Acquisition of Low Level Sound and Vibration Measurements System

将获得能够测量响应微力的低电平声音和振动的仪器。该仪器由4个主要部件组成：(1)电波暗室，(2)扫描激光测振仪，(3)双通道紧凑型光纤测振仪，(4)除氧系统。消声室降低了背景噪音和振动。目前，背景噪声是最新发展起来的振动声学成像方法的主要限制因素。扫描激光测振仪可以测量埃级范围内的振动，并确定响应小点力的运动的空间分布。双通道光纤测振仪将用于同时测量物体两点的振动。最后，除氧系统是为水箱实验提供清洁和完全脱气的水所必需的。研究生、研究实习生和研究员以及高级调查人员将使用上述仪器。这些设备的加入将有助于吸引更多符合条件的学生进入生物医学成像专业。

Instrumentation will be aquired that will enable the measurment of low level sound and vibration in response to micro force. The instrumentation consists of 4 main components: (1) an anechoic chamber, (2) a scanning laser vibrometer, (3) a dual channel compact fiber vibrometer, and (4) a de-aeration system. The anechoic chamber reduces the background noise and vibration. Presently, background noise is the main limiting factor in the newly developed imaging method called vibro-acoustography. The scanning laser vibrometer allows measurment of vibrations in angstrom range and determination of the spatial distribution of motion in response to a small point force. The dual-channel fiber vibrometer will be used to simultaneously measure vibration at two points of the object. Finally, the de-aeration system is necessary to provide clean and completely degassed water for water tank experiments. Graduate students, research trainees and fellows, and senior investigators will use the above instrumentation. Addition of these equipment to will help to attract more qualified students in the Biomedical Imaging track.