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Consumer Sleep Technology
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Patent US10695528
Issued 2020-06-30
Device And Method For Stimulating Slow Brain Waves
The invention relates to a self-contained device (1) for stimulating slow brain waves, capable of being worn by a person (P), in particular during a period of time when said person is sleeping. The device (1) comprises a supporting element (2), capable of surrounding the head of a person, and on which electrodes (3) are mounted in contact with the person in order to acquire a measurement signal that represents a physiological electrical signal of the person; an acoustic transducer (4) for emitting an acoustic signal (A) stimulating the inner ear of the person; and on-board conditioning and control electronics (5) for, in flexible real time, receiving the measurement signal and controlling the emission of an acoustic signal (A) synchronised with a predefined slow brain wave time pattern.
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- 1. A device, configured to be worn by a person, for stimulating slow brain waves, the device comprising:
a supporting member, configured to partially surround a head of a person so as to be held thereon, the supporting member having mounted thereon: a plurality of electrodes, configured to be in contact with the person to capture one measurement signal representative of a physiological electrical signal of said person, one acoustic transducer that emits an acoustic signal stimulating an inner ear of said person, and embedded conditioning and control electronics that, in soft real-time, receive the measurement signal from the plurality of electrodes and control the emission by the acoustic transducer of the acoustic signal synchronized with a predefined slow brain wave temporal pattern, wherein said embedded conditioning and control electronics are configured to, in soft real-time and with the supporting member of the device partially surrounding the head of the person: capture the one measurement signal representative of the physiological electrical signal of the person, by means of the plurality of electrodes in contact with skin of the person; receive said measurement signal by the embedded conditioning and control electronics; and emit, via the acoustic transducer controlled by the embedded conditioning and control electronics, the acoustic signal synchronized with the predefined slow brain wave temporal pattern, wherein the embedded conditioning and control electronics, for emitting the acoustic signal via the acoustic transducer, are configured to: determine, from the measurement signal, a slow brain wave temporal waveform, determine, from said slow brain wave temporal waveform, one temporal moment of synchronization between the predefined slow brain wave temporal pattern and a predefined temporal pattern of the acoustic signal, and control the acoustic transducer to emit the predefined temporal pattern of the acoustic signal at said temporal moment of synchronization, and wherein, for determining said slow brain wave temporal waveform from said measurement signal, the embedded conditioning and control electronics are configured to: determine a temporal waveform oscillating at an average slow brain wave frequency of the person, determine an instantaneous phase difference between said temporal waveform and the measurement signal, and adjust an instantaneous phase of said temporal waveform according to an instantaneous phase of the measurement signal, based on said instantaneous phase difference.
- 23. A method for stimulating slow brain waves of a person, wherein the person wears a device for stimulating slow brain waves and that is configured to be worn by the person, the device being comprised of a supporting member configured to partially surround the head of the person so as to be held thereon, and the device having mounted thereon:
a plurality of electrodes configured to be in contact with the person to capture one measurement signal that represents a physiological electrical signal of the person, one acoustic transducer that emits an acoustic signal stimulating an inner ear of the person, and embedded conditioning and control electronics that, in soft real-time, receives the measurement signal from the plurality of electrodes and controls the emission by the acoustic transducer of said acoustic signal synchronized with a predefined slow brain wave temporal pattern, the method comprising, in soft real-time and with the supporting member of the device partially surrounding the head of the person: capturing the one measurement signal that represents the physiological electrical signal of the person, by means of the plurality of electrodes in contact with skin of the person; receiving said measurement signal by the embedded conditioning and control electronics; and emitting, by the acoustic transducer, when so controlled by the embedded conditioning and control electronics, the acoustic signal synchronized with the predefined slow brain wave temporal pattern, wherein the emitting of the acoustic signal synchronized with the predefined slow brain wave temporal pattern includes steps carried out by the embedded conditioning and control electronics of: determination of a slow brain wave temporal waveform from the measurement signal, determination, from said slow brain wave temporal waveform, of one temporal moment of synchronization between the predefined slow brain wave temporal pattern and a predefined temporal pattern of the acoustic signal, and controlling of the acoustic transducer to emit the predefined temporal pattern of the acoustic signal at said temporal moment of synchronization, and wherein the determination of said slow brain wave temporal waveform comprises: determination of a temporal waveform oscillating at an average slow brain wave frequency of the person, determination of an instantaneous phase difference between said temporal waveform and the measurement signal, and adjustment of an instantaneous phase of said temporal waveform according to an instantaneous phase of the measurement signal, based on said instantaneous phase difference.
