Fig. 4
From: eldBETA: A Large Eldercare-oriented Benchmark Database of SSVEP-BCI for the Aging Population
The histograms of SNRs from the eldBETA, the BETA and the Benchmark databases. The curve denotes the fitted normal probability density function (PDF) of the distribution. The dashed line denotes the mean of the distribution. It is noticeable that eldBETA database has a lower SNR than the BETA database and the Benchmark database. (Best view in color).
