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Fig. 5 | Trials

Fig. 5

From: Motivational nondirective resonance breathing versus transcutaneous vagus nerve stimulation in the treatment of fibromyalgia: study protocol for a randomized controlled trial

Fig. 5

Signal processing pipeline for BarTek device. Real-time signal processing is based on a zero-crossing algorithm with further modifications. It is important to note that zero-crossing detection is based on a dynamically adjusted threshold. The basic signal processing algorithm consists of seven steps

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