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Brain Acoustic Monitor (BAM)
The brain acoustic monitor (BAM) measures pulsatile activity in the head and compares it with the driving (or source) pulsatile activity generated by the heart. Both are measured with noninvasive passive acoustic sensors – applied, respectively, to the forehead and to the radial, brachial or other suitable reference artery. By comparing different features of the two waveforms in both time and frequency domains it is possible to determine whether cerebral blood flow has been disrupted thereby flagging the potential for traumatic brain injury. Now presently being used by the US Government in Iraq for traumatic brain injury. Developed by Active Signal Technologies and is available for licensing through IHS.