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Tallinn University of Technology
Department of Cybernetics
Laboratory of Solid Mechanics
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Title
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Application of high-speed line scan camera for string vibration measurements
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Authors
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Dmitri Kartofelev, Mirko Mustonen, Anatoli Stulov
Centre for Nonlinear Studies, Institute of Cybernetics at Tallinn University of Technology, Tallinn, Estonia
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Vesa Välimäki
Aalto University, School of Electrical Engineering, Department of Signal Processing and Acoustics, Espoo, Finland
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Abstract
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A novel high accuracy experimental equipment for acoustical measurements of vibrating objects has been designed and built. This set-up consists of a high frame rate line scan camera and a custom-built optical lens system. The optical tube is designed to capture maximum amount of light, as well as to provide sufficient magnification. The experimental set-up gives possibility to perform accurate non-invasive measurements of vibration of various parts of musical instruments, such as the strings, bridges, necks, etc. The set-up has been calibrated and successfully used to capture the piano and bass guitar string motion. In addition, the captured video data are presented and explained. A robust method of the vibration data extraction from the recorded video file is presented.
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Status
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The presentation was presented at the ISMA 2014 conference. The conference was hosted by the University of Maine, Le Mans, France on July 7–12, 2014.
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Application of high-speed line scan camera for string vibration measurements
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Slides of the presentation given at the ISMA 2014 conference:
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Slides: Slides.pdf
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Paper published in the conference proceedings:
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Paper: Paper.pdf
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The work of D. Kartofelev, M. Mustonen and A. Stulov was supported by the EU through the European Regional Development Fund, and by the Estonian Ministry of Education and Research (SF0140077s08). The authors are grateful to the Aalto University funding scheme for infrastructure. Conference travel expenses of the first author where financed by Doctoral Studies and Internationalisation Programme DoRa T8 (Archimedes Foundation, Estonia). Special thanks goes to Aigar Vaigu (Metrology Research Group at Aalto University, Espoo, Finland), Julian Parker (current affiliation: Native Instruments, Berlin, Germany), and Heidi-Maria Lehtonen (current affiliation: Dolby Laboratories, Stockholm, Sweden) for their advice and help with the design and construction of the experimental equipment.
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Application of high-speed line scan camera for string vibration measurements
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