A medical device includes an acoustic transducer, which is configured to sense acoustic waves emitted from a body of a living subject in response to a periodic physiological activity and to output an electrical signal in response to the sensed waves. Processing circuitry is configured to compute respective autocorrelations of the electrical signal for a plurality of different times within a period of the physiological activity, to transform the respective autocorrelations to a frequency domain, and to render to a display, responsively to the transformed autocorrelations, a graphical representation of a spectral distribution of an energy of the acoustic waves over the period.

Systems, methods and computer-readable media are disclosed for providing therapeutic auditory stimulation. Consistent with disclosed embodiments, a system for providing therapeutic auditory stimulation may comprise a diagnostic unit that computes an EEG spectral density of a patient and a heart rate spectral density of a patient and provides values for one or more EEG frequency bands and one or more heart rate frequency bands. The system may also comprise a therapy unit that generates, based on the provided values, one or more stimulation waveforms corresponding to one or more of the EEG frequency bands and provides the stimulation waveforms for therapeutic auditory stimulation. The stimulation waveforms may comprise audible carrier frequencies modulated by signals with frequencies that vary exponentially with time. The EEG frequency bands may comprise the delta, theta, alpha, beta 1, beta 2, and gamma EEG frequency hands.

The present disclosure relates to a computer-implemented method for providing feedback during scanning of a dental object, comprising the steps of obtaining scan data of the dental object; generating a digital three-dimensional (3D) representation of the dental object based on the scan data; obtaining new scan data of the dental object; generating an updated digital 3D representation by adding the new scan data to the digital 3D representation; determining added information to the digital 3D representation by comparing the new scan data to at least one of the digital 3D representation(s) and/or by comparing the updated digital 3D representation to the digital 3D representation(s); and providing a feedback signal; wherein the feedback signal correlates with the added information and/or a determined overlap. The present disclosure further relates to a 3D scanner system and a handheld intraoral scanning device, configured for providing the feedback signal such as by executing the computer-implemented method.

A system for adjusting the firmness of a substrate configured to support a subject includes a first rod configured to be movable by a mechanism, a second rod parallel to and spaced from the first rod a distance that spans a majority of a dimension of the substrate, and flexible straps extending between the first rod and the second rod and attached to the first rod and the second rod at respective ends of each flexible strap. The mechanism is configured to move the first rod in a first direction to increase tension on the flexible straps and move the first rod in a second direction to decrease tension on the flexible straps. The mechanism can be manually operated by the subject or can be a motor that is controlled by a controller.

Quantitative colorimetric carbon dioxide detection and measurement systems are disclosed. The systems can include a gas conduit, a colorimetric indicator adapted to exhibit a color change in response to exposure to carbon dioxide gas, a temperature controller operatively coupled to the colorimetric indicator and configured to control the temperature of the colorimetric indicator, an electro-optical sensor assembly including a light source or sources adapted to transmit light to the colorimetric indicator, and a photodiode or photodiodes configured to detect light reflected from the colorimetric indicator and to generate a measurement signal, and a processor in communication with the electro-optical sensor assembly. The processor can be configured to receive the measurement signal generated by the electro-optical sensor assembly and to compute a concentration of carbon dioxide based on the measurement signal. Methods for using the systems are also disclosed including providing a breathing therapy to a patient or user.

A method for detecting and quantifying a liquid and/or food and/or medication intake of a user wearing a hearing device which comprises at least one microphone. The method comprises: receiving an audio signal from the at least one microphone and/or a sensor signal from at least one further sensor; and collecting and analyzing the received audio signal and/or further sensor signals so as to detect each time the user drinks and/or takes medication and/or eats something, wherein drinking and/or medication intake is distinguished from eating and/or wherein drinking is distinguished from medication intake, and so as to determine values indicative of how often this is detected and/or a respective amount of liquid and/or food and/or medication ingested by the user.

There is provided a hydration state indicator. The hydration state indicator comprises a watertight shell; a semi-permeable membrane configured to permit the passage of water molecules and to block the passage of molecules of at least one solute; a water-absorbent indicator layer enclosed by the shell and the membrane; and output means configured to provide an output. The water-absorbent indicator layer has a predetermined osmotic strength. The volume of at least one part of the indicator layer is variable in dependence on the water content of the indicator layer. The output is variable in dependence on the volume of the at least one part of the indicator layer.

The present invention describes a system and method for selecting and optimizing a sound stimulus using a deep neural network to regulate and improve human sleep quality. The deep neural network has the capability of characterizing processing of human brain cortical neurons for external stimulus (images, sounds, etc.) information. By inputting massive sound stimuli into the deep neural network, a sound mode which causes model-estimated sleep electroencephalograph to be optimal can be found, the sound mode is applied to a real human body, and the intensity of corresponding sleep waves of the human body in different sleep stages is enhanced through closed-loop optimization so as to realize the purpose of regulating sleep. The present invention mainly aims at solving the technical problem of how to select and optimize, when a sound stimulus means (music, speech, natural sounds, white/colored noise, etc.) is used to assist in human sleep.

A hands-free height measurement system includes a distance sensor configured to generate a signal indicative of a height of a user, a processor, and a memory. The memory includes instructions stored thereon, which when executed by the processor cause the hands-free height measurement system to receive a first signal, by the distance sensor, indicating a distance from the user to the hands-free height measurement system, compare the indicated distance to a stored predetermined distance from a floor to the hands-free height measurement system, and determine a height of the user based on the comparison.

An accelerometer is mounted on a location of a user's body, sports equipment, or other device and tracks movement. Data describing the user's movement(s) may be saved or uploaded for distribution. The user's movement(s) may be compared to previously saved or downloaded movement data and an audio, vibrational, electrical, or other alert may be activated when the movement data is outside a predetermined range from the previously saved, pre-programmed, or downloaded movement. The invention is useful at least in various forms of physical therapy, sports training, and job training, and provides synergy when utilized in conjunction with other motion help related devices.