MRI-R2: Acquisition of a Scanning Laser Doppler Vibrometer System

这个奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。这个项目将为一个多学科的研究项目购买一个扫描振动仪。振动计利用反射激光的多普勒频移来测量物体的非接触振动。在本项目中，振动计将用于研究超声辐射力激发技术，该技术利用两个超声源之间的干涉来非接触地振动宏观和微观对象。该项目的另一个主要目标是使用扫描振动仪进行音乐声学研究。为了产生其特有的音调，乐器是一个复杂的系统，通常包括非线性振荡器，以及复杂的共鸣结构。该项目将使人们能够更彻底地了解这些乐器是如何工作的。本科生将参与研究的方方面面。使用振动计获得的测量结果将有助于更好地了解利用微悬臂梁的超声波辐射力激励所具有的独特能力。这可能会影响依赖微悬臂梁振动的领域，包括超灵敏质量检测和原子力显微镜。由于学术研究人员和实际乐器制造者之间的密切合作，音乐声学研究将产生影响。本科生将有机会与知名研究人员合作，这些研究人员将通过Gustavus？远程访问扫描振动器。网络声学实验室。学生和普通公众将受益于声学和振荡学的课堂演示，这些演示通过网络实验室或网络使用扫描振动器。结果将在演示文稿、出版物和网站上广泛传播。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This project will acquire a scanning vibrometer for a multi-disciplinary research program. A vibrometer uses the Doppler shift of a reflected laser beam to measure the vibration of objects without contact. In this project, the vibrometer will be used to investigate the ultrasound radiation force excitation technique; this technique uses the interference between two ultrasound sources to vibrate macroscopic and microscopic objects without contact. The other major goal of the project is to use the scanning vibrometer for research in musical acoustics. To produce their characteristic tones, musical instruments are sophisticated systems that often involve nonlinear oscillators, coupled to complex resonant structures. The project will enable a more thorough understanding of how these musical instruments work. Undergraduate students will be involved in all aspects of the research. Measurements obtained using the vibrometer will lead to a better understanding of the unique capabilities available using ultrasound radiation force excitation of microcantilevers. This may impact areas that rely on the vibration of microcantilevers, including ultras-sensitive mass detection and atomic force microscopy. The musical acoustic studies will have an impact because of the close collaboration between academic researchers and actual instrument builders. Undergraduate students will have the opportunity to collaborate with well-known researchers who will have remote access to the scanning vibrometer through Gustavus? cyber-enabled acoustics lab. Students and the general public will benefit from classroom demonstrations in acoustics and oscillations that use the scanning vibrometer via the cyber-enabled lab or web. Results will be disseminated widely in presentations, publications, and via a web site.