A method and a device for slot parking of a mobile vehicle, the slot parking includes positioning, locking, unlocking and realigning phases, the method using elements to evaluate available parking space relative to immediate surroundings. The switching mechanism allows the accessible host to access an external storage device when the switching mechanism is in a first configuration. The housing and tube nipple are configured and arranged such that the angle between a longitudinal axis of the tube nipple and the vertical axis is obtuse, minimizing the stress on the ear canal when the flexible eartip is inserted therein. In addition, modifying S35 the determined excitation signal by reducing power and spectral fluctuations of the excitation signal to provide a smoothed output signal. The ruggedized apparatus can be used reliably and effectively in uncontrolled environments, such as, for example at a crime scene to collect and analyze forensic data, as well as in semi-controlled environments, such as, for example at a point of care location.