WO2023103265A1 - 脑电波感应耳机 - Google Patents

脑电波感应耳机 Download PDF

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Publication number
WO2023103265A1
WO2023103265A1 PCT/CN2022/089929 CN2022089929W WO2023103265A1 WO 2023103265 A1 WO2023103265 A1 WO 2023103265A1 CN 2022089929 W CN2022089929 W CN 2022089929W WO 2023103265 A1 WO2023103265 A1 WO 2023103265A1
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WO
WIPO (PCT)
Prior art keywords
noise reduction
circuit
sensing
signal
brainwave
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PCT/CN2022/089929
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English (en)
French (fr)
Inventor
彭信龙
郭世文
杨卉
何桂晓
曹磊
吴海全
Original Assignee
深圳市飞科笛***开发有限公司
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Publication of WO2023103265A1 publication Critical patent/WO2023103265A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G06F3/015—Input arrangements based on nervous system activity detection, e.g. brain waves [EEG] detection, electromyograms [EMG] detection, electrodermal response detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise

Definitions

  • the present application belongs to the technical field of earphones, and in particular relates to an earphone for brain wave induction.
  • Bluetooth headsets on the market that support Bluetooth, noise reduction, heart rate and other functions.
  • Most current Bluetooth headsets require users to manually operate the headset or the terminal communicating with the headset to set the corresponding scene mode or audio data, which is not convenient enough.
  • the purpose of the present application is to provide a brain wave induction earphone, aiming at solving the problem that the current earphone needs manual operation to perform relevant operations, which is not convenient enough.
  • An embodiment of the present application provides a brain wave induction earphone, including:
  • a plurality of sets of sensing electrodes are arranged on the outside of the earphone, and are used to collect brain waves to generate induced electrical signals, wherein each set of sensing electrodes includes at least one sensing electrode;
  • An electroencephalogram processing circuit connected to each of the sensing electrodes, for outputting sensing data after preprocessing the sensing electrical signals;
  • a noise reduction circuit including at least one noise reduction microphone, the noise reduction circuit is used to collect environmental noise to generate a noise reduction signal;
  • control circuit connected to the brainwave processing circuit and the noise reduction circuit, for generating the control signal according to the sensing data provided by the brainwave processing circuit, and for decoding the audio data to obtain The audio signal is synchronously output to the speaker with the noise reduction signal;
  • control signal is used to trigger the terminal communicating with the earphone to set the audio data output to the earphone.
  • the earphone is a headset, and a plurality of the sensing electrodes are respectively arranged on the inner surface of the headband and the inner surface of the ear pad of the headset, so as to be close to the user's head. department.
  • two sets of sensing electrodes are arranged symmetrically on the inner surface of the headband, and at least one set of sensing electrodes are respectively set on the left and right earpads.
  • the communication circuit includes a Bluetooth antenna and an audio interface for transmitting the control signal and the audio data.
  • the communication circuit further includes a Type-C interface for transmitting one or more of charging signals, control signals and audio data.
  • the brain wave processing circuit includes:
  • a plurality of filter circuits are respectively connected to a plurality of the sensing electrodes, and are respectively used to filter and amplify the induction electrical signals generated by the electroencephalogram collected by each of the sensing electrodes;
  • An analog-to-digital converter connected to a plurality of said filter circuits, for performing analog-to-digital conversion on the amplified induced electrical signal to obtain induced data;
  • a controller connected to the analog-to-digital converter and the control circuit, for converting the sensing data into a form suitable for a communication protocol with the control circuit, so as to transmit the sensing data to the Control circuit.
  • control circuit includes a Bluetooth audio chip.
  • control signal includes information indicating the user's mental state and concentration level, so that the terminal outputs matching audio data according to the information.
  • the noise reduction circuit includes a noise reduction chip, the noise reduction chip is connected to the noise reduction microphone, and is used to generate a feed-forward noise reduction signal according to the environmental noise collected by the noise reduction microphone , feedback noise reduction signal or double-feed noise reduction signal.
  • the earphone is a headset
  • the noise reduction microphone is arranged on the outside of the ear shell and/or inside the ear shell of the headset.
  • the embodiment of the present application has at least the following beneficial effects:
  • Brain wave sensing earphones generate control signals by collecting brain waves, and use the control signals to trigger the terminal that communicates with the earphones to set the audio data output to the earphones, so as to realize the function of setting the audio output without manual operation by the user, which is convenient to use .
  • the user's emotional and mental state is monitored, and matching audio data can be provided according to the emotional and mental state to improve user experience.
  • the beneficial effect of the brain wave induction earphone is that: the brain wave induction earphone generates a control signal by collecting brain waves, and uses the control signal to trigger the terminal that communicates with the earphone to set the audio data output to the earphone, so as to realize different
  • the function of setting the audio output requires manual operation by the user, which is convenient to use.
  • the user's emotional and mental state is monitored, and matching audio data can be provided according to the emotional and mental state to improve user experience.
  • Fig. 1 is a schematic structural diagram of the brain wave induction earphone provided by the embodiment of the present application;
  • Fig. 2 is a circuit block diagram of the brain wave induction earphone provided by the embodiment of the present application;
  • Fig. 3 is a block diagram of the brain wave processing circuit in the circuit of the brain wave induction earphone shown in Fig. 2;
  • FIG. 4 is an example circuit diagram of a filter circuit of the electroencephalogram processing circuit shown in FIG. 3 .
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • plurality means two or more, and “several” means one or more, unless otherwise specifically defined.
  • the embodiment of the present application provides a brainwave induction earphone 100, including a speaker 11, a power supply circuit 12, a communication circuit 13, multiple sets of induction electrodes 14, a brainwave processing circuit 15, and a noise reduction circuit 16 and the control circuit 17.
  • a head-mounted smart headset is taken as an example.
  • the power supply circuit 12 is used to supply power to the earphone 100 as a whole.
  • the power supply circuit 12 includes a battery 121, a charging chip 122, a voltage regulator circuit (LDO) or a buck-boost circuit (DC-DC).
  • LDO voltage regulator circuit
  • DC-DC buck-boost circuit
  • the charging chip 122 is used for charging and discharging the battery 121 .
  • the voltage stabilizing circuit or the voltage-boosting circuit is used to stabilize the voltage of the battery 121 or output voltage up/down.
  • the communication circuit 13 is used to transmit charging signals, control signals and audio data; in one embodiment, the communication circuit 13 includes a Bluetooth antenna 131 and an audio interface 132 for transmitting control signals and audio data, which can be connected by a 3.5mm audio cable
  • the terminal can also be connected wirelessly through the Bluetooth antenna 131, which has certain convenience.
  • the communication circuit 13 further includes a Type-C interface 133 for transmitting one or more of charging signals, control signals and audio data.
  • the Type-C interface 133 is generally used for charging, which has the advantage of fast charging.
  • sensing electrodes 14 are arranged outside the earphone 100 for collecting brain waves to generate sensing electrical signals, wherein each group of sensing electrodes 14 includes at least one sensing electrode.
  • the electroencephalogram processing circuit 15 is connected with each group of sensing electrodes 14, and is used for preprocessing the sensing electric signal and outputting sensing data; the preprocessing includes filtering, amplification, analog-to-digital conversion, and protocol matching.
  • the noise reduction circuit 16 includes at least one noise reduction microphone 163.
  • the noise reduction circuit 16 is used to collect environmental noise to generate a noise reduction signal, and can perform active noise reduction.
  • the noise reduction microphone 163 is arranged on the outside of the ear shell and/or the inside of the ear shell to realize the collection of environmental noise; optionally, the sound played by the loudspeaker 11 can also be collected to use To analyze the noise reduction effect, realize noise reduction feedback, and improve user experience.
  • the control circuit 17 is connected with the electroencephalogram processing circuit 15 and the noise reduction circuit 16, and is used to generate a control signal according to the induction data provided by the electroencephalogram processing circuit 15, and is used to decode the audio data to obtain an audio signal and the noise reduction signal to be outputted synchronously to the Speaker 11 ; wherein, the control signal is used to trigger a terminal (not shown) communicating with the earphone 100 to set the audio data output to the earphone 100 . It does not require manual settings by the user and is easy to use.
  • the control circuit 17 is generally built with a Bluetooth audio chip, which constitutes the main control of the earphone 100 and also has functions such as Bluetooth communication, audio decoding, and system control. Synchronously outputting the audio signal and the noise reduction signal to the speaker 11 can cancel out the environmental noise and improve the user experience.
  • the control signal includes information indicating the user's mental state and concentration level, so that the terminal outputs matching audio data according to the information.
  • the control signal includes information indicating the user's mental state and concentration level, so that the terminal outputs matching audio data according to the information.
  • a plurality of sensing electrodes are respectively arranged on the inner surface of the headband 110 and the inner surfaces of the ear pads 103, 104 of the headset, so as to be close to the user's head and improve the accuracy of brain wave signal collection.
  • two sets of sensing electrodes 14 are arranged symmetrically on the inner surface of the headband 110 , and at least one set of sensing electrodes 14 are respectively set on the left and right ear pads 103 , 104 .
  • the sensing electrodes can be directly arranged on the housing.
  • the brain wave processing circuit 15 includes a plurality of filter circuits 151 , an analog-to-digital converter 152 and a controller 153 .
  • a plurality of filter circuits 151 are respectively connected to the plurality of sensing electrodes, and the plurality of filter circuits 151 are respectively used for filtering and amplifying the induction electrical signals generated by the electroencephalogram collected by each sensing electrode.
  • the filter circuit 151 is constructed by using an operational amplifier, and may be implemented by using a discrete device or an integrated chip.
  • the filter circuit 151 can be, for example, a differential amplifier circuit, or a voltage amplifier, a current amplifier, a transconductance amplifier, and a transimpedance amplifier.
  • the filter circuit 151 includes an input protection circuit 1512 connected to the sensing electrode, a high-pass filter 1514 for filtering the DC component of the induced electrical signal, a notch filter 1516 for filtering power frequency interference, And a plurality of amplification circuits 1518 for amplification.
  • the input protection circuit 1512 includes a current-limiting resistor R1, one end of the current-limiting resistor R1 is connected to the sensing electrode, and the other end is connected to the input of the high-pass filter 1514;
  • the high-pass filter 1514 includes a filter capacitor connected in series with the current-limiting resistor R1 at one end C1, and a resistor R2 with one end connected to the other end of the filter capacitor C1 and the other end connected to ground.
  • the amplifying circuit 1518 includes an operational amplifier U1A, a bias resistor R3 and a feedback resistor R4.
  • the non-inverting input terminal of the operational amplifier U1A is connected to the other end of the filter capacitor C1, and the inverting input terminal is connected to the other terminal of the filter capacitor C1, and the inverting input terminal is passed through the bias resistor R4.
  • R3 is grounded, and the feedback resistor R4 is connected between the inverting input terminal and the output of the operational amplifier U1A, and the output of the operational amplifier U1A is used as the output of the amplifying circuit 1518 .
  • the high-pass filter 1514 filters out the DC component of the induced electrical signal, and then connects it to an amplifying circuit 1518 for primary amplification, and then inputs it to the notch filter 1516 to filter out power frequency interference, and then passes through an amplifying circuit 1518 for secondary
  • the secondary amplification is output to the analog-to-digital converter 152 , and the induced signal can be accurately identified by the analog-to-digital converter 152 by filtering out the DC component and power frequency interference and performing secondary amplification.
  • the induced electrical signal output by secondary amplification may be output to the analog-to-digital converter 152 after several times of high/low-pass filtering, so that the analog-to-digital converter 152 can identify the induced electrical signal more accurately.
  • the notch filter 1516 includes a CRC ⁇ -type filter circuit and an RCR-type filter circuit, and the CRC ⁇ -type filter circuit and the RCR-type filter circuit are connected in parallel between the output of the primary amplification circuit 1518 and the input of the secondary amplification circuit 1518,
  • the CRC ⁇ -type filter circuit includes two series-connected filter capacitors C3, C4 and a resistor R7 connected to the series connection node of the two filter capacitors C3, C4 and ground
  • the RCR-type filter circuit includes two series-connected resistors R5, R6 and a filter capacitor C2 connected between the series connection node of the two resistors R5, R6 and ground. Two series-connected filter capacitors C3, C4 and two series-connected resistors R5, R6 are connected in parallel.
  • the filter circuit 151 further includes a limiter circuit 1513 connected to the output side of the high-pass filter 1514 for limiting the amplitude of the induced electrical signal and a protection circuit 1515 for preventing interference (such as static electricity).
  • the limiter circuit 1513 includes two diodes D1, D2, and the two diodes D1, D2 are connected in series between the positive and negative power supply +2V5, -2V5, and the other end of the filter capacitor C1 is connected to the series node of the two diodes D1, D2.
  • the protection circuit 1515 includes a protection capacitor C6, and the protection capacitor C6 is connected between the input of the primary amplifier circuit 1518 and the ground.
  • the controller 153 is connected with the analog-to-digital converter 152 and the control circuit 17 , and is used to convert the sensing data into a form of communication protocol with the control circuit 17 , so as to transmit the sensing data to the control circuit 17 .
  • the controller 153 can use a common microprocessor, such as a single-chip microcomputer, to convert the sensing data into communication protocol data that the control circuit 17 can recognize, so as to improve transmission efficiency and reduce noise interference.
  • the communication protocol can be, for example, Universal Asynchronous Transceiver (Universal Asynchronous Receiver/Transmitter, UART) form.
  • the noise reduction circuit 16 includes a noise reduction chip 161, the noise reduction chip 161 is connected to the noise reduction microphone 163, and is used to generate a feed-forward noise reduction signal and a feedback noise reduction signal according to the environmental noise collected by the noise reduction microphone 163. Noise-reduced signal or dual-feed noise-reduced signal.
  • the earphone 100 is a headset, and the noise reduction microphone 163 is disposed outside the ear shell 101 and/or inside the ear shell 101 of the headset.
  • a noise reduction microphone 163 is provided on the outside of the left ear concha 101 and the inside of the ear concha 101
  • a noise reduction microphone 163 is respectively provided on the outside of the right ear concha 101 and the inside of the ear concha 101 .
  • the ambient noise collected outside the ear shell 101 is used to generate a feed-forward noise reduction signal.
  • the sound collected inside the ear shell 101 is used to generate a feedback noise reduction signal.
  • the brain wave sensing earphone 100 of the present application is a bluetooth earphone, supports active noise reduction function, and supports 3.5mm wired input.
  • the bluetooth chip can be such as CSR8670, and the noise reduction chip 161 can be such as Sony CXD3775.
  • an MFi (Made for iPhone/iPod/iPad) chip is added.
  • the brainwave sensing earphone 100 of the present application has added the function of brainwave detection.
  • the brainwaves collect brainwave signals by contacting different parts of the head through 4 contacts.
  • the brainwave signals are filtered and amplified by the operational amplifier, and then transmitted to the analog-to-digital converter 152 for analog-to-digital conversion. After data processing by the microprocessor Convert it to a differential signal and transmit it to the Bluetooth audio chip.
  • the Bluetooth audio chip passes through the simplified parallel process (Simplified Parallel Process, SPP) protocol to transmit brainwave data to mobile phones or laptops.
  • SPP Simple Parallel Process
  • the brain wave signal is further processed through the APP of the mobile phone or laptop computer to obtain the current state of the user, select appropriate music content to play to the user, improve the user's study and work attention, and improve the efficiency of study or work.

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Abstract

本申请涉及电子电路，提供了一种脑电波感应耳机（100），包括扬声器（11），还包括；多组感应电极（14），设置在所述耳机的外部，用于采集脑电波生成感应电信号，其中每组所述感应电极（14）至少包括一个所述感应电极；脑电波处理电路（15），与各所述感应电极连接，用于对所述感应电信号进行预处理后输出感应数据；控制电路（17），与所述脑电波处理电路（15）连接，用于根据所述脑电波处理电路（15）提供的所述感应数据生成控制信号，以及用于对所述音频数据进行解码得到音频信号与降噪信号同步输出到扬声器（11）；其中，所述控制信号用于触发与所述耳机通讯的终端设置所输出到所述耳机的所述音频数据。方便用户控制耳机，该耳机可以是智能耳机。

Description

脑电波感应耳机
本申请要求于2021年12月07日在中国专利局提交的、申请号为202111484224.0、发明名称为“脑电波感应耳机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于耳机技术领域，尤其涉及一种脑电波感应耳机。
 背景技术
目前市面上有支持蓝牙，降噪，心率等功能的耳机，目前的蓝牙耳机多需要用户对耳机或者与耳机通讯的终端进行手动操作才能设定相应的情景模式或者音频数据，不够方便。
 技术问题
本申请的目的在于提供一种脑电波感应耳机，旨在解决目前的耳机需要手动操作才能进行相关操作，不够方便的问题。
 技术解决方案
本申请实施例采用的技术方案是：
本申请实施例提供了一种脑电波感应耳机，包括：
扬声器；
供电电路，用于给所述耳机供电；
通讯电路，用于传输充电信号、控制信号和音频数据；
多组感应电极，设置在所述耳机的外部，用于采集脑电波生成感应电信号，其中每组所述感应电极至少包括一个所述感应电极；
脑电波处理电路，与各所述感应电极连接，用于对所述感应电信号进行预处理后输出感应数据；
降噪电路，包括至少一个降噪麦克风，所述降噪电路用于采集环境噪声以生成降噪信号；
控制电路，与所述脑电波处理电路和所述降噪电路连接，用于根据所述脑电波处理电路提供的所述感应数据生成所述控制信号，以及用于对所述音频数据进行解码得到音频信号与所述降噪信号同步输出到扬声器；
其中，所述控制信号用于触发与所述耳机通讯的终端设置所输出到所述耳机的所述音频数据。
在其中一个实施例中，所述耳机为头戴式耳机，多个所述感应电极分别设置在所述头戴式耳机的头带内侧表面以及耳垫的内表面，以用于贴近用户的头部。
在其中一个实施例中，所述头带内侧表面设有两组对称设置的所述感应电极，左右两个所述耳垫分别设置有至少一组所述感应电极。
在其中一个实施例中，所述通讯电路包括用于传输所述控制信号和所述音频数据的蓝牙天线以及音频接口。
在其中一个实施例中，所述通讯电路还包括用于传输充电信号、控制信号和音频数据中的一项或多项的Type-C接口。
在其中一个实施例中，所述脑电波处理电路包括：
多个滤波电路，分别与多个所述感应电极连接，分别用于对各个所述感应电极采集脑电波生成的感应电信号进行滤波放大；
模数转换器，与多个所述滤波电路连接，用于对放大后的感应电信号进行模数转换得到感应数据；
控制器，与所述模数转换器和所述控制电路连接，用于将所述感应数据转换为适配与所述控制电路之间的通讯协议的形式，以传输所述感应数据给所述控制电路。
在其中一个实施例中，所述控制电路包括蓝牙音频芯片。
在其中一个实施例中，所述控制信号包括指示用户精神状态和注意力集中程度的信息，以使所述终端根据所述信息输出匹配的音频数据。
在其中一个实施例中，所述降噪电路包括降噪芯片，所述降噪芯片与所述降噪麦克风连接，用于根据所述降噪麦克风采集的环境噪声对生成前馈式降噪信号、反馈式降噪信号或双馈式降噪信号。
在其中一个实施例中，所述耳机为头戴式耳机，所述降噪麦克风设置在所述头戴式耳机耳壳外侧和/或耳壳内侧。
本申请实施例相比现有技术至少存在以下有益效果：
脑电波感应耳机通过采集脑电波生成控制信号，并利用该控制信号触发与耳机通讯的终端设置所输出到耳机的音频数据，以实现不需要用户手动操作就能设定音频输出的功能，使用方便。用户的情绪和精神状态监控，并能够根据情绪和精神状态提供匹配的音频数据以提升用户体验。
 有益效果
本申请实施例提供的脑电波感应耳机的有益效果在于：脑电波感应耳机通过采集脑电波生成控制信号，并利用该控制信号触发与耳机通讯的终端设置所输出到耳机的音频数据，以实现不需要用户手动操作就能设定音频输出的功能，使用方便。用户的情绪和精神状态监控，并能够根据情绪和精神状态提供匹配的音频数据以提升用户体验。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请实施例提供的脑电波感应耳机结构示意图；
图2为本申请实施例提供的脑电波感应耳机的电路模块图；
图3为图2所示的脑电波感应耳机的电路中脑电波处理电路的模块图；
图4为图3所示的脑电波处理电路的滤波电路的示例电路图。
 本发明的实施方式
为了使本申请所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，“若干个”的含义是一个或多个，除非另有明确具体的限定。
请参阅图1和图2，本申请实施例的提供了一种脑电波感应耳机100，包括扬声器11、供电电路12、通讯电路13、多组感应电极14、脑电波处理电路15、降噪电路16以及控制电路17。本申请中，以头戴式智能耳机为例。
扬声器11为两个，分别设置在两个耳壳101、102内；供电电路12用于给耳机100整体供电。一般地，供电电路12包括电池121、充电芯片122以及稳压电路（LDO）或升降压电路（DC-DC），本申请中，电池121为两块，提升续航，并且将两块电池121分别设置在两个耳壳101、102内，利用配重平衡。充电芯片122用于对电池121进行充放电。稳压电路或升降压电路用于将电池121的电压稳压或者升/降压输出。
通讯电路13用于传输充电信号、控制信号和音频数据；在一个实施例中，通讯电路13包括用于传输控制信号和音频数据的蓝牙天线131以及音频接口132，既可以通过 3.5mm 音频线连接终端，也可以通过蓝牙天线131无线连接，具备一定的便捷性。
可选地，通讯电路13还包括用于传输充电信号、控制信号和音频数据中的一项或多项的Type-C接口133。具体实现时，Type-C接口133一般用于充电，其具有充电快的优点。
多组感应电极14设置在耳机100的外部，用于采集脑电波生成感应电信号，其中每组感应电极14至少包括一个感应电极。
脑电波处理电路15与各组感应电极14连接，用于对感应电信号进行预处理后输出感应数据；该预处理包括滤波、放大、模数转换以及协议匹配等。
降噪电路16包括至少一个降噪麦克风163，降噪电路16用于采集环境噪声以生成降噪信号，能够进行有源噪声消除。耳机100为头戴式耳机时，降噪麦克风163设置在头戴式耳机耳壳外侧和/或耳壳内侧，以实现环境噪声的采集；可选地，还可以采集扬声器11播放的声音，用以分析降噪效果，实现降噪反馈，提升用户体验。
控制电路17与脑电波处理电路15和降噪电路16连接，用于根据脑电波处理电路15提供的感应数据生成控制信号，以及用于对音频数据进行解码得到音频信号与降噪信号同步输出到扬声器11；其中，控制信号用于触发与耳机100通讯的终端（未图示）设置所输出到耳机100的音频数据。不需要用户手动设置，使用方便。控制电路17一般采用蓝牙音频芯片搭建，构成耳机100的主控，同时兼具蓝牙通讯、音频解码、***控制等功能。将音频信号与降噪信号同步输出到扬声器11，可以抵消掉环境噪声，提升用户体验。
具体实现时，控制信号包括指示用户精神状态和注意力集中程度的信息，以使终端根据信息输出匹配的音频数据。实现情绪、精神状态和注意力集中程度的监控，并能够根据情绪和精神状态提供匹配的音频数据以提升用户体验。能够根据控制信号判断出你是否情绪正常，是否注意力集中。当你精神焦虑或者注意力不集中的时候，它会通过在耳机100中的声音提示，告诉你应该注意精力。比如，一旦用户出现注意力不集中的情况，终端则推送类似铃铛的「叮当」声响起，来告诉用户分心了。
在其中一个实施例中，多个感应电极分别设置在头戴式耳机的头带110内侧表面以及耳垫103、104的内表面，以用于贴近用户的头部，提高脑电波信号的采集精准。可选地，头带110内侧表面设有两组对称设置的感应电极14，左右两个耳垫103、104分别设置有至少一组感应电极14。
在其他实施例中，比如是入耳式耳机，那么感应电极可以直接设置在外壳上。
请参阅图3和图4，在其中一个实施例中，脑电波处理电路15包括多个滤波电路151、模数转换器152以及控制器153。
多个滤波电路151分别与多个感应电极连接，多个滤波电路151分别用于对各个感应电极采集脑电波生成的感应电信号进行滤波放大。
一般地，滤波电路151采用运算放大器进行搭建，可以采用分立器件或者集成芯片实现。滤波电路151比如可以是差分放大电路，或者是电压放大器、电流放大器、互导放大器和互阻放大器。
在一个实施例中，滤波电路151包括连接到感应电极的输入保护电路1512、用于滤除感应电信号的直流分量的高通滤波器1514、用于滤除工频干扰的陷波滤波器1516、和多个用于放大的放大电路1518。
其中，输入保护电路1512包括一个限流电阻R1，限流电阻R1的一端连接感应电极，另一端连接到高通滤波器1514的输入；高通滤波器1514包括一个一端与限流电阻R1串联的滤波电容C1，以及一端与滤波电容C1另一端连接，另一端连接到地的电阻R2。
以其中一个放大电路1518为例，放大电路1518包括运算放大器U1A、偏置电阻R3和反馈电阻R4，运算放大器U1A 的正相输入端连接滤波电容C1的另一端，反相输入端通过偏置电阻R3接地，反馈电阻R4连接在运算放大器U1A的反相输入端和输出之间，运算放大器U1A的输出作为放大电路1518的输出。
其中，高通滤波器1514对感应电信号滤除直流分量后接入到一个放大电路1518进行一次放大，再输入到陷波滤波器1516以滤除工频干扰，后在经过一个放大电路1518进行二次放大输出到模数转换器152，通过滤除直流分量和工频干扰，并进行二次放大，使得感应信号能够被模数转换器152准确识别。
可选地，二次放大输出的感应电信号还可以经过若干次高    /低通滤波后再输出到模数转换器152，以使得模数转换器152识别感应电信号更加精准。
可选地，陷波滤波器1516包括CRCπ型滤波电路和RCR型滤波电路，CRCπ型滤波电路和RCR型滤波电路并联连接到一次放大电路1518的输出和二次放大电路1518的输入之间的，其中CRCπ型滤波电路包括两个串联连接的滤波电容C3,C4和一个连接到两个滤波电容C3,C4的串联连接节点和地之间的电阻R7，RCR型滤波电路包括两个串联连接的电阻R5,R6和一个连接到两个电阻R5,R6的串联连接节点和地之间的滤波电容C2。两个串联连接的滤波电容C3,C4和两个串联连接的电阻R5,R6并联。
可选地，滤波电路151还包连接到高通滤波器1514输出侧的，用于限制感应电信号的幅值的限幅电路1513和用于防止干扰（比如静电）的防护电路1515。限幅电路1513包括两个二极管D1,D2，两个二极管D1,D2串联连接在正负电源+2V5,-2V5之间，滤波电容C1另一端连接到两个二极管D1,D2的串联节点，用于使经过滤波电容C1另一端的感应电信号的幅值限制在正负电源+2V5,-2V5提供的正负电压（+2.5V,-2.5V）之间。防护电路1515包括保护电容C6，保护电容C6连接在一次放大电路1518的输入和地之间。
控制器153与模数转换器152和控制电路17连接，用于将感应数据转换为适配与控制电路17之间的通讯协议的形式，以传输感应数据给控制电路17。控制器153可以采用普通微处理器，比如单片机等，将感应数据转换成控制电路17能识别的通讯协议数据，以提高传输效率，降低噪声干扰。该通讯协议比如可以是通用异步收发传输器（Universal Asynchronous Receiver/Transmitter，UART）形式。
在其中一个实施例中，降噪电路16包括降噪芯片161，降噪芯片161与降噪麦克风163连接，用于根据降噪麦克风163采集的环境噪声对生成前馈式降噪信号、反馈式降噪信号或双馈式降噪信号。可选地，耳机100为头戴式耳机，降噪麦克风163设置在头戴式耳机的耳壳101外侧和/或耳壳101内侧。比如，左侧的耳壳101外侧和耳壳101内侧分别设置一个降噪麦克风163，右侧的耳壳101外侧和耳壳101内侧分别设置一个降噪麦克风163。耳壳101外侧所收集的环境噪声用于生成前馈式降噪信号。耳壳101内侧所收集声音用于生成反馈式降噪信号。
在一个示例中，本申请的脑电波感应耳机100属于蓝牙耳机，支持主动降噪功能，支持3.5mm有线输入。蓝牙芯片可以采用比如CSR8670，降噪芯片161可以采用比如Sony CXD3775。为方便匹配苹果手机升级耳机100的软件，增加了MFi（Made for iPhone/iPod/iPad）芯片。
本申请的脑电波感应耳机100增加了脑电波检测的功能。脑电波通过4个触点接触头部的不同部位来采集脑电波信号，脑电波信号通过运放做滤波和信号放大，传输到模数转换器152做模数转换，微处理器做数据处理后转为差分信号传输给蓝牙音频芯片。
蓝牙音频芯片通过简并行过程（Simplified Parallel Process，SPP）协议把脑电波数据传输到手机或笔记本电脑上。通过手机或笔记本电脑的APP进一步处理脑电波信号，获取用户的当前状态，选择适当的音乐内容播放给用户，提高用户学习和工作的注意力，改善学习或工作的效率。
以上所述实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种脑电波感应耳机，包括扬声器，其特征在于，还包括；
    供电电路，用于给所述耳机供电；
    通讯电路，用于传输充电信号、控制信号和音频数据；
    多组感应电极，设置在所述耳机的外部，用于采集脑电波生成感应电信号，其中每组所述感应电极至少包括一个所述感应电极；
    脑电波处理电路，与各所述感应电极连接，用于对所述感应电信号进行预处理后输出感应数据；
    降噪电路，包括至少一个降噪麦克风，所述降噪电路用于采集环境噪声以生成降噪信号；
    控制电路，与所述脑电波处理电路和所述降噪电路连接，用于根据所述脑电波处理电路提供的所述感应数据生成所述控制信号，以及用于对所述音频数据进行解码得到音频信号与所述降噪信号同步输出到扬声器；
    其中，所述控制信号用于触发与所述耳机通讯的终端设置所输出到所述耳机的所述音频数据。
  2. 如权利要求1所述的脑电波感应耳机，其特征在于，所述耳机为头戴式耳机，多个所述感应电极分别设置在所述头戴式耳机的头带内侧表面以及耳垫的内表面，以用于贴近用户的头部。
  3. 如权利要求2所述的脑电波感应耳机，其特征在于，所述头带内侧表面设有两组对称设置的所述感应电极，左右两个所述耳垫分别设置有至少一组所述感应电极。
  4. 如权利要求1所述的脑电波感应耳机，其特征在于，所述通讯电路包括用于传输所述控制信号和所述音频数据的蓝牙天线以及音频接口。
  5. 如权利要求4所述的脑电波感应耳机，其特征在于，所述通讯电路还包括用于传输充电信号、控制信号和音频数据中的一项或多项的Type-C接口。
  6. 如权利要求1至5任一项所述的脑电波感应耳机，其特征在于，所述脑电波处理电路包括：
    多个滤波电路，分别与多个所述感应电极连接，分别用于对各个所述感应电极采集脑电波生成的感应电信号进行滤波放大；
    模数转换器，与多个所述滤波电路连接，用于对放大后的感应电信号进行模数转换得到感应数据；
    控制器，与所述模数转换器和所述控制电路连接，用于将所述感应数据转换为适配与所述控制电路之间的通讯协议的形式，以传输所述感应数据给所述控制电路。
  7. 如权利要求1至5任一项所述的脑电波感应耳机，其特征在于，所述控制电路包括蓝牙音频芯片。
  8. 如权利要求1至5任一项所述的脑电波感应耳机，其特征在于，所述控制信号包括指示用户精神状态和注意力集中程度的信息，以使所述终端根据所述信息输出匹配的音频数据。
  9. 如权利要求1至5任一项所述的脑电波感应耳机，其特征在于，所述降噪电路包括降噪芯片，所述降噪芯片与所述降噪麦克风连接，用于根据所述降噪麦克风采集的环境噪声对生成前馈式降噪信号、反馈式降噪信号或双馈式降噪信号。
  10. 如权利要求9所述的脑电波感应耳机，其特征在于，所述耳机为头戴式耳机，所述降噪麦克风设置在所述头戴式耳机耳壳外侧和/或耳壳内侧。
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CN104902391A (zh) * 2015-05-21 2015-09-09 成都腾悦科技有限公司 一种脑电波感应蓝牙耳机
CN210431813U (zh) * 2019-10-28 2020-04-28 深圳市魅动智能股份有限公司 一种无线蓝牙主动降噪电路及无线蓝牙耳机
CN114222218A (zh) * 2021-12-07 2022-03-22 深圳市飞科笛***开发有限公司 脑电波感应耳机

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