A wearable safety device assembly is disclosed. The assembly includes at least one sensor configured to obtain one or more signals from a user. One of the at least one sensors comprises a vestibular (and startling/surprise related) motion sensor specially configured to obtain vestibular (and startling/surprise related) signals. Vestibular (and startling/surprise related) data indicative of a users vestibular (and startling/surprise related) state is extracted from the one or more signals and used to determine whether a user is undergoing an event such as a fall or a startling movement. When it is determined that a user is undergoing an event, the processor of the wearable safety device transmits an activation signal to the safety device. Optionally, the processor may transmit data and information related to the vestibular (and startling/surprise related) system and recorded signals to a data repository.
