High speed electronic speckle pattern interferometry as a method for studying the strike on a steelpan.
Andrew C. Morrison, Thomas R. Moore, Daniel W. Zietlow · The Journal of the Acoustical Society of America · 2011
Electronic speckle pattern interferometry (ESPI) is a useful method for characterizing the operating deflection shapes and modes of vibration of musical instruments. Using ESPI in conjunction with a high-speed camera, capable of capturing images at rates of several thousand frames per second, allows for time-resolved examinations of transient motion. High-speed ESPI movies of note strikes of a low-tenor (also called a soprano) steelpan were acquired while simultaneously recording the sound of the strike. The comparison of the time-resolved interferometry data with the analysis of the sound recordings allows for insights into the evolution of coupling between note areas.