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Biofeedback refers to a method that uses technical means to make biological body processes and states that are not consciously perceived visible. The devices react to a certain physical or physiological function BGG audible, visible or palpable signals.
Biofeedback devices can be used, for example, for targeted breathing exercises by influencing the heartbeat and relaxing it. Likewise, corrective mirrors are considered biofeedback devices that visually horn movement or speech exercises.