RUI: High Speed Electronic Speckle Pattern Interferometer for Undergraduate Research in Musical Acoustics

该奖项支持设计和建造高速电子散斑图案干涉仪，供本科生在乐器研究中使用。特别感兴趣的是在初始瞬态期间和之后的自发性音素和膜性音素的运动。干涉仪的采集速率将超过每秒4万帧，并且能够分辨漫反射物体的亚微米运动。该干涉仪建成后，将用于研究美国五弦班卓琴和钢琴音板过渡到稳态时的瞬态响应。这项工作将证明新干涉仪的有效性，导致对班卓琴头部瞬态运动的首次测量，并为这种复杂乐器的更详细的理论研究提供方向。除了班卓琴外，干涉仪还将用于研究钢琴音板的瞬态运动。新的干涉仪将允许对声板如何过渡到稳态进行详细的调查，并将有助于验证声板的时间相关有限元模型。五弦琴的研究结果将应用于涉及圆膜瞬态现象的各种问题。同样，对钢琴音板的研究将直接应用于对板壳振动的研究。该研究项目还旨在提高实验室吸引和培养本科生，特别是女性研究生的能力。

This award supports the design and construction of a high-speed electronic speckle pattern interferometer for use by undergraduate students in the study of musical instruments. Of specific interest are the motions of idiophones and membraphones during and immediately after the initial transient. The interferometer will have an acquisition rate in excess of 40,000 frames per second and will be able to resolve sub-micrometer motion of diffusely reflecting objects. After construction, the interferometer will be used to study the transient response of the American five-string banjo and the soundboard of a piano as it transitions to the steady-state. This work will demonstrate the effectiveness of the new interferometer, result in the first measurements of the transient motion of the banjo head, and provide direction for a more detailed theoretical investigation of this complex musical instrument. In addition to the banjo, the interferometer will be used to investigate the transient motion of a piano soundboard. The new interferometer will allow a detailed investigation of how the soundboard makes the transition to steady-state and will help validate a time-dependent finite-element model of the soundboard. Results from the study of the five-string banjo will have application to various problems involving transient phenomena in circular membranes. Likewise, investigations of the piano soundboard will have direct application to the study of the vibrations of plates and shells. This research project is also designed to enhance the laboratory's ability to attract and develop undergraduate research students, especially women.