Acoustically Signal Experimenter
Using this keyword makes DMDX repeatedly sound the bell at the end of the item. N specifies frequency (in milliseconds) of the bell sounding again, the default being 2500ms. This can be used in conjunction with <VisuallySignalExperimenter>, if both are used the frequency of the last one specified is used. If acoustic stimuli have been used this bell will be suppressed unless Remote Monitoring is used.