KR20110014254A - Electroencephalogram frequency tuning apparatus and method using reversed way of ultrasonic frequency demodulation characteristic of sound propagation boundary condition between human skin and skull, and doze driving protection apparatus using these - Google Patents

Abstract

PURPOSE: A device and a method for tuning brain wave and a sleep driving prevention device using the same are provided, which enable a user to freely do other activities using visual sensation, auditory sense, and tactile sensation. CONSTITUTION: A device for tuning brain wave comprises: a brain wave tuning signal generating unit(10) generating a brain wave tuning signal with frequency and waveform for tuning the brain wave of the human; a carrier signal generating unit(30) which generates a carrier wave with frequency and waveform which is attenuated so that the brain wave tuning signal can be demodulated; a brain wave carrier signal modulator(20) which modulates a brain wave tuning signal and a carrier wave; a brain wave tuning signal output unit(40).

Description

Electroencephalography and method using reverse frequency ultrasonic wave detection characteristics according to sound wave transmission boundary condition between scalp and skull CONDITION BETWEEN HUMAN SKIN AND SKULL, AND DOZE DRIVING PROTECTION APPARATUS USING THESE}

The present invention relates to an electroencephalogram device and method, and to a drowsiness operation prevention device using the same, and more particularly, ultrasonic waves according to sound wave transmission boundary conditions between the scalp and the skull without transmitting and synchronizing the electroencephalogram signals to visual, auditory, or tactile senses. By using the frequency detection feature inversely, the brain-modulated echocardiogram is directly delivered to the head so that the brain wave can be tuned so that the user can freely do other activities using the visual, auditory, or tactile sense during the brain wave tuning. EEG device and method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary condition between the scalp and the skull, and by using this to prevent drowsiness without providing driving obstacles to the driver to induce safe driving Drowsiness driving prevention device using the EEG All.

In general, EEG refers to the flow of electricity generated when the cranial nerve signal is transmitted. These brain waves are delta waves, which are very slow when you sleep, beta waves, which are fast when you are active, and alpha waves, which are medium speeds when you meditate.

In particular, the interest in the alpha wave is increasing, beta wave is mainly appeared when the mind and body are tense, theta wave and delta wave is well shown when the health is not good, whereas the alpha wave is relatively close to the mental activity with eyes closed and relaxed This is because it is said to be a good brain wave that occurs when there is little thought in mind.

Meanwhile, British scientist Gray Walter discovered that brain waves synchronize in response to the flashing light and sound frequencies in the late 1940s and guides human brain waves to external stimulation based on the "Electromagnetic Wave Theory". Therefore, a variety of brain wave tuning methods have been proposed to help learning, sleep, and activity.

First, there is a method of synchronizing brain waves by using light glasses or optical glasses to blink or change the amount of light at the brain wave frequency to be synchronized using optical glasses or optical glasses. In addition, in the brain wave tuning method using sound, the brain wave frequency to be tuned is not recognized by the hearing because the frequency is less than 20Hz that is not recognized by human hearing or the frequency is very low 50Hz or less. Generates sound waves with a certain amplitude in the audible frequency band according to the period of the EEG frequency to be tuned to be recognized as an auditory sound, or has the same waveform and amplitude in the right ear and left ear of a human, There are ways to use the binaural beats that are heard.

Here, the method using the binaural beat phenomenon is that when the sound frequency heard through the right ear and the sound frequency heard through the left ear are different, the brain recognizes the frequency calculated by the difference between the two frequencies. It is a method of synchronizing the EEG by making the EEG frequency to be made into the difference of the sound frequency to be heard by the right ear and the left ear.

Another method of EEG tuning is to transmit an EEG frequency vibration to be tuned through the pillow vibration to the skull to synchronize the EEG.

Looking specifically at the EEG-induced signal generator that has been proposed recently, EEG-induced signal generators to introduce the effects of learning aid and mental concentration by inducing the alpha and theta waves as described above, such EEG-induced signal generation A device is a device that continuously stimulates the brain using light or sound so that brain waves can be induced and maintained in a specific frequency region.

The EEG-induced signal generator is a microcomputer (or memory device) that is embedded in a device main body and outputs corresponding frequency data of brain waves (α wave, β wave, δ wave or θ wave) for each type, and according to the data transmitted from the micom. A sound generating unit for supplying sound to the headphone and a light generating unit for supplying a light emitting signal according to the data transmitted from the microcomputer to the glasses.

In the conventional EEG generators configured as described above, when the user's mental concentration or mental relaxation mode is input to the microcomputer, the microcomputer applies the frequency according to the selection mode to the sound generator and the light generator, respectively. The sound generating unit generates sound signals from the frequency applied from the microcomputer and outputs them to the headphones, and the light generating unit generates a light emitting signal having a flashing period suitable for the frequency applied from the microcomputer and applies the light signal to the light emitting device attached inside the optical glasses. , EEG can also promote mental concentration or mental relaxation of the user by the sound and light.

However, in the conventional EEG signal generator, since there is a considerable time for a separate EEG induction before the start of learning in order to induce EEG, there is a inconvenience in use that should have a double EEG induction time and learning time, If learning is progressed for a long time, there is a problem in that the high concentration of the brain wave guided before the start of learning cannot be maintained continuously. Furthermore, the EEG guide signals used in the above devices generate signals by combining with the sound source in the audible frequency range in order to maximize the concentration without the user feeling bored. In order not to be bored by being exposed to the movement of the problem, there is a problem in that a variety of programs that can separately provide a combination of the EEG and other sound sources in the audible frequency region is required.

In the end, as described above, in the EEG method, the EEG cannot be used for other activities other than EEG, while the EEG can be used after the EEG. There is a fundamental problem with the EEG method that other activities cannot be performed during the test. In addition, the brain wave tuning method using a pillow has a problem that other productive activities cannot be performed during the brain wave tuning because it is necessary to maintain the posture of cutting the pillow during the brain wave tuning.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electroencephalogram device and method that can directly synchronize the brain waves by outputting the EEG signal without using visual or auditory means. In other words, there is an object of providing an EEG apparatus and method for synchronizing EEG by transmitting EEG signal to the brain through visual or auditory, and transmitting EEG signal to modulated wave directly to the brain.

In addition, an object of the present invention is to provide a drowsy driving prevention device that can generate an active brain wave so that the driver does not drowsy driving while driving using the EEG device and method.

The brain wave tuning device using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull according to the present invention includes a frequency for tuning at least one of human brain waves, delta wave, theta wave, alpha wave, and beta wave. By using the characteristic that the ultrasound wave detection signal generation unit 10 for generating a brain wave tuning signal having a waveform and the sound wave medium between the human scalp and the skull are ultrasonic waves detected and the envelope of the ultrasound is transmitted to the brain. A carrier signal generator 30 for generating a carrier having a frequency and a waveform in which acoustic impedance is attenuated so that the brain wave signal is demodulated while passing through the scalp and the skull junction surface of a human body having different acoustic impedances, and the brain wave signal generator 10 EEG signal generated by modulating the carrier wave generated by the EEG signal and the carrier signal generator 30 The modulator 20 and the modulated EEG signal output unit 40 for amplifying and outputting the signal modulated by the EEG carrier signal modulator 20 is characterized in that it comprises a.

At this time, the amplitude modulated EEG storage and reproducing unit capable of storing in advance the signal modulated by the EEG carrier signal modulator 20 and outputting the modulated signal to the modulated EEG signal output unit 40, the EEG signal generator ( 10) and the carrier signal generator 30 and the brain wave carrier signal modulator 20 may be configured.

In addition, the EEG signal generation unit 10 is composed of a memory device capable of storing and outputting the EEG signal in advance or a microprocessor for generating the EEG signal, the carrier signal generator 30 Carrier generated through the 40KHz ~ 60KHz, the EEG carrier signal modulator 20, the carrier wave generated through the carrier signal generator 30 and the EEG wave generated by the EEG signal generator 10 It is preferable to perform amplitude modulation or single-side band amplitude modulation using the tuned signal as a modulated wave.

On the other hand, the brain wave tuning method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull according to the present invention, for tuning at least one of human brain waves delta wave, theta wave, alpha wave, beta wave In the EEG method, an EEG signal for tuning at least one of the EEG signals is a modulated signal, and a frequency that is attenuated so that the EEG signal is demodulated while passing through the interface of the human scalp and skull having different acoustic impedances. And a generation step of generating a carrier wave having a waveform, a modulation step of modulating the brain wave tuning signal and a carrier wave, and an output step of amplifying and outputting the modulated signal.

On the other hand, the drowsiness driving prevention device using the brain wave tuning device according to the present invention, the drowsiness to prevent the drowsiness of the driver to drive the charrang by tuning at least one of human brain waves delta wave, theta wave, alpha wave, beta wave In the driving prevention device, the apparatus includes a brain wave tuning signal transmitter 12 mounted on one side of the front surface of the vehicle to synchronize at least one of the driver's brain waves, wherein the brain wave tuning signal transmitter 12 is The EEG signal is generated while passing the EEG signal generation unit 10 for generating an EEG signal having a frequency and waveform for tuning at least one of the EEG of the driver, and the scalp and skull joint surface of the human body having different acoustic impedances. A carrier signal generator 30 for generating a carrier wave having a frequency and a waveform which are attenuated so as to be demodulated, and the brain wave modulation signal generation EEG signal modulation unit 20 for modulating the EEG signal generated by the unit 10 and the carrier wave generated by the carrier signal generator 30 and the EEG carrier signal modulator 20 It characterized in that it comprises a modulated EEG signal output unit 40 for amplifying and outputting the signal.

As described above, according to the present invention, unlike the conventional brain wave tuning method using visual to auditory sense and tactile sense, the user does not use visual or auditory sense and sense of touch so that the user can conveniently perform other activities even during brain wave tuning. And it is effective to maximize the recognition and utilization of the device. In other words, because the brain waves are delivered without the use of sight, hearing, or tactile sensations, the brain waves are transmitted in a non-contact manner, which makes it possible to use visual, auditory, or tactile sensations during other productive activities.

In addition, the effect of providing an effective and improved drowsiness driving prevention device because it does not include an element that hinders driving by inducing an electroencephalogram that prevents drowsiness in a non-contact manner without using the driver's vision, hearing, and touch in preventing drowsiness. There is.

1 is a schematic configuration diagram of an EEG apparatus using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary condition between the scalp and the skull according to the present invention;
Figure 2 is a flow chart of the brain wave tuning method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull according to the present invention,
3a to 3d is a general electroencephalogram,
4 is a schematic configuration diagram of a drowsy driving prevention device using a brain wave control device according to an embodiment of the present invention,
5a to 5d is a device and measurement graph for simulating the brain wave tuning device and method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the electroencephalogram device and method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull and the drowsiness operation prevention device using the same in detail.

Figure 1 is a schematic configuration diagram of the EEG apparatus using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary condition between the scalp and the skull according to the present invention, Figure 2 is a sound wave transmission boundary between the scalp and skull according to the present invention 3 is a flow chart of the EEG method using the ultrasonic frequency detection characteristics according to the conditions, and FIGS. 3A to 3D are general EEG waveforms.

In addition, Figure 4 is a schematic configuration diagram of the drowsiness operation prevention device using the brain wave control device according to an embodiment of the present invention, Figure 5a to 5d is a sound wave transmission boundary condition between the scalp and skull according to the present invention An apparatus and measurement graph for simulating the EEG apparatus and method using the ultrasonic frequency detection feature inversely.

In adding the reference numerals to the components of the drawings, the same components are to have the same reference numerals as possible even if displayed on different drawings, and known functions that are determined to unnecessarily obscure the subject matter of the present invention Detailed description of the configuration will be omitted. Also, directional terms such as 'top', 'bottom', 'front', 'back', 'tip', 'front', 'back' and the like are used in connection with the orientation of the disclosed figure (s). Since the components of the embodiments of the present invention may be positioned in various orientations, the directional terminology is used for the purpose of illustration and not limitation.

As shown in FIG. 1, an EEG apparatus using an ultrasonic frequency detection characteristic according to sound wave transmission boundary conditions between a scalp and a skull according to a preferred embodiment of the present invention has a frequency and a waveform for tuning human brain waves. A brain wave tuning signal generator 10 for generating an electroencephalogram signal, and a carrier wave having a frequency and a waveform in which ultrasonic components are attenuated to demodulate the brain wave tuning signal while passing through the scalp and skull interface of a human body having different directivity and acoustic impedances. Carrier signal generator 30 for generating a signal, the brain wave signal generated by the brain wave signal generator 10 and the brain wave signal generated by the carrier signal generator 30 modulates the carrier wave signal modulator And a modulated EEG signal output unit 40 for amplifying and outputting the signal modulated by the EEG carrier signal modulator 20. It is.

The EEG signal generation unit 10 is configured as a memory device capable of storing and outputting an EEG signal in advance, or a microprocessor for generating the EEG signal, for example, an alpha wave or theta wave. Can be.

The carrier signal generator 30 analyzes the head demodulation phenomenon and generates a carrier sound signal in which the carrier is demodulated by head demodulation. When the human head is sonically interpreted, the scalp has an acoustic impedance of 1.5 [10 ⁶ Raly] and the skull has an acoustic impedance of 6 [10 ⁶ Raly]. Ultrasonic components in the 40KHz ~ 60KHz band is not attenuated. The carrier signal generator 30 according to the present invention generates a carrier having a frequency and a waveform that are attenuated at the interface between the scalp and the skull as described above.

The EEG carrier signal modulator 20 modulates or modulates an EEG signal generated by the EEG signal generator 10 on a carrier wave generated by the carrier signal generator 30. The wave amplitude modulation is performed. Here, since the modulation process is already known, a detailed description thereof will be omitted.

On the other hand, the present invention may be configured as an amplitude modulated EEG storage and reproducing unit capable of pre-store and output the signal modulated by the EEG carrier signal modulator 20. In other words, the modulated signal is stored and modulated in advance so that the functions of the EEG signal generator 10, the carrier signal generator 30, and the EEG carrier signal modulator 20 may be integrally performed. It is possible to further reduce the production cost of the product by configuring the present invention to be output to the brain wave tuning signal output unit 40 can be produced by the simpler and more cost-saving.

With reference to FIG. 2, an ultrasound wave tuning method using the characteristics of the ultrasonic wave detected as the interface property of the sound medium between the scalp and the skull according to the present invention and the induced EEG, which is the envelope of the ultrasonic wave, is transmitted to the brain will be described.

As is well known, human brain waves increase the EEG of the delta (δ) wave of 2Hz ~ 3.99Hz band during sleep, and increase the EEG of theta (θ) wave of 4Hz ~ 7.99Hz band of drowsiness, During relaxation or meditation, the EEG wave of the alpha (α) wave ranges from 8 Hz to 12.99 Hz, and the EEG wave of the beta (β) wave ranges from 13 Hz to 30 Hz in an excited or nervous state, and 30 Hz during extreme arousal and excitement. EEG of gamma (γ) waves in the ˜50 Hz band is increased. In other words, theta waves appear in the transition from emotional consciousness or sleep to the state of inner consciousness, and in the state of creativeness, hyperlearning, and relaxation. The alpha wave is an internal state of consciousness, and is increased when it is mentally stable and relaxed, such as relaxation, peace of mind, physical and mental relaxation. In addition, the beta wave appears when waking in consciousness, speaking, performing all conscious activities and predominantly in anxiety or tension. In particular, it is deeply related to the five senses. The gamma wave is in a state of consciousness, and appears when solving a sports game or a difficult math problem that causes the hand to sweat. Therefore, it is desirable to induce a lot of alpha waves to release stress and relieve tension.

By using the characteristic that the ultrasound wave is detected and the envelope of the ultrasound is transmitted to the brain by the interface between the brain wave tuning signal for tuning the alpha wave or theta wave and the sound wave medium between the scalp and the skull for carrying the brain wave return signal. When the brain reaches the brain, the ultrasonic component is attenuated to the detection level and generates a carrier wave of the ultrasonic component to transmit the brain wave to be induced to the envelope of the ultrasonic component (S10).

Thereafter, the brain wave modulation signal, which is a modulated signal, is modulated by the carrier wave (S12), and the modulated brain wave modulation signal is amplified and output (S14).

The modulated EEG signal is radiated to the head of the human body in a non-contact manner by the ultrasonic modulation wave, the EEG carrier carrying the modulated signal is attenuated to the level of the ultrasonic component detected in the process of passing through the scalp and skull boundary (S16), After the ultrasound component is attenuated to the detected level, the EEG signal, which is an ultra-enveloped envelope that carries the EEG signal left over, is transmitted through the skull to the bone oscillation to non-body and unconsciously synchronize the EEG (S18, S20).

On the other hand, although the EEG is not shown in Figure 2, for convenience of the user to add the convenience of use or to show the operation state by voice or text or LED (LED) through a voice function or a visual function, EEG You can additionally configure buttons or volume to control the synchro operation.

EEG nonlinear detection characteristics of the EEG method using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull according to the present invention as shown in Fig. 5a the acoustic impedance close to the scalp and skull A simulation apparatus having an acoustic boundary condition close to the acoustic boundary condition between the skulls and a material having the same was confirmed, and the experimental results are the same as those of FIGS. 5A to 5D, and the simulation apparatus is illustrated in FIGS. 5A to 5D. It demonstrates with reference to.

In this simulation, the ceramic plate (35), which is a magnetic tile having a width of 20 cm, a height of 20 cm, and a thickness of 7 mm, can be easily obtained with an acoustic impedance close to the skull of acoustic impedance 6 [10 ⁶ Raly] to test the EEG nonlinear detection characteristics. Was used in correspondence with the skull, and the silicone 33, which is easily obtainable while having an acoustic impedance close to the scalp having an acoustic impedance of 1.5 [10 ⁶ Raly], was applied to the ceramic plate 35 with a thickness of 5 mm and hardened. The acoustic impedance boundary condition corresponding to the acoustic impedance boundary condition of the interface between the scalp and the skull was used as a substitute for the skin, and the silicon 33 was coated by being spaced apart from the ceramic plate 35 to which the silicon 33 was applied. A brain wave tuning signal transmitter 12 is disposed on the ceramic plate 35 to transmit the modulated brain wave tuning signal. Meanwhile, an ultrasonic receiver 36 is mounted on a rear surface of the ceramic plate 35 bonded to the silicon 33 to receive sound waves transmitted through the silicon 33 and the ceramic plate 35.

The EEG 12, which outputs the modulated EEG signals, modulated and transmitted the EEG frequencies with ultrasonic waves in the 40 KHz to 60 KHz band.

5B is a fast Fourier transform graph of sound waves received from the back of the ceramic plate 35 with the silicon 33 removed, and FIG. 5C is a fast Fourier transform graph of sound waves received from the back of the ceramic plate 35. 5D is a graph of a transfer function in which silicon 33 is attached to the ceramic plate 35 represented by the difference between FIGS. 5B and 5C.

As a result of the simulation, the transfer function graph in which the silicon 33 is attached to the ceramic plate 35 shown in FIG. 5D shows that the acoustic impedance between the scalp and the skull is different from the perspective of the sound wave conducting medium. It shows that it has a low pass nonlinear transfer function for high frequency sound waves, and if it is used inversely and sends the brain waves to the ultrasonic waves, the ultrasonic waves are detected from the head and only the EEG signals can be delivered to the brain to synchronize the brain waves. I could confirm that.

On the other hand, in this experiment, the ultrasonic medical device output was performed within 720mW / cm ² / hour, which allows the use of the human body, and less than 3mW / cm ² , which is the maximum effective acoustic intensity (allowed for human use).

In addition, the EEG apparatus that reverses the ultrasonic frequency detection characteristics according to the sound wave transmission boundary condition between the scalp and the skull can be effectively applied to the drowsiness driving prevention device. In other words, it is possible to induce an active brain wave to the vehicle driver to prevent drowsiness.

Figure 4 is a schematic configuration of the drowsiness operation prevention device according to an embodiment of the present invention, the brain wave tuning device is built using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull of the present invention The EEG signal transmission device 12 is configured to be mounted inside the vehicle. Here, the EEG 12 is preferably installed on the steering wheel, the dashboard or the driver's ceiling close to the driver's head.

The mounted EEG 12 transmits a modulated signal 25 to the head of the driver, and the ultrasonic component of the output modulated signal 25 forms an interface between the scalp 32 and the skull 34. The brain wave tuning signal 24, which is attenuated while passing through and is enveloped in the modulated signal 25, is bone-conducted through the skull 34 and transmitted to the brain, causing the brain wave tuning.

There are various methods to detect drowsiness using EEG, EMG, EKG, EEG, etc. These methods provide high accuracy in the judgment of driver's drowsiness. . In particular, the method using the EEG is used as an appropriate factor to determine the drowsiness of the driver.

As described above, delta waves, theta waves, alpha waves, and beta waves are generated in the human brain, and although there is a difference in the amount of each wave according to a person, accurate drowsiness detection is difficult only by the presence or absence of the delta waves or theta waves. In addition, even in the case of drowsiness with delta waves and theta waves, in areas where drowsiness can cause fatal problems (e.g. vehicle driving, occupational safety), drowsiness is detected lately and no appropriate action can be taken to cause serious events. There is a problem that can be. Accordingly, the drowsiness driving prevention device according to the present invention can effectively transmit a continuously modulated signal 25 without disturbing driving while inducing an active EEG which effectively prevents drowsiness to the driver.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention if it is obvious to those skilled in the art.

10: brain wave signal generating unit 12: brain wave signal transmitting device
20: carrier signal modulator 22: carrier wave
24: tuning signal 25: modulated signal
30: modulated signal generator 32: scalp
33: silicon 34: skull
35: ceramic plate 40: modulated EEG signal output unit

Claims (5)

EEG signal generation unit 10 for generating an EEG signal having a frequency and waveform for tuning at least one of human brain waves delta wave, theta wave, alpha wave, and beta wave, and sound wave between human scalp and skull Ultrasonic waves are detected by different media characteristics and ultrasonic envelopes are transmitted to the brain. The frequencies and waveforms are attenuated to demodulate the EEG signals as they pass through the scalp and cranial junction of the human body with different acoustic impedances. Carrier signal generation unit 30 for generating a carrier wave having, and the EEG signal generated by the brain wave tuning signal generator 10 and the EEG carrier signal for modulating the carrier wave generated through the carrier signal generator 30 The modulator 20 and a modulated EEG signal output unit 40 for amplifying and outputting the signal modulated by the EEG carrier signal modulator 20 are included. To a brain wave tuning device yeokyiyong ultrasonic frequency detection characteristic of the sound wave passing the boundary conditions between the scalp and skull, characterized in that configuration.
The method of claim 1,
An amplitude modulated EEG storage and reproducing unit capable of storing the modulated signal in advance through the EEG transfer signal modulator 20 and outputting the modulated signal to the modulated EEG modulator signal output unit 40. And an ultrasonic frequency detection device using the ultrasonic frequency detection characteristic according to the sound wave transmission boundary condition between the scalp and the skull, characterized in that it is configured in place of the carrier signal generator 30 and the EEG carrier signal modulator 20.
3. The method according to claim 1 or 2,
The EEG signal generation unit 10 is composed of a memory device capable of storing and outputting the EEG signal in advance or a microprocessor for generating the EEG signal,
Carrier generated by the carrier signal generation unit 30 is 40KHz ~ 60KHz,
The EEG carrier signal modulator 20 modulates or modulates the carrier wave generated by the carrier signal generator 30 and the EEG signal generated by the EEG signal generator 10 as a modulated wave. EEG apparatus using the ultrasonic frequency detection characteristics according to the sound wave transmission boundary conditions between the scalp and the skull, characterized in that the amplitude amplitude modulation.
In the brain wave tuning method for tuning at least one of human brain waves delta wave, theta wave, alpha wave, beta wave,
Generate a carrier wave having a frequency and a waveform that is attenuated so that the brain wave modulation signal is demodulated while passing through the interface of the scalp and skull of humans having different acoustic impedances as a modulated signal for tuning at least one of the brain waves. Generating step,
A modulation step of modulating the brain wave tuning signal and a carrier wave;
And a step for amplifying and outputting the modulated signal, wherein the EEG method utilizes ultrasonic frequency detection characteristics according to sound wave transmission boundary conditions between the scalp and the skull.
In the drowsiness driving prevention device for preventing the drowsiness of the driver driving the car by tuning at least one of the human brain waves delta wave, theta wave, alpha wave, beta wave,
Is mounted on one side of the front of the inside of the vehicle includes a brain wave tuning signal transmission device 12 for tuning at least one of the brain waves of the driver,
The brain wave tuning signal transmitter 12 includes a brain wave tuning signal generator 10 for generating a brain wave tuning signal having a frequency and a waveform for tuning at least one of the driver's brain waves, and a scalp of a human body having different acoustic impedances. And a carrier signal generator 30 for generating a carrier wave having a frequency and a waveform which is attenuated so that the brain wave tuning signal is demodulated while passing through the cranial junction surface, and the brain wave tuning signal generated by the brain wave tuning signal generator 10. And an EEG carrier signal modulator 20 for modulating a carrier wave generated by the carrier signal generator 30, and a modulated brain wave tuning signal for amplifying and outputting a signal modulated by the EEG carrier signal modulator 20. Drowsiness operation prevention device using an electroencephalography device characterized in that it comprises an output unit 40.

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