Microtech2010 2010

Triaxial Accelerometer for Placement Inside the Ear Canal

T. Kwa, G. Pender, J. Letterneau
Endevco Corporation, Meggitt Sensing Systems, US

Keywords: accelerometer, triaxial, in-ear, shock, brain, trauma, TBI


A second generation MEMS-based in-ear shock measurement system fitting deep into the ear canal has been developed to measure traumatic brain injury (TBI). It consists of the world’s smallest triaxial accelerometer die, a shielded flex circuit for signal transmission, a 3-axis analog signal conditioning module, and an instrumentation data recorder using flash memory which supplies excitation voltage, adjustable anti-aliasing filtering and amplification. It is the world’s first and only triaxial accelerometer to fit deep inside the ear canal. Applications for this device are in motorsports, football and military missions.
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