Non-contact Measurement Method for Two-Dimensional Transversal String Vibration Using Single High-Speed Camera

Toru KOBAYASHI  Naoto WAKATSUKI  Koichi MIZUTANI 

Publication
A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)  Vol.J95-A  No.7  pp.548-554
Publication Date: 2012/07/01
Online ISSN: 1881-0195
Print ISSN: 0913-5707
Type of Manuscript: Special Section PAPER (Special Issue on Emerging Technologies in Electronics, Information and Communication)
Category: 
Keyword: 
guitar,  high-speed camera,  optical vibration measurement,  string vibration, 

Full Text(in Japanese): PDF(1.2MB)

Summary: 
Optical two-dimensional vibration measurement method, for analyzing stringed instruments, is proposed. String vibration is measured using motion capture with single high-speed camera. This method enables non-contact method to measure two-dimensional transversal string vibration. Including Lissajous patterns of rotary motion, two-dimensional transversal vibration of the string was observed. Moreover, one dimensional longitudinal vibration and one dimensional transversal vibration were measured by the same method, and it is confirmed that influence of longitudinal vibration on measurement result can be ignored. Through this test, the two-dimensional transversal string vibration was observed adequately.