A media-playback device acquires a heart rate, selects a song with a first tempo, and initiates playback of the song. The song meets a set of qualification criteria and the first tempo is based on the heart rate, such as being equal to or less than the heart rate. The media-playback device also initiates playback of a binaural beat at a first frequency. Over a period of time, the binaural beat's first frequency is changed to a second frequency. Over the period of time, the first tempo can also be changed to a second tempo, where the second tempo is slower than the first tempo.

A media-playback device acquires a heart rate, selects a song with a first tempo, and initiates playback of the song. The song meets a set of qualification criteria and the first tempo is based on the heart rate, such as being equal to or less than the heart rate. The media-playback device also initiates playback of a binaural beat at a first frequency. Over a period of time, the binaural beat's first frequency is changed to a second frequency. Over the period of time, the first tempo can also be changed to a second tempo, where the second tempo is slower than the first tempo.

Systems, computer-implemented methods and/or computer program products that facilitate real-time response to defined symptoms are provided. In one embodiment, a computer-implemented method comprises: monitoring, by a system operatively coupled to a processor, a state of an entity; detecting, by the system, defined symptoms of the entity by analyzing the state of the entity; and transmitting, by the system, a signal that causes audio response or a haptic response to be provided to the entity, wherein transmission of the signal that causes the audio response or the haptic response is based on detection of the defined symptoms.

A device for producing sensory stimuli for a child by means of a body made of an elastic material and a bellows which is embedded in the elastic material of the body, including a first converter device for generating a fluid flow for moving a lying surface for a child, a second converter device for generating sound in a fluid, which corresponds at least to either heart sounds or human speech or music, and a fluid line for simultaneously conducting the fluid flow generated by the first converter device and transmitting the sound generated by the second converter device to a bellows in a body made of an elastic material.

A media-playback device acquires a heart rate, selects a song with a first tempo, and initiates playback of the song. The song meets a set of qualification criteria and the first tempo is based on the heart rate, such as being equal to or less than the heart rate. The media-playback device also initiates playback of a binaural beat at a first frequency. Over a period of time, the binaural beat's first frequency is changed to a second frequency. Over the period of time, the first tempo can also be changed to a second tempo, where the second tempo is slower than the first tempo.

A sleep-inducing device, including: 1) a probe including a heart rate sensor detecting a heart rate of an infant's mother; 2) a sampling module collecting data with regard to the heart rate detected by the probe; 3) a first microcontroller unit (MCU) calculating the data transmitted from the sampling module and outputting a heart rate signal; 4) a second microcontroller unit (MCU) receiving and processing the heart rate signal transmitted from the first MCU; 5) a keyboard inputting, controlling and adjusting parameters of the second MCU; 6) a display displaying an operation/control state of the device; 7) a loudspeaker playing audio data of the heart rate signal processed by and transmitted from the second MCU; 8) a first memory storing the audio data of the heart rate signal; 9) a low dropout regulator (LDO) providing a constant voltage to the second MCU; and 10) a power supply.

Communication of parent physiological data to an infant may include a first interface device which includes a sensor to record physiological data associated with a heartbeat of a parent, a processor to receive the physiological data from the sensor, and a transceiver; a server which receives the physiological data from the transceiver, accesses an instance of the physiological data from a replay storage location during a loss of communication, assigns a unique identifier, processes the physiological data, modifies the physiological data to be within an allowable threshold or accesses physiological data within the allowable threshold when the physiological data is outside an allowable threshold, filters the physiological data to apply an effect, and transmits the physiological data based on the unique identifier; and a second interface device which includes a transceiver to receive the physiological data and a communication element to communicate the physiological data to the infant.

A method for inducing an activity of a user's autonomic nervous system is provided. The method includes steps of: (a) on condition that each of the user's reference heart rate information corresponding to each of active states of the user's autonomic nervous system is obtained, an inducing device, if a specific active state of the autonomic nervous system is selected by the user, acquiring first reference heart rate information of the user corresponding to the specific active state of the autonomic nervous system; and (b) the inducing device supporting a first vibration stimulus with a first period corresponding to the first reference heart rate information to be applied to the user, to thereby allow the user's real-time average cardiac interval to be synchronized with the first vibration stimulus.

An intrauterine simulation system may comprise a motion-control system and/or a maternal heartbeat simulator. The motion-control system may be configured to move a platform supporting an infant in a pattern characteristic of the movement of a woman in a late stage of pregnancy, thereby simulating movement experienced by a fetus in the intrauterine environment. The maternal heartbeat simulator may be configured to produce low-frequency sound waves and/or vibrations and to transmit the sound waves and/or vibrations via the platform to the infant's body. This simulates the vibrations created by the mother's heart as experienced by a fetus. The platform supporting the infant may be incorporated into a bassinet, cradle, mattress, and/or other suitable device. A system controller may be configured to gradually reduce aspects of the simulation, such as the intensity of the sound waves and/or vibrations or extent of the movement, thereby transitioning an infant to the extrauterine environment.

Sensory outputs are synchronized to input tempos for providing soothing and other effects for children and other persons. In example embodiments, juvenile products such as rockers and swings have motors that are controlled to produce an oscillatory motion with an adaptive tempo that is synchronized to rhythmic inputs such as a parent's heartbeat. In other example embodiments, juvenile products such as music players are controlled to output signals to play songs via speakers with an adaptive tempo that is synchronized to rhythmic inputs such as an infant's respiratory rate.