CN211406257U - Bass sound transmission circuit based on bone conduction sound transmission device - Google Patents
Bass sound transmission circuit based on bone conduction sound transmission device Download PDFInfo
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- CN211406257U CN211406257U CN202020599255.5U CN202020599255U CN211406257U CN 211406257 U CN211406257 U CN 211406257U CN 202020599255 U CN202020599255 U CN 202020599255U CN 211406257 U CN211406257 U CN 211406257U
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Abstract
The utility model relates to a bass sound transmission circuit based on a bone conduction sound transmission device, which comprises a plurality of bone conduction vibrators and a plurality of loudspeakers; when the Bluetooth device is used, the Bluetooth microcontroller is in wireless Bluetooth connection with the mobile terminal, receives an audio signal and a control instruction sent by the mobile terminal, and sends the audio signal and a feedback instruction to the mobile terminal; after receiving the audio signal, the Bluetooth microcontroller divides the audio signal into a low-frequency band audio signal, a middle-frequency band audio signal and a high-frequency band audio signal according to the frequency of the audio signal, controls a power amplifier chip to amplify the power of the low-frequency band audio signal or the middle-frequency band audio signal and plays the audio signal through a loudspeaker, and controls a bone conduction oscillator to play the high-frequency band audio signal or the middle-frequency band audio signal in a mechanical vibration mode; the bone conduction microphone has the advantages of realizing simple circuit, low cost, small volume and high intelligent degree, making up the defect that the traditional bone conduction microphone cannot transmit heavy bass sound, and further improving user experience.
Description
Technical Field
The utility model relates to a bone conduction earphone technical field, more specifically say, relate to a heavy bass transaudient circuit based on bone conduction transaudient device.
Background
The existing bone conduction sound transmission device, such as a bone conduction earphone, can generate distortion, serious insufficient bass or vibration and the like when carrying out sound transmission with heavy bass; the user experience is poor, and the use requirements of people cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide a circuit simply, small because osteoacusis transaudient device's heavy bass transaudient circuit.
The utility model provides a technical scheme that its technical problem adopted is:
constructing a subwoofer sound transmission circuit based on a bone conduction sound transmission device, wherein the subwoofer sound transmission circuit comprises a plurality of bone conduction vibrators and a plurality of loudspeakers; wherein the content of the first and second substances,
further comprising: the system comprises a Bluetooth microcontroller, a plurality of digital microphones, a plurality of analog microphones, a photoelectric wearing detection sensor, a storage chip, a voice processor and a power amplifier chip;
the Bluetooth microcontroller is used for carrying out wireless Bluetooth connection with the mobile terminal, receiving an audio signal and a control instruction sent by the mobile terminal and sending the audio signal and a feedback instruction to the mobile terminal;
the power amplifier chip is respectively connected with the loudspeaker and the Bluetooth microcontroller;
the voice processor is connected with the Bluetooth microcontroller, and the storage chip and the plurality of digital microphones are connected with the voice processor;
the photoelectric wearing detection sensor is connected with the Bluetooth microcontroller; and the plurality of analog microphones are also connected with the Bluetooth microcontroller.
The utility model discloses a heavy bass transaudient circuit based on bone conduction transaudient device, wherein, a plurality of said bone conduction vibrators include first bone conduction vibrator and second bone conduction vibrator;
an AUDIO _ HPL _ P/SPKL _ P end of the Bluetooth microcontroller is connected with a first end of the first bone conduction oscillator, and an AUDIO _ HPL _ N/SPKL _ N end of the Bluetooth microcontroller is connected with a second end of the first bone conduction oscillator; an AUDIO _ HPR _ N/SPKR _ N end of the Bluetooth microcontroller is connected with a first end of the second bone conduction oscillator, and an AUDIO _ HPR _ P/SPKR _ P end of the Bluetooth microcontroller is connected with a second end of the second bone conduction oscillator.
The utility model discloses a bass transaudient circuit based on bone conduction transaudient device, wherein, the INR + end of power amplifier chip is connected with first electric capacity, the negative pole of first electric capacity with the INR + end of power amplifier chip is connected and the positive pole with bluetooth microcontroller's SPK _ RP end is connected;
the INR-end of the power amplifier chip is connected with a second capacitor, the negative electrode of the second capacitor is connected with the INR-end of the power amplifier chip, and the positive electrode of the second capacitor is connected with the SPK _ RN end of the Bluetooth microcontroller;
the INL-end of the power amplifier chip is connected with a third capacitor, the negative electrode of the third capacitor is connected with the INL-end of the power amplifier chip, and the positive electrode of the third capacitor is connected with the SPK _ LN end of the Bluetooth microcontroller;
the INL + end of the power amplifier chip is connected with a fourth capacitor, the negative electrode of the fourth capacitor is connected with the INL + end of the power amplifier chip, and the positive electrode of the fourth capacitor is connected with the SPK _ LP end of the Bluetooth microcontroller;
the SDR end of the power amplifier chip is connected with the SDL end and is also connected with a first pull-up resistor and a pull-down resistor, the other end of the first pull-up resistor is connected with the anode of a power supply, and the other end of the pull-down resistor is connected with the cathode of the power supply and is grounded; the SDR end of the power amplifier chip is also connected with the GPIO22 end of the Bluetooth microcontroller;
the plurality of speakers includes a first speaker and a second speaker;
the OUL + end of the power amplifier chip is connected with the first end of the first loudspeaker, and the OUT-end of the power amplifier chip is connected with the second end of the first loudspeaker;
the OUR + end of the power amplifier chip is connected with the first end of the second loudspeaker, and the OUR-end of the power amplifier chip is connected with the second end of the second loudspeaker.
The utility model discloses a heavy bass transaudient circuit based on bone conduction transaudient device, wherein, IO _16 end and the GPIO27 end connection and IO _17 end and the GPIO24 end connection of bluetooth microcontroller of speech processor;
the IO _19 end of the voice processor is connected with the GPIO25 end of the Bluetooth microcontroller, and the IO _20 end is connected with the GPIO26 end of the Bluetooth microcontroller;
the CS end of the storage chip is connected with the IO _39 end of the speech processor, the SO end of the storage chip is connected with the IO _36 end of the speech processor, the CCLK end of the storage chip is connected with the IO _34 end of the speech processor, and the SI/SIO0 end of the storage chip is connected with the IO _38 end of the speech processor;
DATA terminals of a plurality of digital microphones are connected with an IO _28 terminal of the speech processor, and CLK terminals are connected with an IO _8 terminal of the speech processor.
The utility model discloses a heavy bass transaudient circuit based on bone conduction transaudient device, wherein, VCC end and + IR end that the detection sensor was worn to photoelectricity all with bluetooth microcontroller's VCCIO end is connected and-IR 1 end is connected with bluetooth microcontroller's GPIO28 end; and the VOUT end of the photoelectric wearing detection sensor is connected with the GPIO21 end of the Bluetooth microcontroller.
The utility model discloses a heavy bass transaudient circuit based on bone conduction transaudient device, wherein, a plurality of said analog microphone include first analog microphone and second analog microphone;
the VDD ends of the first analog microphone and the second analog microphone are connected with the MIC _ BIAS2 end of the Bluetooth microcontroller; the OUTPUT end of the first analog microphone is connected with a fifth capacitor, and the other end of the fifth capacitor is connected with the MIC _ LP end of the Bluetooth microcontroller; and the OUTPUT end of the second analog microphone is connected with a sixth capacitor, and the other end of the sixth capacitor is connected with the MIC _ RP end of the Bluetooth microcontroller.
The beneficial effects of the utility model reside in that: when the Bluetooth device is used, the Bluetooth microcontroller is in wireless Bluetooth connection with the mobile terminal, receives an audio signal and a control instruction sent by the mobile terminal, and sends the audio signal and a feedback instruction to the mobile terminal; after receiving the audio signal, the Bluetooth microcontroller divides the audio signal into a low-frequency band audio signal, a middle-frequency band audio signal and a high-frequency band audio signal according to the frequency of the audio signal, controls a power amplifier chip to amplify the power of the low-frequency band audio signal or the middle-frequency band audio signal and plays the audio signal through a loudspeaker, and controls a bone conduction oscillator to play the high-frequency band audio signal or the middle-frequency band audio signal in a mechanical vibration mode; the storage chip is used for storing audio files, is in wireless connection with the mobile terminal through the Bluetooth microcontroller and realizes data exchange with the mobile terminal; the control instruction comprises volume +, volume-, previous song switching, next song switching, playing, pausing and the like, the Bluetooth microcontroller executes corresponding operation after receiving the corresponding control instruction, and the Bluetooth microcontroller sends a feedback instruction corresponding to the control instruction to the mobile terminal after executing the control instruction; the analog microphone and the digital microphone are also used for matching to pick up an audio signal, and the picked-up audio signal is subjected to echo cancellation by the bluetooth microcontroller and then sent to the mobile terminal, for example: functions such as conversation and recording; the Bluetooth microcontroller controls the audio signal to be played through the loudspeaker and performs noise suppression processing on the audio signal before the audio signal is played in a mechanical vibration mode through the bone conduction vibrator; whether the bone conduction sound transmission device is worn on a human body or not is detected through a photoelectric wearing detection sensor, wearing state information detected by the photoelectric wearing sensor is returned to the mobile terminal in real time, and the Bluetooth microcontroller controls the loudspeaker and the bone conduction vibrator to play or pause according to the wearing state information; the bone conduction microphone has the advantages of realizing simple circuit, low cost, small volume and high intelligent degree, making up the defect that the traditional bone conduction microphone cannot transmit heavy bass sound, and further improving user experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a partial circuit diagram of a bluetooth microcontroller based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 2 is a circuit diagram of another part of the bluetooth microcontroller based on the subwoofer sound transmission circuit of the bone conduction sound transmission device according to the first preferred embodiment of the present invention;
fig. 3 is a circuit diagram of a first bone conduction vibrator of a subwoofer sound transmission circuit based on a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 4 is a circuit diagram of a second bone conduction vibrator of a subwoofer sound transmission circuit based on a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 5 is a circuit diagram of a power amplifier chip of a subwoofer sound transmission circuit based on a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 6 is a circuit diagram of a memory chip of a subwoofer sound transmission circuit based on a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 7 is a circuit diagram of a digital microphone based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 8 is a circuit diagram of a speech processor based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 9 is a circuit diagram of a photoelectric wearable detection sensor based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 10 is a circuit diagram of a first analog microphone based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 11 is a circuit diagram of a second analog microphone based on a subwoofer sound transmission circuit of a bone conduction sound transmission device according to a first preferred embodiment of the present invention;
fig. 12 is a flowchart of an implementation of a subwoofer sound transmission method based on a bone conduction sound transmission device according to a second embodiment of the present invention;
fig. 13 is a flowchart of an implementation of echo cancellation of a bone conduction acoustic transmission apparatus according to a third embodiment of the present invention;
fig. 14 is a flowchart of implementation of voice control of the bone conduction acoustic transmission device according to the fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 shows a subwoofer sound transmission circuit based on a bone conduction sound transmission device according to a first preferred embodiment of the present invention, and fig. 2 to 11 are also shown; comprises a plurality of bone conduction vibrators and a plurality of loudspeakers; wherein the content of the first and second substances,
further comprising: a Bluetooth microcontroller U1, a plurality of digital microphones MIC3, a plurality of analog microphones (not shown in the figure), a photoelectric wearing detection sensor U10, a storage chip U2, a voice processor U5 and a power amplifier chip U7;
the Bluetooth microcontroller U1 is used for performing wireless Bluetooth connection with the mobile terminal, receiving an audio signal and a control instruction sent by the mobile terminal, and sending the audio signal and a feedback instruction to the mobile terminal;
the power amplifier chip U7 is respectively connected with the loudspeaker and the Bluetooth microcontroller U1;
the voice processor U5 is connected with the Bluetooth microcontroller U1, and the storage chip U2 and the plurality of digital microphones MIC3 are connected with the voice processor U5;
the photoelectric wearing detection sensor U10 is connected with the Bluetooth microcontroller U1; the plurality of analog microphones are also connected with the Bluetooth microcontroller U1;
when the Bluetooth microcontroller U1 is in use, the Bluetooth microcontroller U1 is in wireless Bluetooth connection with the mobile terminal, receives an audio signal and a control instruction sent by the mobile terminal, and sends the audio signal and a feedback instruction to the mobile terminal; the Bluetooth microcontroller U1 divides the audio signal into a low-frequency band audio signal, a middle-frequency band audio signal and a high-frequency band audio signal according to the frequency of the audio signal after receiving the audio signal, controls the power amplifier chip U7 to amplify the power of the low-frequency band audio signal or the middle-frequency band audio signal and play the audio signal through a loudspeaker, and controls the bone conduction vibrator to play the high-frequency band audio signal or the middle-frequency band audio signal in a mechanical vibration mode; the storage chip U2 is used for storing audio files and is in wireless connection with the mobile terminal through the Bluetooth microcontroller U1 to realize data exchange with the mobile terminal; the control instruction comprises volume +, volume-, previous song switching, next song switching, playing, pausing and the like, the Bluetooth microcontroller U1 executes corresponding operation after receiving the corresponding control instruction, and the Bluetooth microcontroller U1 sends a feedback instruction corresponding to the control instruction to the mobile terminal after executing the control instruction; an analog microphone is also used to cooperate with a digital microphone MIC3 to pick up an audio signal and send the voice signal to the mobile terminal after echo cancellation of the picked-up audio signal by the bluetooth microcontroller U1, for example: functions such as conversation and recording; the Bluetooth microcontroller U1 controls the audio signal playing through the loudspeaker and carries out noise suppression processing on the audio signal before the audio signal playing is carried out through the bone conduction vibrator in a mechanical vibration mode; whether the bone conduction sound transmission device is worn on a human body is detected through a photoelectric wearing detection sensor U10, wearing state information detected by the photoelectric wearing sensor is returned to the mobile terminal in real time, and the Bluetooth microcontroller U1 controls a loudspeaker and a bone conduction vibrator to play or pause according to the wearing state information; the bone conduction microphone has the advantages of realizing simple circuit, low cost, small volume and high intelligent degree, making up the defect that the traditional bone conduction microphone cannot transmit heavy bass sound, and further improving user experience.
As shown in fig. 1 to 4, the plurality of bone conduction transducers include a first bone conduction transducer SPK1 and a second bone conduction transducer SPK 2;
an AUDIO _ HPL _ P/SPKL _ P end of the Bluetooth microcontroller U1 is connected with a first end of the first bone conduction vibrator SPK1 and an AUDIO _ HPL _ N/SPKL _ N end is connected with a second end of the first bone conduction vibrator SPK 1; the AUDIO _ HPR _ N/SPKR _ N end of the Bluetooth microcontroller U1 is connected with the first end of the second bone conduction vibrator SPK2, and the AUDIO _ HPR _ P/SPKR _ P end is connected with the second end of the second bone conduction vibrator SPK 2; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1, 2 and 5, an INR + end of the power amplifier chip U7 is connected with a first capacitor C60, a negative electrode of the first capacitor C60 is connected with the INR + end of the power amplifier chip U7, and a positive electrode thereof is connected with an SPK _ RP end of the bluetooth microcontroller U1;
the INR-end of the power amplifier chip U7 is connected with a second capacitor C61, the negative electrode of the second capacitor C61 is connected with the INR-end of the power amplifier chip U7, and the positive electrode of the second capacitor C61 is connected with the SPK _ RN end of the Bluetooth microcontroller U1;
the INL-end of the power amplifier chip U7 is connected with a third capacitor C62, the negative electrode of the third capacitor C62 is connected with the INL-end of the power amplifier chip U7, and the positive electrode of the third capacitor C62 is connected with the SPK _ LN end of the Bluetooth microcontroller U1;
the INL + end of the power amplifier chip U7 is connected with a fourth capacitor C63, the negative electrode of the fourth capacitor C63 is connected with the INL + end of the power amplifier chip U7, and the positive electrode of the fourth capacitor C63 is connected with the SPK _ LP end of the Bluetooth microcontroller U1; the capacitor is used for coupling to filter out direct current, remove noise generated by the direct current and provide tone quality;
the SDR end of the power amplifier chip U7 is connected with the SDL end and is also connected with a pull-up resistor R9 and a pull-down resistor R6, the other end of the pull-up resistor R9 is connected with the anode of a power supply, and the other end of the pull-down resistor R6 is connected with the cathode of the power supply and is grounded; the SDR end of the power amplifier chip U7 is also connected with the GPIO22 end of the Bluetooth microcontroller U1; so as to meet the use requirement of the power amplifier chip U7;
the plurality of speakers includes a first speaker (not shown) and a second speaker (not shown);
the OUL + end of the power amplifier chip U7 is connected with the first end of the first loudspeaker, and the OUT-end is connected with the second end of the first loudspeaker;
the OUR + end of the power amplifier chip U7 is connected with the first end of the second loudspeaker, and the OUR-end is connected with the second end of the second loudspeaker; the power amplification chip U7 is used for carrying out power amplification on the audio signal, and the circuit is simple, low in cost and small in size.
As shown in fig. 1 and 2 and fig. 6 to 8, the IO _16 terminal of the speech processor U5 is connected to the GPIO27 terminal of the bluetooth microcontroller U1, and the IO _17 terminal is connected to the GPIO24 terminal of the bluetooth microcontroller U1;
the IO _19 end of the voice processor U5 is connected with the GPIO25 end of the Bluetooth microcontroller U1, and the IO _20 end is connected with the GPIO26 end of the Bluetooth microcontroller U1;
the CS end of the storage chip U2 is connected with the IO _39 end of the speech processor U5, the SO end is connected with the IO _36 end of the speech processor U5, the CCLK end of the storage chip U2 is connected with the IO _34 end of the speech processor U5, and the SI/SIO0 end is connected with the IO _38 end of the speech processor U5;
DATA ends of a plurality of digital microphones MIC3 are all connected with an IO _28 end of a voice processor U5, and CLK ends are all connected with an IO _8 end of a voice processor U5; wherein a plurality of digital microphones MIC3 are used to achieve picking up sound from different angles, improving the user experience.
As shown in fig. 1 and fig. 2 and fig. 9, the VCC terminal and the + IR terminal of the optoelectronic wear detection sensor U10 are both connected to the VCCIO terminal of the bluetooth microcontroller U1, and the-IR 1 terminal is connected to the GPIO28 terminal of the bluetooth microcontroller U1; the VOUT end of the photoelectric wearing detection sensor U10 is connected with the GPIO21 end of the Bluetooth microcontroller U1; photoelectric wearable sensors are used to increase the degree of intelligence.
As shown in fig. 1, 2 and 10, and 11, the plurality of analog microphones includes a first analog microphone MIC1 and a second analog microphone MIC 2;
VDD ends of the first analog microphone MIC1 and the second analog microphone MIC2 are connected with an MIC _ BIAS2 end of the Bluetooth microcontroller U1; the OUTPUT end of the first analog microphone MIC1 is connected with a fifth capacitor C175, and the other end of the fifth capacitor C175 is connected with the MIC _ LP end of the Bluetooth microcontroller U1; the OUTPUT end of the second analog microphone MIC2 is connected with a sixth capacitor C27, and the other end of the sixth capacitor C27 is connected with the MIC _ RP end of the Bluetooth microcontroller U1; the analog microphone and the digital microphone are matched to pick up sound to make up the defects of the analog microphone and the digital microphone, the fidelity of the sound is improved, and the circuit is simple, low in cost and small in size.
Example two:
fig. 12 shows a flow of implementing the subwoofer sound transmission method based on the bone conduction sound transmission device according to the second embodiment of the present invention, and for convenience of description, only the parts related to the second embodiment of the present invention are shown, and the details are as follows:
the bone conduction vibrator and the loudspeaker are included;
in step S101: receiving a first audio electrical signal;
in an embodiment of the invention: the received first audio electric signal comes from a wireless communication circuit (for example, a first audio electric signal transmitted by a Bluetooth communication circuit or a WiFi communication circuit) of the mobile terminal, wherein the first audio electric signal can be an analog signal or a digital signal, preferably a digital signal is used, interference is reduced, and the data transmission rate is high.
In an embodiment of the invention: the bone conduction vibrator is used for correspondingly converting the first audio electric signal into an audio signal in a mechanical vibration mode; the loudspeaker is used for correspondingly converting the first audio electric signal into an audio signal; the loudspeaker is used for overcoming the defect that the bone conduction vibrator cannot realize the sound transmission of the bass sound; when the received first audio electric signal is a digital signal, digital-to-analog conversion is needed to meet the use requirements of the bone conduction vibrator and the loudspeaker on analog signals.
In step S102: dividing the first audio electrical signal into a low-frequency-band audio electrical signal, a medium-frequency-band audio electrical signal and a high-frequency-band audio electrical signal according to the frequency of the first audio electrical signal;
in an embodiment of the invention: before the dividing the first audio electric signal into the low frequency band audio electric signal and the middle frequency band audio electric signal and the high frequency band audio electric signal according to the frequency magnitude of the first audio electric signal, the method further comprises: presetting frequency range of low-frequency band audio electric signals, medium-frequency band audio electric signals and high-frequency band audio electric signals; to with the high pitch in the first audio frequency electric signal, the medium pitch, the bass part is separated out and is supplied bone conduction vibrating plate and speaker to carry out the transaudient respectively, promptly: the bass part is played by a loudspeaker to ensure the fidelity of the bass part and make up the defects of a bone conduction vibrator, the mediant part is freely selected by a user to be transmitted by the loudspeaker or the bone conduction vibrator, and the default mediant part is transmitted by a bone conduction loudspeaker; wherein the frequency range of the low-band audio electrical signal is set to 40Hz-100Hz, the frequency range of the mid-band audio electrical signal is set to 100Hz-300Hz, and the frequency range of the high-band audio electrical signal is set to 300Hz-20000Hz by default.
In step S103: controlling a loudspeaker to correspondingly convert the low-frequency band audio electric signal or the medium-frequency band audio electric signal into an audio signal, and controlling a bone conduction vibrator to correspondingly convert the high-frequency band audio electric signal or the medium-frequency band audio electric signal into an audio signal in a mechanical vibration form;
in an embodiment of the invention: the loudspeaker is used for correspondingly converting the low-frequency band audio electric signal or the medium-frequency band audio electric signal into an audio signal to be played for the ears to listen to, so that the sound transmission at the bass is realized; the bone conduction vibrator is used for correspondingly converting the high-frequency band audio electric signals or the medium-frequency band audio electric signals into audio signals in a mechanical vibration mode so as to finally transmit the audio signals into the auditory center of the cerebral cortex through the skull, the bone labyrinth, the inner ear lymph fluid, the spiral organ and the auditory nerve of the human body to realize the auditory sound.
In step S104: adjusting the upper limit frequency and the lower limit frequency of the frequency range of the low-frequency-band audio electric signal, the middle-frequency-band audio electric signal and the high-frequency-band audio electric signal;
in an embodiment of the invention: a user can adjust the upper limit frequency and the lower limit frequency of the frequency range of the low-frequency-band audio electric signal, the middle-frequency-band audio electric signal and the high-frequency-band audio electric signal by sensing the effect of the received audio signal and the audio signal in the form of mechanical vibration, control the middle-frequency-band audio electric signal to be played through the bone conduction vibrating piece or the loudspeaker, and control the bone conduction vibrator or the loudspeaker to work or stop working; the use requirements of users are met, and the applicability is wide; in an embodiment of the invention: the bone conduction sound transmission device is a bone conduction earphone.
After the first audio electric signal is divided into the low-frequency-band audio electric signal, the medium-frequency-band audio electric signal and the high-frequency-band audio electric signal, the high-frequency-band audio electric signal and the medium-frequency-band audio electric signal are distributed to the bone conduction vibrator to be correspondingly converted into the audio signals in the mechanical vibration mode for sound transmission, and the low-frequency-band audio electric signal is distributed to the loudspeaker to be correspondingly converted into the audio signals for playing, so that the bass sound transmission is completed, the defect that the bone conduction vibrator cannot realize the bass sound transmission is overcome, and the user experience is improved; the frequency range of the low-frequency band audio electric signal, the middle-frequency band audio electric signal and the high-frequency band audio electric signal can be adjusted, and the middle-frequency band audio electric signal is controlled to transmit sound for a user through the bone conduction vibrator or the loudspeaker; the requirements of different users on the sound effect are met, and the applicability is wide.
Example three:
fig. 13 shows a flow of implementing echo cancellation in a bone conduction acoustic transmission apparatus according to a third embodiment of the present invention, and for convenience of description, only the portions related to the third embodiment of the present invention are shown, and the difference between the third embodiment and the second embodiment is that the third embodiment further includes:
in step S201: picking up a voice audio signal sent by a user and a natural audio signal of the surrounding environment of the user and correspondingly converting the voice audio signal and the natural audio signal into a second audio electric signal;
in the real-time example of the invention: the method comprises the following steps that an analog microphone and a digital microphone are matched to pick up a voice audio signal sent by a user and a natural audio signal of the surrounding environment of the user, wherein the audio electrical signal output by the analog microphone needs to be subjected to analog-to-digital conversion;
in step S202: removing the first audio electrical signal from the second audio electrical signal to form a third audio electrical signal;
in step S203: transmitting a third audio electrical signal;
in an embodiment of the invention: the first audio electric signal is eliminated from the second audio electric signal to form a third audio electric signal so as to eliminate echo and ensure the communication quality, and an audio playing function can be normally used when the bone conduction sound transmission device is used for recording; the transmitted third audio signal is received by the mobile terminal, and functions of communication, recording and the like are realized through the bone conduction microphone device; performing noise suppression processing on both the second audio electrical signal and the first audio electrical signal before removing the first audio electrical signal from the second audio electrical signal to form a third audio electrical signal; carrying out noise suppression processing on the first audio electric signal before correspondingly converting the first audio electric signal into an audio signal in a mechanical vibration form, and carrying out noise suppression processing on the first audio electric signal before correspondingly converting the first audio electric signal into the audio signal; to improve user experience; in an embodiment of the invention: the bone conduction sound transmission device is a bone conduction earphone.
Example four:
fig. 14 shows a flow of implementing voice control of a bone conduction microphone apparatus according to a fourth embodiment of the present invention, and for convenience of description, only the portions related to the fourth embodiment of the present invention are shown, and the fourth embodiment is different from the third embodiment and the second real-time embodiment in that the fourth embodiment further includes:
in step S301: detecting whether the third audio electrical signal contains a wakeup audio electrical signal corresponding to a preset wakeup voice instruction;
in an embodiment of the invention: detecting whether the third audio electrical signal contains a wakeup audio electrical signal corresponding to a preset wakeup voice instruction, if so, continuing to execute the step S302 and sending a wakeup success message, otherwise, not serving as the wakeup success message; further preferably, if it is detected that the third audio electrical signal includes a wake-up audio electrical signal corresponding to a preset wake-up voice command, the bone conduction vibrator is controlled to send a wake-up success audio signal in the form of mechanical vibration and the speaker is controlled to send a wake-up success audio signal, for example: and setting the voice instruction corresponding to the awakening successful audio signal as: if I is awakened, the bone conduction sound transmission device plays a voice prompt of 'I is awakened' after being awakened by voice; for example: setting a wake-up voice instruction as follows: hi, detecting a hi-level audio electrical signal corresponding to the hi-level from the third audio electrical signal, continuing to execute step S302 and sending a wake-up success message to the mobile terminal, so that the user can obtain the state of the bone conduction microphone device;
in step S302: detecting whether the third audio electrical signal contains an operation audio electrical signal corresponding to a preset operation voice instruction or not;
in an embodiment of the invention: detecting whether the third audio electrical signal contains an operation audio electrical signal corresponding to a preset operation voice instruction, if so, sending the operation voice instruction or executing the operation voice instruction, and if not, taking the operation voice instruction as the operation voice instruction; the operation voice command not only includes a function setting command (volume +/-, pause/play, previous song/next song, etc.), but also includes a social question and answer, for example, the operation command is set as: look up weather, day of week today.
In step S303: sending an operation voice instruction or executing the operation voice instruction;
in an embodiment of the invention: the operation voice instruction is sent to the mobile terminal and sent to the remote server through the mobile terminal, and then the result is fed back to the bone conduction voice transmission device for playing, so that intelligent communication is realized, the latest information stored in the remote server can be obtained in real time, and the latest operation voice instruction is updated from the remote server; the intelligent degree is improved; in an embodiment of the invention: the bone conduction sound transmission device is a bone conduction earphone.
Example five:
for convenience of description, only the parts related to the fifth embodiment of the present invention are shown in the implementation flow of the subwoofer sound transmission method based on the bone conduction sound transmission device provided in the fifth embodiment of the present invention, and the difference between the fifth embodiment and the fourth embodiment, the third embodiment and the second embodiment is that the implementation flow further includes:
detecting the wearing state of the bone conduction sound transmission device, and controlling the bone conduction vibrator or the loudspeaker to work or stand by and send wearing state information when the bone conduction sound transmission device is worn on the limb of a user;
in an embodiment of the invention: detecting the wearing state of the bone conduction sound transmission device by using an infrared sensor, wherein the wearing state information is sent to the mobile terminal for a user to check;
detecting the posture or the motion speed of the bone conduction sound transmission device and sending the detected result, or controlling the bone conduction vibrator to send out an alarm audio signal in a mechanical vibration mode and controlling the loudspeaker to send out an alarm audio signal according to the posture or the motion speed or the wearing state of the bone conduction sound transmission device;
in an embodiment of the invention: acquiring the posture of the bone conduction sound transmission device by using a gyroscope and acquiring the motion speed of the bone conduction sound transmission device by using an accelerometer; when the bone conduction sound transmission device is in a wearing state, the posture of the bone conduction sound transmission device does not meet the set requirement, an alarm sound is given out, or the movement speed does not meet the set requirement and also an alarm sound is given out; the function is used in the scenes of user sitting posture correction, movement speed monitoring and the like; in an embodiment of the invention: the bone conduction sound transmission device is a bone conduction earphone.
Example six:
for convenience of description, only the parts related to the embodiments of the present invention are shown in the bone conduction acoustic transmission device with heavy bass provided in the sixth embodiment of the present invention, where the parts include:
a transmitting and receiving unit for receiving the first audio electrical signal and transmitting the third audio electrical signal;
the bone conduction vibrator is used for correspondingly converting the first audio electric signal into an audio signal in a mechanical vibration mode;
the loudspeaker is used for correspondingly converting the first audio electric signal into an audio signal;
the frequency division unit is used for carrying out frequency division on the first audio electric signal according to the preset frequency range of the low-frequency-band audio electric signal, the medium-frequency-band audio electric signal and the high-frequency-band audio electric signal, and comprises the following steps: dividing the first audio electrical signal into a low-frequency-band audio electrical signal, a medium-frequency-band audio electrical signal and a high-frequency-band audio electrical signal according to the frequency of the first audio electrical signal;
the frequency band division adjusting unit is used for adjusting the upper limit frequency and the lower limit frequency of the frequency band range of the low-frequency band audio electric signal, the middle-frequency band audio electric signal and the high-frequency band audio electric signal;
the audio playing control unit is used for controlling the loudspeaker to correspondingly convert the low-frequency band audio electric signal or the medium-frequency band audio electric signal into an audio signal, controlling the bone conduction vibrator to correspondingly convert the high-frequency band audio electric signal or the medium-frequency band audio electric signal into an audio signal in a mechanical vibration mode, and controlling the bone conduction vibrator or the loudspeaker to work or stop working;
the sound pickup unit is used for picking up a voice audio signal sent by a user and a natural audio signal of the surrounding environment of the user and correspondingly converting the voice audio signal and the natural audio signal into a second audio signal;
an echo cancellation unit that cancels the first audio electrical signal from the second audio electrical signal to form a third audio electrical signal;
a noise suppression unit configured to perform noise suppression processing on both the second audio electrical signal and the first audio electrical signal before the first audio electrical signal is removed from the second audio electrical signal to form a third audio electrical signal;
the method comprises the steps that noise suppression processing is carried out on a first audio electric signal through a noise suppression unit before the first audio electric signal is correspondingly converted into an audio signal in a mechanical vibration form, and noise suppression processing is carried out on the first audio electric signal through the noise suppression unit before the first audio electric signal is correspondingly converted into the audio signal;
the voice awakening unit is used for detecting whether the third audio electrical signal contains an awakening audio electrical signal corresponding to the preset awakening voice instruction, if so, detecting whether the third audio electrical signal contains an operating audio electrical signal corresponding to the preset operating voice instruction and sending awakening success information, and if not, determining the third audio electrical signal does not contain the operating audio electrical signal corresponding to the preset operating voice instruction; if the third audio electrical signal contains an operation audio electrical signal corresponding to a preset operation voice instruction, the sending and receiving unit sends the operation voice instruction or executes the operation voice instruction, otherwise, the third audio electrical signal is not used as the operation audio electrical signal;
the wearing state detection unit is used for detecting the wearing state of the bone conduction sound transmission device, and the bone conduction sound transmission device is worn on the limb of a user, controls the bone conduction vibrator or the bone conduction vibrator and the loudspeaker to work or stand by and sends wearing state information through the sending and receiving unit;
the motion detection unit is used for detecting the posture or the motion speed of the bone conduction sound transmission device and sending the detected result through the sending and receiving unit, or controlling the bone conduction vibrator to send out an alarm audio signal in a mechanical vibration mode and controlling the loudspeaker to send out an alarm audio signal according to the posture or the motion speed or the wearing state of the bone conduction sound transmission device through the audio feedback unit;
and the audio feedback unit controls the bone conduction vibrator to send out a mechanical vibration type awakening success audio signal and controls the loudspeaker to send out an awakening success audio after receiving the awakening success information.
In the real-time example of the invention: the bone conduction acoustic transmission device is charged using a detachable electrical connection, for example: magnetic attraction type charging; a telephone answering/hanging-up button and an emergency help-seeking button are also arranged, so that the telephone answering/hanging-up and the getting-off are facilitated; in an embodiment of the invention: the bone conduction sound transmission device is a bone conduction earphone.
In the embodiment of the present invention, each unit may be implemented by a corresponding hardware or software unit, and each unit may be an independent software or hardware unit, or may be integrated into a software or hardware unit, which is not limited herein;
it will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (6)
1. A kind of heavy bass sound transmission circuit based on bone conduction sound transmission device, including multiple bone conduction vibrators and multiple loudspeakers; it is characterized in that the preparation method is characterized in that,
further comprising: the system comprises a Bluetooth microcontroller, a plurality of digital microphones, a plurality of analog microphones, a photoelectric wearing detection sensor, a storage chip, a voice processor and a power amplifier chip;
the Bluetooth microcontroller is used for carrying out wireless Bluetooth connection with the mobile terminal, receiving an audio signal and a control instruction sent by the mobile terminal and sending the audio signal and a feedback instruction to the mobile terminal;
the power amplifier chip is respectively connected with the loudspeaker and the Bluetooth microcontroller;
the voice processor is connected with the Bluetooth microcontroller, and the storage chip and the plurality of digital microphones are connected with the voice processor;
the photoelectric wearing detection sensor is connected with the Bluetooth microcontroller; and the plurality of analog microphones are also connected with the Bluetooth microcontroller.
2. The bone conduction acoustic apparatus-based subwoofer acoustic circuit according to claim 1, wherein the plurality of bone conduction vibrators include a first bone conduction vibrator and a second bone conduction vibrator;
an AUDIO _ HPL _ P/SPKL _ P end of the Bluetooth microcontroller is connected with a first end of the first bone conduction oscillator, and an AUDIO _ HPL _ N/SPKL _ N end of the Bluetooth microcontroller is connected with a second end of the first bone conduction oscillator; an AUDIO _ HPR _ N/SPKR _ N end of the Bluetooth microcontroller is connected with a first end of the second bone conduction oscillator, and an AUDIO _ HPR _ P/SPKR _ P end of the Bluetooth microcontroller is connected with a second end of the second bone conduction oscillator.
3. The bone conduction acoustic transmission device-based subwoofer acoustic transmission circuit according to claim 1, wherein the INR + terminal of the power amplifier chip is connected with a first capacitor, the negative electrode of the first capacitor is connected with the INR + terminal of the power amplifier chip, and the positive electrode of the first capacitor is connected with the SPK _ RP terminal of the bluetooth microcontroller;
the INR-end of the power amplifier chip is connected with a second capacitor, the negative electrode of the second capacitor is connected with the INR-end of the power amplifier chip, and the positive electrode of the second capacitor is connected with the SPK _ RN end of the Bluetooth microcontroller;
the INL-end of the power amplifier chip is connected with a third capacitor, the negative electrode of the third capacitor is connected with the INL-end of the power amplifier chip, and the positive electrode of the third capacitor is connected with the SPK _ LN end of the Bluetooth microcontroller;
the INL + end of the power amplifier chip is connected with a fourth capacitor, the negative electrode of the fourth capacitor is connected with the INL + end of the power amplifier chip, and the positive electrode of the fourth capacitor is connected with the SPK _ LP end of the Bluetooth microcontroller;
the SDR end of the power amplifier chip is connected with the SDL end and is also connected with a first pull-up resistor and a pull-down resistor, the other end of the first pull-up resistor is connected with the anode of a power supply, and the other end of the pull-down resistor is connected with the cathode of the power supply and is grounded; the SDR end of the power amplifier chip is also connected with the GPIO22 end of the Bluetooth microcontroller;
the plurality of speakers includes a first speaker and a second speaker;
the OUL + end of the power amplifier chip is connected with the first end of the first loudspeaker, and the OUT-end of the power amplifier chip is connected with the second end of the first loudspeaker;
the OUR + end of the power amplifier chip is connected with the first end of the second loudspeaker, and the OUR-end of the power amplifier chip is connected with the second end of the second loudspeaker.
4. The bone conduction sound conduction device based subwoofer sound conduction circuit according to claim 1, wherein the IO _16 terminal of the speech processor is connected with the GPIO27 terminal of the bluetooth microcontroller and the IO _17 terminal is connected with the GPIO24 terminal of the bluetooth microcontroller;
the IO _19 end of the voice processor is connected with the GPIO25 end of the Bluetooth microcontroller, and the IO _20 end is connected with the GPIO26 end of the Bluetooth microcontroller;
the CS end of the storage chip is connected with the IO _39 end of the speech processor, the SO end of the storage chip is connected with the IO _36 end of the speech processor, the CCLK end of the storage chip is connected with the IO _34 end of the speech processor, and the SI/SIO0 end of the storage chip is connected with the IO _38 end of the speech processor;
DATA terminals of a plurality of digital microphones are connected with an IO _28 terminal of the speech processor, and CLK terminals are connected with an IO _8 terminal of the speech processor.
5. The bone conduction acoustic conduction device-based subwoofer acoustic conduction circuit according to claim 3, wherein the VCC terminal and + IR terminal of the electro-optical wear detection sensor are both connected to the VCCIO terminal of the Bluetooth microcontroller and the-IR 1 terminal is connected to the GPIO28 terminal of the Bluetooth microcontroller; and the VOUT end of the photoelectric wearing detection sensor is connected with the GPIO21 end of the Bluetooth microcontroller.
6. The bone conduction acoustic transmission apparatus-based subwoofer acoustic transmission circuit of claim 1, wherein the plurality of analog microphones includes a first analog microphone and a second analog microphone;
the VDD ends of the first analog microphone and the second analog microphone are connected with the MIC _ BIAS2 end of the Bluetooth microcontroller; the OUTPUT end of the first analog microphone is connected with a fifth capacitor, and the other end of the fifth capacitor is connected with the MIC _ LP end of the Bluetooth microcontroller; and the OUTPUT end of the second analog microphone is connected with a sixth capacitor, and the other end of the sixth capacitor is connected with the MIC _ RP end of the Bluetooth microcontroller.
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| CN202020599255.5U CN211406257U (en) | 2020-04-21 | 2020-04-21 | Bass sound transmission circuit based on bone conduction sound transmission device |
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| CN202020599255.5U CN211406257U (en) | 2020-04-21 | 2020-04-21 | Bass sound transmission circuit based on bone conduction sound transmission device |
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| CN211406257U true CN211406257U (en) | 2020-09-01 |
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