CN111654772B - Bluetooth headset amplifier and use bluetooth headset of this amplifier - Google Patents

Bluetooth headset amplifier and use bluetooth headset of this amplifier Download PDF

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Publication number
CN111654772B
CN111654772B CN202010434818.XA CN202010434818A CN111654772B CN 111654772 B CN111654772 B CN 111654772B CN 202010434818 A CN202010434818 A CN 202010434818A CN 111654772 B CN111654772 B CN 111654772B
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module
sound
bluetooth
sound source
bluetooth headset
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CN111654772A (en
Inventor
杈逛豢
边仿
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Kunshan Haifeiman Technology Group Co ltd
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Head Direct Kushan Co ltd
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    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones

Abstract

A Bluetooth headset amplifier comprises a Bluetooth module, a process control module, a signal modulation module and a shielding layer, wherein the Bluetooth module is detachably connected to an outer shell of a high-sound-quality headset, and the working state of the Bluetooth module is controlled by analyzing characteristic information of a sound source file, so that the influence of a near-end Bluetooth radio frequency interference source on the high-sound-quality headset is controlled; the Bluetooth headset amplifier also comprises a shielding layer structure which directionally blocks and reflects the near-end radio frequency radiation interference of the Bluetooth headset amplifier on the high-sound-quality headset; the invention also provides a Bluetooth headset based on the flat plate type or electrostatic sounding unit, wherein the sounding unit comprises a shielding shell consisting of a side wall, a rear wall and a front grid, so that the Bluetooth headset can protect external radio frequency radiation interference and does not influence the sound field and the sound response effect of the flat plate type or electrostatic sounding unit.

Description

Bluetooth headset amplifier and use bluetooth headset of this amplifier
Technical Field
The invention relates to the technical field of high-sound-quality earphones, in particular to a Bluetooth earphone amplifier and a Bluetooth earphone using the same.
Background
The existing Bluetooth headset is limited by the volume of the headset and the capacity of a driving unit, only a moving coil or moving iron type sound production unit can be adopted, and the sound field and the sound image performance are poor; meanwhile, for a flat-panel or electrostatic speaker with a strong sound field and sound image expression, a large driving power is required, the requirement on a front-end driving device is extremely high, and the sound production quality can be ensured only by additionally arranging an ear amplifier (earphone amplifier). Therefore, it is a difficult problem in the technical field of high-quality earphones to provide high-quality auditory enjoyment and to enable users to get rid of the constraint of transmission harnesses.
Thanks to the rapid development of bluetooth technology and high-capacity battery technology in recent years, bluetooth ear-play technology becomes possible. The current bluetooth ear is put and is put bluetooth transmission technology and traditional ear and combine, through bluetooth module and sound source equipment wireless connection, converts the digital signal that bluetooth module decoded into analog signal and provides DAC circuit, passes through data transmission line input earphone with the analog signal after the modulation by DAC circuit again to the data line restriction of equipment is put to the liberation sound source equipment and ear to a certain extent. However, this connection does not really get the high-quality headphones free from the connection cord. If the data transmission line between the Bluetooth earphone and the high-sound-quality earphone is shortened and the Bluetooth earphone is directly plugged or integrated in the input interface of the high-sound-quality earphone, the distance between the signal source and the sound production unit is shortened, and the high-frequency communication signal introduces a radio frequency interference source to the sound production unit and the driving circuit of the high-sound-quality earphone. Particularly for the flat plate type and electrostatic sounding unit, the radio frequency interference source has strong interference on a relatively open magnetic circuit structure in the flat plate type unit structure and an electric field of a high-voltage electrode plate in the electrostatic unit structure, so that the frequency response and the tone quality performance of the sounding unit are influenced. Therefore, how to solve the problem of the interference of the bluetooth ear playing device or module on the flat plate type or electrostatic sounding unit becomes a great obstacle to the development of high-quality wireless earphone technology.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a Bluetooth headset amplifier, which comprises a Bluetooth module, a process control module, a signal modulation module and a shielding layer, wherein the Bluetooth headset amplifier is detachably connected to an outer shell of a high-sound-quality headset and controls the working state of the Bluetooth module by analyzing the characteristic information of a sound source file;
the Bluetooth module comprises a fixed frequency broadcasting sub-module, an equipment authentication sub-module and a sound source transmission sub-module; the fixed frequency broadcasting sub-module is used for sending a connection request signal to the sound source equipment through a GAP sub-protocol; the equipment authentication sub-module is used for distributing and pairing the secret key between the SM sub-protocol and the sound source equipment; the sound source transmission submodule is used for transmitting sound source files with the sound source equipment through an ATT (automatic test) protocol after the fixed-frequency broadcasting submodule and the equipment authentication submodule complete connection pairing or pairing reconnection;
the process control module is used for analyzing the characteristic information of the sound source file and setting communication time according to the characteristic information of the sound source file;
the fixed frequency broadcasting sub-module broadcasts a connection request signal outwards in the communication time and keeps silent in the non-communication time; the sound source transmission sub-module starts a high power consumption mode in the communication time and starts a low power consumption mode or a silent mode in the non-communication time;
the shielding layer is arranged on one side of the Bluetooth headset amplifier, which is in contact with a high-sound-quality headset, and is used for directionally reducing radio frequency radiation interference of the Bluetooth module to one side of the high-sound-quality headset;
the signal modulation module is used for converting a digital signal and an analog signal and modulating an electric signal for driving the high-sound-quality earphone.
Preferably, the feature information of the sound source file includes track information, sound order information, synchronization information, CRC check information, channel mode information, sampling rate information, bit rate information, and duration information.
Preferably, the process control module further sets a working mode of the bluetooth module within each communication time according to the feature information of the sound source file.
Preferably, the bluetooth headset amplifier further comprises a control module, wherein the control module is configured to receive a control instruction of a user to the bluetooth headset amplifier; and the Bluetooth module changes the working mode according to the control instruction received by the control module.
Preferably, the working mode is changed according to the working state of the high-sound-quality earphone.
Preferably, the working modes include a high power consumption mode, a low power consumption mode and a silent mode;
the high power consumption mode is based on Bluetooth 5.1 standard, and in the high power consumption mode, the sound source transmission sub-module always keeps Bluetooth connection with sound source equipment and continuously caches sound source files to the Bluetooth headset amplifier;
the low power consumption mode executes a BLE protocol, and in the low power consumption mode, the sound source transmission sub-module executes a HOGP flow to keep connection with sound source equipment and keeps BLE data transmission when a sound source file of a current sound track is not cached;
and in the silent mode, the Bluetooth module stops signal transceiving.
Preferably, the shielding layer is made of a metal or alloy material; the shielding layer is provided with an inward reflection structure, the inward reflection structure comprises a first plane facing the high-tone-quality earphone and a second plane back to the high-tone-quality earphone, and an included angle between the first plane and the second plane is an obtuse angle; a hemispherical pit is arranged on the inner side of the first plane, and the diameter of the hemispherical pit is not more than 0.6 mm; the pits are uniformly arranged, and the distance between the arrangement area of the pits and the contact position of the first plane and the second plane is 0.8-1.6 mm.
The invention also provides the Bluetooth headset, which comprises the Bluetooth headset amplifier, wherein the Bluetooth headset adopts a flat plate type or electrostatic sound production unit, and the sound production unit comprises a shielding shell.
Preferably, the shielding shell comprises side walls, a rear wall and a front grid; the side wall comprises an outer wall and an inner liner; the front grid, the outer wall and the rear wall are made of non-magnetic conductive metal or alloy materials.
Preferably, the thickness of the outer wall is 0.5-1.5 mm; the lining is an insulating coating with the thickness of 5-50 mu m.
Preferably, the front grid is arranged perpendicular to the axial direction of the diaphragm in the sound generating unit; the front grid is in a grid shape and comprises grid lines and grid holes, and the diameter of each grid hole is not more than 100 mu m.
Preferably, the front grill is an integrally formed structure capable of allowing the passage of sound waves of 50Hz to 50kHz without phase distortion.
Drawings
FIG. 1 is a schematic diagram of the operation of a prior art Bluetooth headset amplifier;
fig. 2 is a first schematic diagram of the operation of the amplifier of the bluetooth headset according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a combined structure of a Bluetooth headset amplifier and a headset according to an embodiment of the present invention;
fig. 4 is a second schematic diagram of the operation of the bluetooth headset amplifier according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of an internal structure of a Bluetooth headset amplifier according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a shielding layer structure according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a sound unit shielding case of a bluetooth headset according to an embodiment of the present invention.
The system comprises a Bluetooth headset, a sound production unit, a Bluetooth headset amplifier, a sound production unit and a sound production unit, wherein the Bluetooth headset is 100-the sound production unit is 110-the Bluetooth headset amplifier is 120-the Bluetooth headset amplifier; 210-shielded enclosure, 211-side walls, 2111-outer walls, 2112-inner liner, 212-back wall, 213-front grid; 310-a Bluetooth module, 311-a fixed frequency broadcasting sub-module, 312-an equipment authentication sub-module, 313-an audio transmission sub-module, 320-a process control module and 330-a signal modulation module; 410-shielding layer, 411-plane one, 4111-pit, 412-plane two.
Detailed Description
In order to realize wireless playing of a high-tone-quality flat plate type or electrostatic earphone and reduce interference of radio frequency radiation of Bluetooth equipment on the flat plate type or electrostatic earphone, the Bluetooth earphone amplifier and the Bluetooth earphone using the amplifier are realized by the following technical scheme:
example 1:
referring to fig. 3 to fig. 5, fig. 3 is a schematic diagram of a combined structure of a bluetooth headset amplifier and a headset according to an embodiment of the present invention, fig. 4 is a second schematic diagram of an operating principle of the bluetooth headset amplifier according to the embodiment of the present invention, and fig. 5 is a schematic diagram of an internal structure of the bluetooth headset amplifier according to the embodiment of the present invention. The embodiment provides a bluetooth headset amplifier 120 for receiving an audio source and a control signal from an audio source device, decoding and modulating the audio source signal and outputting the decoded and modulated audio source signal to a high-quality headset, which comprises a bluetooth module 310, a process control module 320, a signal modulation module 330 and a shielding layer 410; bluetooth headset amplifier 120 detachably connects on the shell body of high tone quality earphone, especially, bluetooth headset amplifier 120 is direct through the connecting wire interface connection that sets up on 3.5mm or 2.5mm earphone interface and the high tone quality earphone, promptly bluetooth headset amplifier 120 has general suitability to removable connecting wire earphone.
The bluetooth module 310 comprises a fixed-frequency broadcasting sub-module 311, an equipment authentication sub-module 312 and a source transmission sub-module 313; the fixed frequency broadcasting sub-module 311 is configured to send a connection request signal to a sound source device through a GAP sub-protocol; the equipment authentication sub-module 312 is configured to distribute and pair the SM sub-protocol and the sound source equipment; the sound source transmission sub-module 313 is used for transmitting sound source files with the sound source equipment through an ATT protocol after the fixed frequency broadcasting sub-module 311 and the equipment authentication sub-module 312 complete connection pairing or pairing reconnection;
the bluetooth headset amplifier 120 controls the operating state of the bluetooth module 310 by analyzing the feature information of the audio source file.
The characteristic information of the sound source file comprises audio track information, sound sequence information, synchronization information, CRC (cyclic redundancy check) information, sound channel mode information, sampling rate information, bit rate information and duration information. The process control module 320 is configured to analyze the feature information of the sound source file and set communication time according to the feature information of the sound source file. Specifically, the process control module 320 obtains the size of the sound source file, the playing duration of the song, and the sound quality of the sound source file of the current playlist from the feature information, and accordingly, formulates a data transmission policy with the sound source device. The policy includes, but is not limited to, multi-file synchronous transfer; setting communication time and duration of each communication time according to the playing time of the sound source file; distributing the transmission sequence and transmission rate weight of the sound source files according to the sequence/duration of the communication time, the playing sequence of the sound source files, the current Bluetooth signal transmission capacity and the like. Subsequently, the bluetooth module 310 sets an operation mode according to the data transmission policy and the communication time set by the process control module 320.
The working modes comprise a high power consumption mode, a low power consumption mode and a silent mode. The high power consumption mode is based on the bluetooth 5.1 standard, and in the high power consumption mode, the sound source transmission sub-module 313 always keeps the bluetooth connection with the sound source device and continuously caches the sound source file to the bluetooth headset amplifier 120; the low power consumption mode executes a BLE protocol, and in the low power consumption mode, the sound source transmission sub-module 313 executes a hop process to keep connection with sound source equipment and keeps BLE data transmission when a sound source file of a current sound track is not cached; in the silent mode, the bluetooth module 310 or its sub-modules stop transmitting and receiving signals.
When the bluetooth headset amplifier 120 establishes a connection with a sound source device for the first time, the fixed-frequency broadcasting sub-module 311 continuously announces the broadcast according to the GAP sub-protocol, when the sound source device receives the broadcast announcement of the fixed-frequency broadcasting sub-module 311 during sweep scanning, the sound source device initializes and distributes a key and pairs with the device authentication sub-module 312 through the SM sub-protocol, and the sound source transmission sub-module 313 transmits sound source file data through the ATT protocol.
When the user starts playing music, the process control module 320 starts executing a data transmission strategy, and the fixed-frequency broadcasting sub-module 311 keeps silent during the non-communication time, so as to avoid the interference of the duplex mode of the bluetooth module 310 on the sound generating unit and the driving circuit of the high-quality earphone, which bring close-range high-intensity radio frequency signals. The audio transmission sub-module 313 operates in a low power mode or a silent mode. Specifically, for example, when the sampling rate and the bit rate of the sound source file are low, that is, the sound source file is not a high-sound-quality source file, the playing period less affected by the radio frequency radiation is set as the communication time according to the frame data information of the sound source file, and the sound source transmission sub-module 313 performs data transmission in the low power consumption mode to reduce the radio frequency radiation interference to the sound generating unit and the driving circuit of the high-sound-quality earphone during the operation thereof; for a high-sound-quality source file, the recording and restoring degree of sound details is high, the requirements on the frequency response, distortion and signal-to-noise ratio of a high-sound-quality earphone are high, the file capacity is large, and the loading requirement of the file cannot be met only by the transmission of a low-power consumption breakpoint in the playing process, at this time, the process control module 320 flexibly adjusts the duration of the playing gap between the songs according to the size, the playing time and the sequence of the sound source file in the playlist and the current transmission rate, sets the playing gap as the communication time, and preferentially transmits the high-sound-quality high-capacity sound source file in the current playlist by starting the high-power consumption working mode of the sound source transmission sub-module 313 at the communication time; specifically, the bluetooth headset amplifier 120 turns off the bluetooth module 310 when playing a high-quality sound source, and reconnects with the sound source device through the GAP protocol at the next communication time. The bluetooth headset amplifier 120 continuously transmits the uncompleted buffered sound source file from the sound source file according to the self-storage condition and the current and historical playlist information using the communication time and the standby time of the high sound quality headset.
The bluetooth headset amplifier 120 further comprises a control module, and the control module is configured to receive a control instruction of a user to the bluetooth headset amplifier 120; the bluetooth module 310 changes the working mode according to the control command received by the control module. The bluetooth module 310 also changes the operation mode according to the operation state of the high-quality earphone. Specifically, for example, when the user performs a fast-forward track command for sequential play using the control module, the data transmission policy is readjusted; particularly, when the user fast-forwards the track in the random play mode, the sound source file which has been cached or can be cached without affecting the track play in the track play process is preferentially played.
In the embodiment, a data transmission optimization strategy is adopted, so that the power consumption is reduced, and simultaneously, the radio frequency interference of the Bluetooth headset amplifier serving as a near-end radio frequency radiation interference source to the high-tone-quality headset, particularly to a flat plate type or electrostatic sounding unit of the high-tone-quality headset and a driving circuit of the flat plate type or electrostatic sounding unit is effectively reduced, so that the true wireless connection of the flat plate type or electrostatic high-tone-quality headset becomes possible.
Example 2:
referring to fig. 5-6, fig. 5 is a schematic diagram of an internal structure of a bluetooth headset amplifier according to an embodiment of the present invention, and fig. 6 is a schematic diagram of a shielding layer according to an embodiment of the present invention. In this embodiment, the bluetooth headset amplifier 120 further includes a shielding layer 410 for directionally blocking radio frequency radiation, and the shielding layer 410 is made of a metal or alloy material; the shielding layer 410 has an inward reflection structure, the inward reflection structure includes a first plane 411 facing the high-sound-quality earphone and a second plane 412 turned back to the high-sound-quality earphone, and an included angle between the first plane 411 and the second plane 412 is an obtuse angle; a hemispherical pit 4111 is arranged on the inner side of the first plane 411, and the diameter of the hemispherical pit 4111 is not more than 0.6 mm; the pits 4111 are uniformly arranged, and the distance between the arrangement area of the pits 4111 and the contact position of the first plane 411 and the second plane 412 is 0.8-1.6 mm.
In the embodiment, the shielding layer, the first plane, the second plane and the pits of the shielding layer can effectively block and reflect the near-end radio frequency radiation interference of the Bluetooth headset amplifier to the high-quality headset.
Example 3:
referring to fig. 7, fig. 7 is a schematic diagram of a structure of a sound unit shielding case of a bluetooth headset according to an embodiment of the present invention. The present embodiment provides a bluetooth headset 100, which includes the aforementioned bluetooth headset amplifier 120, wherein the bluetooth headset 100 employs a tablet-type or electrostatic sound generating unit 110, and the sound generating unit 110 includes a shielding housing 210.
In a preferred embodiment, the shielding shell 210 includes side walls 211, a back wall 212, and a front grill 213; the side wall 211 includes an outer wall 2111 and a liner 2112; the front grill 213, the outer wall 2111 and the rear wall 212 are made of a non-magnetically conductive metal or alloy material.
In a preferred embodiment, the outer wall 2111 has a thickness of 0.5-1.5 mm; the liner 2112 is an insulating coating 5-50 μm thick.
In a preferred embodiment, the front grill 213 is disposed perpendicular to the axial direction of the diaphragm in the sound generating unit 110; the front grid 213 is in a grid shape and comprises grid lines and grid holes, and the diameter of each grid hole is not more than 100 mu m.
In a preferred embodiment, the front grill 213 is an integrally formed structure that can allow 50Hz to 50kHz sound waves to pass through without phase distortion.
In this embodiment, the shielding case 210 is made of a non-magnetic conductive metal material, so that interference of the case on a relatively open magnetic field environment inside the flat sound generating unit 110 is avoided while external radio frequency radiation is blocked; the liner 2112 of the side wall 211 adopts an insulating coating to prevent the metal side wall material from being influenced by the polarization of the high-voltage electrode plate of the electrostatic sound generating unit 110; the front grating 213 is used as a sound wave outlet of the generating unit, the mesh holes with the diameter not more than 100 mu m are adopted, and the diffraction influence on the sound wave is optimized by adjusting the distance between the front grating and the vibrating diaphragm, so that the front grating can allow the sound wave of 50Hz to 50kHz to pass through without generating phase distortion, and the adverse influence on the sound field and the frequency response is reduced.
It should be noted that the above-mentioned embodiments are provided for further detailed description of the present invention, and the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a bluetooth headset amplifier, includes bluetooth module, process control module group, signal modulation module and shielding layer, its characterized in that:
the Bluetooth headset amplifier is detachably connected to the outer shell of the high-sound-quality headset, and the working state of the Bluetooth module is controlled by analyzing the characteristic information of the sound source file;
the Bluetooth module comprises a fixed frequency broadcasting sub-module, an equipment authentication sub-module and a sound source transmission sub-module; the fixed frequency broadcasting sub-module is used for sending a connection request signal to the sound source equipment through a GAP sub-protocol; the equipment authentication sub-module is used for distributing and pairing the secret key between the SM sub-protocol and the sound source equipment; the sound source transmission submodule is used for transmitting sound source files with the sound source equipment through an ATT (automatic test) protocol after the fixed-frequency broadcasting submodule and the equipment authentication submodule complete connection pairing or pairing reconnection;
the process control module is used for analyzing the characteristic information of the sound source file and setting communication time according to the characteristic information of the sound source file;
the fixed frequency broadcasting sub-module broadcasts a connection request signal outwards in the communication time and keeps silent in the non-communication time; the sound source transmission sub-module starts a high power consumption mode in the communication time and starts a low power consumption mode or a silent mode in the non-communication time;
the shielding layer is arranged on one side of the Bluetooth headset amplifier, which is in contact with the high-sound-quality headset, and is used for directionally reducing radio frequency radiation interference of the Bluetooth module to one side of the high-sound-quality headset;
the signal modulation module is used for converting a digital signal and an analog signal and modulating an electric signal for driving the high-sound-quality earphone.
2. The bluetooth headset amplifier of claim 1, wherein: the characteristic information of the sound source file comprises audio track information, sound sequence information, synchronization information, CRC (cyclic redundancy check) information, sound channel mode information, sampling rate information, bit rate information and duration information; and the process control module also sets the working mode of the Bluetooth module within each communication time according to the characteristic information of the sound source file.
3. The bluetooth headset amplifier of claim 1, wherein: the Bluetooth headset amplifier also comprises a control module, wherein the control module is used for receiving a control instruction of a user to the Bluetooth headset amplifier; and the Bluetooth module changes the working mode according to the control instruction received by the control module.
4. The bluetooth headset amplifier of claim 3, wherein: and the working mode is changed according to the working state of the high-sound-quality earphone and the Bluetooth module.
5. The bluetooth headset amplifier of any one of claims 3-4, wherein: the working modes comprise a high power consumption mode, a low power consumption mode and a silent mode;
the high power consumption mode is based on Bluetooth 5.1 standard, and in the high power consumption mode, the sound source transmission sub-module always keeps Bluetooth connection with sound source equipment and continuously caches sound source files to the Bluetooth headset amplifier;
the low power consumption mode executes a BLE protocol, and in the low power consumption mode, the sound source transmission sub-module executes a HOGP flow to keep connection with sound source equipment and keeps BLE data transmission when a sound source file of a current sound track is not cached;
and in the silent mode, the Bluetooth module stops signal transceiving.
6. The bluetooth headset amplifier of claim 1, wherein: the shielding layer is made of a metal material; the shielding layer is provided with an inward reflection structure, the inward reflection structure comprises a first plane facing the high-tone-quality earphone and a second plane back to the high-tone-quality earphone, and an included angle between the first plane and the second plane is an obtuse angle; a hemispherical pit is arranged on the inner side of the first plane, and the diameter of the hemispherical pit is not more than 0.6 mm; the pits are uniformly arranged, and the distance between the arrangement area of the pits and the contact position of the first plane and the second plane is 0.8-1.6 mm.
7. A bluetooth headset comprising the bluetooth headset amplifier of any one of claims 1-6, characterized in that: the Bluetooth headset adopts a flat plate type or electrostatic sounding unit, and the sounding unit comprises a shielding shell.
8. The bluetooth headset of claim 7, wherein: the shielding shell comprises a side wall, a rear wall and a front grid; the side wall comprises an outer wall and an inner liner; the front grid, the outer wall and the rear wall are made of non-magnetic-conductive metal materials.
9. The bluetooth headset of claim 8, wherein: the thickness of the outer wall is 0.5-1.5 mm; the lining is an insulating coating with the thickness of 5-50 mu m; the front grid is arranged perpendicular to the axial direction of the vibrating diaphragm in the sound generating unit; the front grid is in a grid shape and comprises grid lines and grid holes, and the diameter of each grid hole is not more than 100 mu m.
10. The bluetooth headset of claim 9, wherein: the front grating is an integrated structure which can allow 50Hz to 50kHz sound waves to pass through without generating phase distortion.
CN202010434818.XA 2020-05-21 2020-05-21 Bluetooth headset amplifier and use bluetooth headset of this amplifier Active CN111654772B (en)

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813000C2 (en) * 1977-03-24 1982-04-08 Andreas Milano Pavel Electroacoustic system for high quality reproduction of audio events
US7095862B2 (en) * 2002-01-31 2006-08-22 Church Of Spirtual Technology Headphone amplifier
CN102543151A (en) * 2011-12-21 2012-07-04 边仿 MP3 player with headphone amplifier card capable of being replaced
TWI601428B (en) * 2015-05-06 2017-10-01 酷碼科技股份有限公司 Customization earphone structure and detachable audio-broadcasting module
CN109587669B (en) * 2019-01-16 2022-10-25 平安科技（深圳）有限公司 Bluetooth pairing method and device, readable storage medium and terminal equipment

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Address after: No. 2001, Yingbin West Road, Bacheng Town, Kunshan City, Suzhou City, Jiangsu Province, 215311

Patentee after: Kunshan Haifeiman Technology Group Co.,Ltd.

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