| 摘要 |
A device (23) for detecting head movement of an individual during an activity of the individual is provided. The device (23) includes a weighted wheel (46) for establishing a reference with respect to an initial position of the individual's head, and a first angular encoder (24) and second angular encoder (26) for detecting angular movement of the head with respect to the reference. The detected head movement is processed by a controller (28) and the output is provided by a display (34) and a speaker (36).
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