Abstract: Noninvasive auditory attention detection Brain Computer Interfaces (BCIs) could be useful for improved hearing aids in the future. EEG (electroencephalography) has been demonstrated to exhibit useful evidence regarding auditory attention in the presence of multiple competing speech waveforms. This work is a novel attempt to investigate the feasibility of online modulation of sound sources by probabilistic detection of auditory attention, using a noninvasive EEG-based brain computer interface. Proposed online system modulates the upcoming sound sources through gain adaptation which...