| 摘要 |
A personal safety device 2 comprises: a housing 4; attachment means (22,fig.3) provided on the housing, the attachment means being configured to receive a shoulder or waist strap or belt (26,fig.5) so as to attach the device to a wearer; a motion sensor arranged to monitor the motion of the wearer; and an alarm configured to be activated when the motion sensor has not detected motion for a predetermined period of time; wherein the alarm comprises at least one sounder 16a,16b disposed within a chamber 10a,10b formed by the housing, the chamber having an outlet passage which is aligned with a longitudinal axis of the strap or belt (26,fig.5). The device is particularly suited to minimizing the problems associated with muffling by the turn-out gear or jacket worn by a fire fighter. |
