Faculty of String Instruments, Harp, Guitar and Luthiery, I. J. Paderewski Academy of Music, św. Marcin 87, 61-808 Poznań, Poland.
J Acoust Soc Am. 2011 Oct;130(4):2186-94. doi: 10.1121/1.3626194.
Similarities and differences in vibrational behavior of two guitars having a symmetric Torres bracing pattern and an asymmetric pattern forming a lattice on a soundboard are investigated by means of the modal analysis technique and laser Doppler vibrometry (LDV) measurements. Instruments are investigated before and after a bridge and strings assembling (i.e., they are incomplete or complete). The bracing pattern and the absence/presence of the bridge and strings have some effect on modal frequencies and mode shapes. The bracing pattern does not affect the sequence of at least first three low frequency mode shapes of incomplete/complete instruments but affects their modal frequencies. Depending on frequency, the bridge behaves either as a rigid or a flexible structure.
通过模态分析技术和激光多普勒测振（LDV）测量，研究了具有对称 Torres 支撑图案的两把吉他和在音板上形成格子的非对称图案的振动行为的相似性和差异性。在安装琴桥和琴弦之前和之后（即，它们是不完整的或完整的）对乐器进行了研究。支撑图案以及琴桥和琴弦的存在/缺失对模态频率和振型有一定影响。支撑图案不会影响不完整/完整乐器的至少前三个低频振型的顺序，但会影响它们的模态频率。取决于频率，琴桥的行为要么是刚性结构，要么是柔性结构。
