Baseline System
Figure 1 shows a simplified schematic of the baseline system. For simplicity, not all signal paths are shown. A scene generator (blue box) creates the speech in noise (SPIN) that the hearing aid model then enhances (yellow box). This enhancement is individualised for each listener, hence there is also a system to select a random listener (white ellipse) with a particular set of pure tone air-conduction thresholds or audiograms.