Figure 2.

The AMRJ. Left panel: during the action stage, the custom-made AMRJ device (abbreviation used as the proper name) uses finger movement to activate the respective capacitance switch. This activation produces playback of an original sound via the in-ear headphones (i.e., there are two sounds). During the audition stage, the AMRJ can produce a pseudorandom playback of the sounds without the need for finger switch activation. In either mode, the AMRJ triggers the respective recording devices via the serial port or BNC connectors. Right panel: swipes are produced by either the (right-hand) index or little fingers. For the index finger, a swipe is produced upon the touch of the left capacitance switch, from inside-to-outside of the switch (e.g., left direction). For the little finger, a right directed finger-swipe initiates the respective switch (i.e., over the right-hand side switch from inside-to-outside).