity distribution computed from the forced vibration analysis of the soundboard coupled to a backing cavity and soundhole. The prediction model is compared to an experimental guitar which was documented by recording mode shapes, Chladni patterns, at 25 steps in the assembly process. The material properties used in the prediction programs were determined experimentally. The major findings of the study were: (1) the bracing system dominates the vibration pattern of the soundboard, (2) bracing patterns are required to improve the radiation efficiencies of the unbraced plates, (3) material property variations in the bracing materials can significantly influence the soundboard's dynamics and (4) plate materials and plate finishes have no significant impact on the radiated sound power spectrum in the modeled range.Subjects--Topical Terms:

783786
Engineering, Mechanical.

On the structural and acoustic design of guitar soundboards.
LDR:02129nam 2200265 a 45 001 947729
005 20110524
008 110524s1990 ||||||||||||||||| ||eng d
035 $a (UMI)AAI9025994
035 $a AAI9025994
040 $a UMI $c UMI
100 1 $a Davis, Evan Brugh. $3 1271204
245 1 0 $a On the structural and acoustic design of guitar soundboards.
300 $a 304 p.
500 $a Chairperson: James Chalupnik.
500 $a Source: Dissertation Abstracts International, Volume: 51-04, Section: B, page: 2019.
502 $a Thesis (Ph.D.)--University of Washington, 1990.
520 $a An assumed mode model of a guitar soundboard has been built and experimentally verified. The frequency range of interest was from 55 to 880 Hertz, covering the frequency range of the fundamentals of the notes played on the guitar. The guitar soundboard is modeled as an orthotropic plate reinforced with tapered beams using the Rayleigh-Ritz technique. Sound power spectra are computed using the radiation impedance of an equivalent array of piston sources and the velocity distribution computed from the forced vibration analysis of the soundboard coupled to a backing cavity and soundhole. The prediction model is compared to an experimental guitar which was documented by recording mode shapes, Chladni patterns, at 25 steps in the assembly process. The material properties used in the prediction programs were determined experimentally. The major findings of the study were: (1) the bracing system dominates the vibration pattern of the soundboard, (2) bracing patterns are required to improve the radiation efficiencies of the unbraced plates, (3) material property variations in the bracing materials can significantly influence the soundboard's dynamics and (4) plate materials and plate finishes have no significant impact on the radiated sound power spectrum in the modeled range.
590 $a School code: 0250.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Acoustics. $3 1019086
690 $a 0548
690 $a 0986
710 2 $a University of Washington. $3 545923
773 0 $t Dissertation Abstracts International $g 51-04B.
790 $a 0250
790 1 0 $a Chalupnik, James, $e advisor
791 $a Ph.D.
792 $a 1990
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9025994