The invention relates to a method of evaluating an assumed wave propagation speed in a medium, the medium being associated with spatio-temporal signal data, wherein the method comprises:

evaluating (e) the assumed wave propagation speed based on phase properties of the spatio-temporal signal data.

The invention relates to a method of evaluating an assumed wave propagation speed in a medium, the medium being associated with spatio-temporal signal data, wherein the method comprises:

evaluating (e) the assumed wave propagation speed based on phase properties of the spatio-temporal signal data.

A measuring device and measuring system which accurately measure a pulse wave propagation velocity. The measuring instrument includes: a fixing part attachable to and detachable from a subject; a first piezoelectric sensor fixed to the fixing part; a second piezoelectric sensor fixed to the fixing part at a prescribed distance from the first piezoelectric sensor; and an analyzing part for calculating a pulse wave propagation velocity in the subject according to time difference between time of detection of peak voltage by the first piezoelectric sensor and time of detection of peak voltage by the second piezoelectric sensor, and the prescribed distance.

A measuring device and measuring system which accurately measure a pulse wave propagation velocity. The measuring instrument includes: a fixing part attachable to and detachable from a subject; a first piezoelectric sensor fixed to the fixing part; a second piezoelectric sensor fixed to the fixing part at a prescribed distance from the first piezoelectric sensor; and an analyzing part for calculating a pulse wave propagation velocity in the subject according to time difference between time of detection of peak voltage by the first piezoelectric sensor and time of detection of peak voltage by the second piezoelectric sensor, and the prescribed distance.

A method (40) for determining a target speed of sound inside a target region of a medium using an ultrasound imaging system. The method comprises the steps of determining a position of an interface in the medium, determining a first speed of sound of an intermediate region above the interface, and determining a target speed of sound inside a target region below the interface based on at least some of sensed signals and taking into account the position of the interface and the first speed of sound.

A method (40) for determining a target speed of sound inside a target region of a medium using an ultrasound imaging system. The method comprises the steps of determining a position of an interface in the medium, determining a first speed of sound of an intermediate region above the interface, and determining a target speed of sound inside a target region below the interface based on at least some of sensed signals and taking into account the position of the interface and the first speed of sound.

The invention relates to a method for determining the speed of sound in a fluid (1) in the region of an implanted, vascular support system (2), comprising the following steps: a) sending an ultrasonic signal (3) by means of an ultrasonic sensor (4) b) reflecting the ultrasonic signal (3) on at least one sound reflector (5), which is visible in the field of vision (6) of the ultrasonic sensor (4) and arranged at a defined distance at least to the ultrasonic sensor (4) or to a further sound reflector (5), c) receiving the reflected ultrasonic signal (8), d) determining the speed of sound in the fluid using the reflected ultrasonic signal (8).

The invention relates to a method for determining the speed of sound in a fluid (1) in the region of an implanted, vascular support system (2), comprising the following steps: a) sending an ultrasonic signal (3) by means of an ultrasonic sensor (4) b) reflecting the ultrasonic signal (3) on at least one sound reflector (5), which is visible in the field of vision (6) of the ultrasonic sensor (4) and arranged at a defined distance at least to the ultrasonic sensor (4) or to a further sound reflector (5), c) receiving the reflected ultrasonic signal (8), d) determining the speed of sound in the fluid using the reflected ultrasonic signal (8).

A method of processing data for a driving automation system, the method comprising steps of: obtaining sound data from a microphone of an autonomous vehicle; processing the sound data to obtain a sound characteristic; and updating a context of the autonomous vehicle based on the sound characteristic.

Disclosed is a sensor for receiving power from the outside and measuring data on a current state. A smart safety management sensor for measuring safety-related data of a structure includes a detection module installed in a structure and configured to detect a state of the structure at a preset interval, a control module operatively associated with the detection module and configured to calculate a result value based on data received by the detection module, and an output module operatively associated with the control module and configured to receive a result value calculated by the control module and to provide information to a supervisor.