Example of measured PSDs, TFs, derived occlusion effects and MSCs in the left ear of one participant producing running speech. Column (a): both ears open (open ear condition in the sequential measurement), column (b): ipsilateral ear occluded (occluded ear condition used in both the sequential and the simultaneous measurements), column (c): same as (b), but the reference changed from the contralateral sound pressure to the ipsilateral sound pressure outside the device (simultaneous measurement), column (d): derived occlusion effects: PSD-based (top) and TF-based (bottom).