Fig. 4From: Gated recurrent unit-based heart sound analysis for heart failure screeningThe proposed GRU framework for HF screening. The input of the model is the frame of normalized HS with the length of 960 sampling points. The architecture has two GRU layers with 64 units/layer and a fully connected layer of 3 units (the number of HS categories). The LSTM has the similar framework, but the GRU units are changed to LSTM unitsBack to article page