Another fall detection system uses a mobile phone, which
uses the accelerometers of the mobile phone. However, this
approach requires the patient to wear a mobile phone in a shirt
with left side chest pocket with the phone facing in the correct
position. This can raise health concerns, due to proximity to the
patient's heart [10]. A system proposed by Chang et al.,
performs a similar action using a mobile phone and
accelerometer, however, it has never been tested in case of
unconsciousness patients