Acquisition of Low Level Sound and Vibration Measurements System

将购置仪器，以便测量微力作用下的低水平声音和振动。该仪器由4个主要部件组成：(1)消声室，(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。消声室减少了背景噪音和振动。目前，背景噪声是新发展的振声成像方法的主要限制因素。扫描激光测振仪允许在埃范围内测量振动，并确定运动的空间分布，以响应一个小的点力。双通道光纤测振仪将用于同时测量物体两点的振动。最后，需要脱气系统为水箱实验提供干净、完全脱气的水。研究生、研究实习生和研究员以及高级研究员将使用上述仪器。增加这些设备将有助于吸引更多的合格学生在生物医学成像轨道。

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.