Abstract: A method of synchronizing output signals from a plurality of sensors each measuring a heart rate derivable physiological signal of a subject along with a physiological signal of interest includes acquiring first and second output signals using respective first and second sensors, where each sensor includes an independent clock for associating its output signal with a respective time domain. The method further includes determining first and second heart rate sequence signals from the first and second output signals, identifying timings of at least one heart rate event in the respective first and second heart rate sequence signals, and determining a first time domain transformation for the time domain of the second output signal to the time domain of the first output signal using a model fitted to the timings of the heart rate event in the respective first and second heart rate sequence signals.

Abstract: The present invention relates to a method (100) and system (1) of synchronizing output signals (S1, S2) from a plurality of sensors (11, 12) each measuring a heart rate derivable physiological signal of a subject. The method comprises providing a first output signal (S1) of a first sensor (11) configured to measure a heartbeat derivable physiological signal of a subject: providing a second output signal (S2) of a second sensor (12) configured to measure a heart rate derivable physiological signal of the subject, wherein each of the first and second sensor comprises an independent clock (11a, 12a) for associating the first and second output signals with a respective time domain.

Abstract: A system (1) is described which is suited for suppressing audio distortion. The system comprises echo cancelling means g1, g2 coupled between an audio output (4) and a distorted desired audio sensing microphone array (3), and a filter arrangement (7) coupled to the echo cancelling means g1, g2 and/or the microphone array (3). The filter arrangements' coefficients represent reverberation distortion in the desired audio sensed by the microphone array (3).