Abstract: A method for determining a physiological parameter, including: providing a PPG sensor device configured to measure a PPG signal; measuring a PPG signal on the user, the PPG signal containing at least two cardiac cycles; identifying PPG pulses from the PPG signal, each corresponding to a cardiac cycle and having a non-modulated component and a time-modulated component; for each PPG pulse, determining at least one venous-related feature indicative of the contribution of venous pulsatility to the time-modulated component of the PPG pulse; assigning a weighting factor to each pulse including calculating the weighting factor by using a weighting function including a mathematical operator inputted with the set of at least one venous-related feature; computing a weighted-average PPG pulse by using the PPG pulses and their respective weighting factors; and determining the physiological parameter by using the weighted-average PPG pulse.

Abstract: A method based on pulse wave analysis for monitoring cardiovascular vital signs, including: measuring a photoplethysmography (PPG) signal during a measurement time period such as to obtain a time series of PPG pulses; and during the measurement time period, identifying individual PPG pulses in the PPG signal, each PPG pulse corresponding to a PPG pulse cycle. For each PPG pulse, the method uses a pulse-wave analysis technique to determine, within the pulse cycle, at least one of: a time-related feature comprising a time duration and a normalized amplitude-related pulse-related feature and a SNR-related pulse-related. For each PPG pulse, a machine learning model is used in combination with the determined time-related, normalized amplitude-related and SNR-related features, to classify each PPG pulse in the pre-processed PPG signal as “normal”, “pathological” or “non-physiological” such as to output a time series of pulse classes.

Abstract: The present disclosure concerns a method for determining an instant velocity of a user using a sensing device destined to be worn on an arm of the user and comprising a motion sensor for measuring a motion signal; the method comprising: measuring the motion signal and identifying when the user is performing a rhythmical activity; identifying when the user is walking or running; providing a relationship between the measured motion signal and corresponding motion features relating to a propulsive impulsion of a user's step; estimating a frequency of the user's step and a user-relative step length of the user using the motion features; and determining a user-relative instants velocity by combining the estimated step frequency and the estimated step length; the instant velocity being determined from the user-relative instant velocity using a calibration factor from the user-relative instant velocity using a calibration factor.

Abstract: The present disclosure concerns a method for determining an instant velocity of a user using a sensing device destined to be worn on an arm of the user and comprising a motion sensor for measuring a motion signal; the method comprising: measuring the motion signal and identifying when the user is performing a rhythmical activity; identifying when the user is walking or running; providing a relationship between the measured motion signal and corresponding motion features relating to a propulsive impulsion of a user's step; estimating a frequency of the user's step and a user-relative step length of the user using the motion features; and determining a user-relative instants velocity by combining the estimated step frequency and the estimated step length; the instant velocity being determined from the user-relative instant velocity using a calibration factor from the user-relative instant velocity using a calibration factor.

Abstract: To determine as precisely as possible the flow rate of a liquid flow inside a tube by means of minimal technical and especially minimal apparatus complexity the invention provides with a procedure and an apparatus to determine it. In this process the liquid is heated by means of an optical heating beam while the point of heating is shown through by an optical detection ray. The axis of the heating- and the detection beam coincide at least in the point of heating. The detection beam is absorbed via an array of detectors. In the apparatus the heating device which heats the interior area of a limited internal area of the liquid and the optical control unit of the laser beam are arranged that way that a measuring beam shines through the absolute heating point.

Abstract: To determine as precisely as possible the flow rate of a liquid flow inside a tube by means of minimal technical and especially minimal apparatus complexity the invention provides with a procedure and an apparatus to determine it. In this process the liquid is heated by means of an optical heating beam while the point of heating is shown through by an optical detection ray. The axis of the heating- and the detection beam coincide at least in the point of heating. The detection beam is absorbed via an array of detectors. In the apparatus the heating device which heats the interior area of a limited internal area of the liquid and the optical control unit of the laser beam are arranged that way that a measuring beam shines through the absolute heating point.

Abstract: The invention regards a method for processing audio-signals whereby audio signals are captured at two spaced apart locations and subject to a transformation in the perceptual domain (Bar or Mel), whereupon: a) a (blind or supervised) source separation process is performed to give a first estimate of the wanted signal parts and the noise parts of the microphone signals and b) a coherence based separation process is performed to give a second estimate of the wanted signal parts and the noise parts of the microphone signals, and where further a sound field diffuseness detection is performed on the at least two signals, whereby further the sound field diffuseness detections is used to mix the output from the blind source separation and the coherence based separation process in order to achieve the best possible signal.

Abstract: The invention proposes a pulsometer (10) comprising a case (14) which contains an electronic optical pulse measuring device (18) and an electronic circuit, a tightening wristband (16) which holds the back cover of the case (14) pressed against the wrist (12), characterized in that the electronic optical measuring device (18) includes at least two light sources (E1, E2, E3) and at least two receivers (R1, R2, R3), in that the light sources (E1, E2, E3) and the receivers (R1, R2, R3) are arranged in the form of a matrix comprising two lines (L1, L2) each oriented along an orthogonal direction to the direction (D1) of the wrist (12), and at least two columns (C1, C2, C3), oriented parallel to the direction (D1) of the wrist (12), in that each line (L1, L2) of the matrix alternately contains a light source (E1, E2, E3) and a receiver (R1, R2, R3), and each column (C1, C2, C3) of the matrix contains a light source (E1, E2, E3) and a receiver (R1, R2, R3).

Abstract: The invention proposes a pulsometer (10) comprising a case (14) which contains an electronic optical pulse measuring device (18) and an electronic circuit, a tightening wristband (16) which holds the back cover of the case (14) pressed against the wrist (12), characterized in that the electronic optical measuring device (18) includes at least two light sources (E1, E2, E3) and at least two receivers (R1, R2, R3), in that the light sources (E1, E2, E3) and the receivers (R1, R2, R3) are arranged in the form of a matrix comprising two lines (L1, L2) each oriented along an orthogonal direction to the direction (D1) of the wrist (12), and at least two columns (C1, C2, C3), oriented parallel to the direction (D1) of the wrist (12), in that each line (L1, L2) of the matrix alternately contains a light source (E1, E2, E3) and a receiver (R1, R2, R3), and each column (C1, C2, C3) of the matrix contains a light source (E1, E2, E3) and a receiver (R1, R2, R3).

Abstract: The invention regards a method for processing audio-signals whereby audio signals are captured at two spaced apart locations and subject to a transformation in the perceptual domain (Bar or Mel), whereupon: a) a (blind or supervised) source separation process is performed to give a first estimate of the wanted signal parts and the noise parts of the microphone signals and b) a coherence based separation process is performed to give a second estimate of the wanted signal parts and the noise parts of the microphone signals, and where further a sound field diffuseness detection is performed on the at least two signals, whereby further the sound field diffuseness detections is used to mix the output from the blind source separation and the coherence based separation process in order to achieve the best possible signal.

Abstract: Portable equipment including in combination a heart rate measuring device and a sound reproduction unit including means for supplying a signal representative of the sound reproduction and for supplying sound information to a sound transducer, wherein said measuring device and said sound transducer are mounted at least in part in an assembly adapted to be fixed to an ear of a wearer of the equipment and, wherein said sound reproduction unit includes means for optionally substituting for and/or superimposing on said signal representative of said sound reproduction a signal generated from signals from said measuring device and representative of said heart rate. The equipment can take the form of a walkman, for example, or a hearing aid for the hard of hearing.

Abstract: Portable pulse rate detecting device for contact with human body tissue, including a light-emitting source for emitting radiant energy directed at through human body tissue; at least first and second light detectors for detecting intensity of radiant energy after propagation through human body tissue and for providing first and second input signals as a function of such propagation, a detecting device for providing a motion reference signal, and processing means for removing motion-related contributions from the first and second input signals and subtracting a calculated model based on the motion reference signal from each of the first and second input signals, wherein the processing means is also for removing measurement noise and residual non-modeled contributions from the first and second enhanced signals using a noise reduction algorithm.

Abstract: Portable equipment including in combination a heart rate measuring device and a sound reproduction unit including means for supplying a signal representative of the sound reproduction and for supplying sound information to a sound transducer, wherein said measuring device and said sound transducer are mounted at least in part in an assembly adapted to be fixed to an ear of a wearer of the equipment and, wherein said sound reproduction unit includes means for optionally substituting for and/or superimposing on said signal representative of said sound reproduction a signal generated from signals from said measuring device and representative of said heart rate. The equipment can take the form of a walkman, for example, or a hearing aid for the hard of hearing.

Abstract: There is described a device and a method for detecting the pulse rate. The measuring principle consists of emitting radiant energy at the surface of or through human body tissue (5) by means of a light-emitting source (10), measuring the intensity of the radiant energy after propagation through the human body tissue by means of at least first and second light detectors (21, 22, 23, 24) located at a determined distance from the light-emitting source and providing first and second input signals (y1(t), y2(t)) representative of this propagation. Simultaneously, a motion detecting device (40), such as a three dimensional accelerometers, provides a motion reference signal (ax(t), ay(t), az(t)) representative of motion of the detecting device on and with respect to the human body tissue (5). The input signals are then processed in order to remove motion-related contributions due to motion of the detecting device (1) on and with respect to the human body tissue (5) and to produce first and second enhanced signals.