Optical Probe Design for Objective Control of Audio Sensing

The issues of objectivizing the work of sensory systems, human perception of external stimuli and the presence of a reaction are relevant today. Objective control is in demand in the Paralympic and professional selection, in pediatrics and neurology. For this task, electrophysiological methods are currently used to estimate evoked neural activity in the cerebral cortex. The control of metabolism and hemodynamics in the area of neuronal activation due to neurovascular conjugation is carried out by the methods of positron emission and magnetic resonance imaging. In this case, the near infrared spectroscopy (NIRS) method is relevant and promising, but it has limitations in its use on the scalp with hair. In this paper, a specifically designed optical probe and its positioning are experimentally investigated by the frequency domain and continuous wave NIRS methods.