Arterial blood pressure 1 Blood pressure 1 Functional near infrared spectroscopy 1 Haemodynamic response Infrared devices 1 Infrared spectroscopy signals 1 Mayer waves 1 Near infrared spectroscopy 1 Neurons 1 Physiological models 1 Power spectrum 1 Power-spectra 1 Short channels 1 Signal-processing 1 Spectroscopy measurements 1 Spontaneous oscillations 1 adult 1 article 1 bandwidth 1 female 1 functional near-infrared spectroscopy 1 human 1 human experiment 1 male 1 oscillation 1 quantitative analysis 1 signal processing 1 speech 1