Arrangement for evaluating noise effect on inner ear caused by surgical interferences at head, has multiple sensors for measuring oscillations of head bone caused by operation tool at multiple places of head

摘要

The arrangement has multiple sensors (1,2,3) for measuring oscillations of head bone caused by an operation tool at multiple places of the head. An optical or acoustic information unit is provided for announcing interior ear sound pressure level (5) determined by an evaluation unit and for warning given during excess border levels.