CN113163310A - Microphone - Google Patents

Microphone Download PDF

Info

Publication number
CN113163310A
CN113163310A CN202110475922.8A CN202110475922A CN113163310A CN 113163310 A CN113163310 A CN 113163310A CN 202110475922 A CN202110475922 A CN 202110475922A CN 113163310 A CN113163310 A CN 113163310A
Authority
CN
China
Prior art keywords
microphone
electrically connected
noise reduction
conversion module
circuit board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110475922.8A
Other languages
Chinese (zh)
Inventor
郑润远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enping Tianlang Electroacoustic Equipment Co ltd
Original Assignee
Enping Tianlang Electroacoustic Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enping Tianlang Electroacoustic Equipment Co ltd filed Critical Enping Tianlang Electroacoustic Equipment Co ltd
Priority to CN202110475922.8A priority Critical patent/CN113163310A/en
Publication of CN113163310A publication Critical patent/CN113163310A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/03—Reduction of intrinsic noise in microphones

Abstract

The invention provides a microphone which comprises a shell, an acoustic-electric conversion module, an impedance conversion module and a noise reduction connector. The sound-electricity conversion module is arranged in the shell; the impedance transformation module is connected with the shell; the noise reduction connector is arranged in the shell, one end of the noise reduction connector is electrically connected with the sound-electricity conversion module, the other end of the noise reduction connector covers the impedance transformation module and is electrically connected with the impedance transformation module, and the noise reduction connector and the impedance transformation module form an electromagnetic shielding cabin. The invention can reduce the inherent noise of the microphone and improve the anti-interference capability and the signal-to-noise ratio of the microphone.

Description

Microphone
Technical Field
The invention relates to the technical field of audio, in particular to a microphone.
Background
The electret condenser microphone is an electronic device widely used in sound collecting equipment, and is used for collecting sound waves, converting the sound waves into electric signals, and enabling the sound to be transmitted or stored through a transmission cable or electronic equipment. With the improvement of the process and materials, many performances of the electret condenser microphone are improved, but the electret condenser microphone still has defects in the aspect of anti-interference capability, the signal-to-noise ratio performance still stays at a lower level, and in many application occasions with higher requirements on sound quality, a strict shielding device is required to be arranged to achieve the aim of anti-interference, so that the cost and the complexity of sound collecting equipment are increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a microphone, which can reduce the inherent noise of the microphone and improve the anti-interference capability and the signal-to-noise ratio of the microphone.
A microphone according to an embodiment of the present invention includes:
a housing;
the sound-electricity conversion module is arranged in the shell;
an impedance transformation module connected to the housing;
the noise reduction connector is arranged in the shell, one end of the noise reduction connector is electrically connected with the acoustic-electric conversion module, and the other end of the noise reduction connector covers the impedance transformation module and is electrically connected with the impedance transformation module.
The microphone according to the embodiment of the invention has at least the following beneficial effects:
the microphone comprises a shell, an acoustic-electric conversion module, an impedance transformation module and a noise reduction connector. The acoustic-electric conversion module receives acoustic waves and converts the acoustic waves into electric signals. The impedance transformation module is connected with the shell, one end of the noise reduction connector is electrically connected with the sound-electricity conversion module, and the other end of the noise reduction connector covers the elements of the impedance transformation module and is electrically connected with the impedance transformation module. The electric signal generated by the sound-electricity conversion module can be transmitted to the impedance conversion module through the noise reduction connector, the noise reduction connector covers the elements of the impedance conversion module, the noise reduction connector and the impedance conversion module form an electromagnetic shielding cabin, the electromagnetic shielding cabin plays a role in shielding the elements of the impedance conversion module, the receiving sensitivity of the impedance conversion module to external electromagnetic interference signals can be reduced, the inherent noise of the microphone can be reduced, and the signal-to-noise ratio and the anti-interference capability of the microphone are improved.
According to some embodiments of the present invention, the microphone further includes a support, the support is disposed in the housing and located between the acoustic-electric conversion module and the impedance conversion module, the noise reduction connector is disposed through the support, the acoustic-electric conversion module includes a vibrating diaphragm, a gasket, and a pole plate, the pole plate is connected to the support, the gasket is disposed between the vibrating diaphragm and the pole plate, and the noise reduction connector is electrically connected to the pole plate.
According to some embodiments of the present invention, a steel mesh is disposed between the housing and the sound-electricity conversion module, a tension membrane ring is disposed on the circumference of the diaphragm, and the steel mesh is connected to the housing and the tension membrane ring.
According to some embodiments of the invention, the impedance transformation module comprises a circuit board, the circuit board is connected with the housing, a field effect transistor and a first conductor are arranged on the circuit board, the first conductor is electrically connected with a gate of the field effect transistor, and the noise reduction connector is electrically connected with the first conductor.
According to some embodiments of the invention, the noise reduction connector comprises a spring and a shield, one end of the spring is electrically connected to the pole plate, the other end of the spring is connected to the shield, the shield is electrically connected to the first conductor, and the shield covers the fet.
According to some embodiments of the invention, a holding groove is formed in one surface of the bracket, which is close to the impedance conversion module, a damping sheet and a spongy cushion are arranged in the holding groove, and the groove bottom of the holding groove, the damping sheet, the spongy cushion and the circuit board are sequentially connected.
According to some embodiments of the invention, the receiving groove is arranged around a circumference of the shielding case, the receiving groove forms a connecting column on the bracket, a shielding cylinder is arranged on the connecting column, a second conductor is arranged on the circuit board, the shielding cylinder is electrically connected with the circuit board through the second conductor, and the shielding case is arranged in the shielding cylinder.
According to some embodiments of the invention, the second electrical conductor is electrically connected to a source of the field effect transistor.
According to some embodiments of the invention, the second electrical conductor and the source of the field effect transistor are electrically connected to a ground of the circuit board.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an exploded view of a microphone provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a microphone according to another embodiment of the present invention;
FIG. 3 is an exploded view of a microphone in accordance with another embodiment of the present invention;
FIG. 4 is an exploded view of a microphone in accordance with another embodiment of the present invention;
fig. 5 is a schematic view of an internal structure of a microphone according to another embodiment of the present invention;
fig. 6 is a schematic view of an internal structure of a microphone according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The microphone of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides a microphone including a case 100, a supporter 200, an acoustic-electric conversion module 300, an impedance transformation module 400, and a noise reduction connector 500. A sound inlet 110 is provided in the bottom surface of the cylindrical casing 100, and the impedance conversion module 400 is connected to the casing 100 to form a housing chamber. The bracket 200 is arranged in the accommodating cavity, the side surface of the bracket 200 is connected with the side wall of the casing 100 to play the roles of filling the accommodating cavity and supporting the sound-electricity conversion module 300, one surface of the bracket 200 far away from the sound inlet 110 is connected with the impedance transformation module 400, and one surface of the bracket 200 close to the sound inlet 110 forms a sound cavity with the casing 100. The sound-electricity conversion module 300 is disposed in the sound cavity, and the sound-electricity conversion module 300 is connected to the side wall of the casing 100 and a surface of the support 200 near the sound inlet 110. The axial line of the bracket 200 is provided with a through hole 210 penetrating through the bracket 200, the noise reduction connector 500 is arranged through the through hole 210, one end of the noise reduction connector 500 is electrically connected with the sound-electricity conversion module 300, the other end of the noise reduction connector 500 covers the elements of the impedance conversion module 400 and is electrically connected with the impedance conversion module 400, an electric signal generated by the sound-electricity conversion module 300 can be transmitted to the impedance conversion module 400 through the noise reduction connector 500, the noise reduction connector 500 covers the elements on the impedance conversion module 400, the noise reduction connector 500 and the impedance conversion module 400 form an electromagnetic shielding cabin, the electromagnetic shielding cabin plays a role in shielding the elements of the impedance conversion module 400, the receiving sensitivity of the impedance conversion module 400 to external electromagnetic interference signals can be reduced, the inherent noise of the microphone can be reduced, and the signal to noise ratio and the anti-interference capability of the microphone can be improved.
Further, the acoustic-electric conversion module 300 includes a diaphragm 310, a gasket 320, and a pole plate 330. One side of the pole plate 330 is connected with the support 200, one side of the gasket 320 is connected with the side of the pole plate 330 far from the support 200, a tension ring 311 is arranged in the circumferential direction of the diaphragm 310, the tension ring 311 is connected with the side wall of the shell 100, one side of the tension ring 311 is connected with the side of the gasket 320 far from the pole plate 330, the gasket 320 is made of insulating materials, the diaphragm 310 is separated from the pole plate 330, an insulating medium layer (thin flow layer) made of air is formed between the diaphragm 310 and the pole plate 330, the diaphragm 310 and the pole plate 330 form a transduction capacitor with constant charge and changeable capacitance, when the diaphragm 310 is vibrated by sound waves, the capacitance value of the transduction capacitor is changed, an electric field between the diaphragm 310 and the pole plate 330 is changed, and accordingly, alternating voltage changing along with the sound waves is generated, and transduction is realized. The noise reduction connector 500 is electrically connected to the electrode plate 330, and the alternating voltage is output to the impedance transformation module 400 through the noise reduction connector 500. It should be noted that the case 100 is made of a conductive material, the diaphragm 310 is electrically connected to the case 100 through the tension ring 311, the case 100 is electrically connected to the ground of the impedance transformation module 400, and the alternating voltage generated between the diaphragm 310 and the pole plate 330 is output to the components of the impedance transformation module 400 through the case 100 and the noise reduction connector 500. The noise reduction connector 500 covering the components of the impedance transformation module 400 is used for transmitting alternating voltage, so that the interference of an external electromagnetic field on the components of the impedance transformation module 400 is reduced under the condition of not weakening useful signals, the inherent noise of the microphone is reduced, and the signal-to-noise ratio and the anti-interference capability of the microphone are improved. In addition, the conductive material mentioned in this embodiment may be a metal or graphite, and the insulating material may be a plastic, rubber, silica gel, or ceramic, and this embodiment is only used to illustrate the technical solution of the present invention, and is not limited thereto.
It should be further noted that the transduction capacitor may be polarized by the back electrode of the polar plate 330 or the diaphragm polarization of the diaphragm 310; in addition, the microphone of the embodiment of the invention can be a differential pressure type microphone or a pressure type microphone. The present embodiment is only exemplary and not limiting of the implementation of the transducing capacitance and the acoustic principle of the microphone.
Further, a steel mesh 600 is further disposed in the accommodating cavity between the casing 100 and the sound-electricity conversion module 300, one surface of the steel mesh 600 is connected to the bottom of the casing 100, and the other surface of the steel mesh 600 is connected to the tension ring 311 of the diaphragm 310. The meshes of the steel mesh 600 are communicated with the sound inlet holes 110, and sound waves can enter the sound cavity from the meshes of the steel mesh 600 and the sound inlet holes 110 to vibrate the diaphragm 310. The steel mesh 600 plays a dustproof role on the one hand, prevents dust from entering the sound cavity from the sound inlet 110, reduces the mechanical performance of the diaphragm 310, and also plays a shielding role on the other hand, prevents the acoustoelectric conversion module 300 from being interfered by an external electromagnetic field, and further improves the signal-to-noise ratio of the embodiment.
Further, the impedance transformation module 400 includes a circuit board 410, the circuit board 410 is connected with the casing 100 to form a receiving cavity, and a ground line on the circuit board 410 is electrically connected with the casing 100, so that the alternating voltage generated by the acoustic-electric conversion module 300 can be applied to the components of the impedance transformation module 400. The circuit board 410 is provided with a field effect tube 411 and a first conductor 412, in the embodiment, the first conductor 412 is composed of a first copper foil exposed on the surface of the circuit board 410, the first conductor 412 is electrically connected with the grid of the field effect tube 411 and is arranged around the circumference of the field effect tube 411, the cross-sectional shape of one end of the noise reduction connector 500 electrically connected with the first conductor 412 is the same as that of the first conductor 412, so that the noise reduction connector 500 and the first conductor 412 can be in full contact and the shielding effect of the noise reduction connector 500 on the field effect tube 411 is enhanced. It should be noted that the first conductor 412 may also be a conductive connector such as a spring, a clip, a conductive foam, a socket, or a conductive slot, which is soldered on the circuit board 410 and electrically connected to the gate of the fet 411.
Further, the noise reduction connector 500 includes a spring 510 and a shielding cover 520, the shielding cover 520 is cylindrical, one end of the spring 510 is connected to the pole plate 330, the other end of the spring 510 is connected to the outer wall of the bottom of the shielding cover 520, one end of the shielding cover 520 close to the cover opening is connected to the first conductor 412, the pole plate 330 is electrically connected to the gate of the fet 411 through the spring 510 and the shielding cover 520, and the field effect transistor 411 is covered by the shielding cover 520 in an electromagnetic shielding chamber formed by the shielding cover 520 and the circuit board 410 (in this embodiment, the circuit board 410 is a double-layer circuit board, and a shielding region formed by a copper foil is disposed on a layer of the circuit board 410 far from the fet). The spring 510 and the shielding case 520 are fixed in the through hole 210 of the bracket 200, and the pole plate 330 of the acoustic-electric conversion module 300 can be electrically connected with the circuit board 410 of the impedance conversion module 400 only by sequentially attaching the acoustic-electric conversion module 300, the bracket 200 and the impedance conversion module 400 together, so that welding is not required, assembly is easy, and the acoustic-electric conversion module is suitable for production of automatic equipment and can improve production efficiency.
Further, an annular receiving groove 220 is formed at a side of the bracket 200 adjacent to the impedance transformation module 400, and a damper 700 and a sponge pad 800 are disposed in the receiving groove 220. The tank bottom of holding tank 220 and the one side butt of damping fin 700, the one side that damping fin 700 kept away from the tank bottom of holding tank 220 and the one side butt of foam-rubber cushion 800, and foam-rubber cushion 800 keeps away from the one side of damping fin 700 and contacts with circuit board 410. The packaged microphone is supported by the sponge cushion 800, the damping sheet 700 is reliably attached to the support 200, and the consistency of product quality is guaranteed.
Referring to fig. 3, 4 and 5, another embodiment of the present invention provides a microphone, in which the receiving groove 220 is formed around the circumference of the through hole 210, the connection post 230 is formed on the side of the bracket 200 close to the circuit board 410, the connection post 230 is circumferentially provided with a shielding cylinder 530, the inner wall of the shielding cylinder 530 is tightly connected to the outer wall of the connection post 230, and the shielding cylinder 520 is disposed in the shielding cylinder 530. A second conductor 413 is provided on the circuit board 410, and the second conductor 413 is electrically connected to the source of the field effect transistor 411. The second conductor 413 is a second copper foil exposed on the surface of the circuit board 410, the shape of the second copper foil is the same as the cross-sectional shape of the shielding cylinder 530, the shielding cylinder 530 is connected with the second conductor 413, and the shielding cylinder 530 is electrically connected with the source of the fet 411 through the second conductor 413. When the microphone is interfered by an electromagnetic field, an interference signal is coupled to the noise reduction connector 500 and the shielding cylinder 530, the same interference voltage is generated on the gate and the source of the field effect tube 411, the field effect tube 411 cannot be opened by the interference voltage applied to the gate and the source, and the field effect tube 411 is maintained in a cut-off state, so that the interference signal cannot trigger the impedance transformation module 400 to output an effective electric signal to a next-stage receiving circuit, and thus, the shielding cylinder 530 further enhances the anti-interference capability of the embodiment and can effectively improve the signal-to-noise ratio of the microphone. It should be further noted that in this embodiment, a first source pad 911, a first drain pad 912, and a first ground pad 913 are disposed on a side of the circuit board 410 away from the bracket 200, where the first source pad 911 is electrically connected to the source of the fet 411, the first source pad 911 is used to connect one pin of the first external resistor 921 and one pin of the first dc blocking capacitor 922, another pin of the first dc blocking capacitor 922 is electrically connected to a lower-stage receiving circuit, the first ground pad 913 is electrically connected to the ground line of the circuit board 410, the first ground pad 913 is used to connect another pin of the first external resistor 921, the first drain pad 912 is electrically connected to the drain of the fet 411, and the first drain pad 912 is used to connect a power supply; in addition, the second conductor 413 may also be a conductive connector such as a spring, a clip, a conductive foam, a socket, or a conductive slot soldered on the circuit board 410 and electrically connected to the source of the fet 411.
Referring to fig. 3, 4 and 6, another embodiment of the present invention provides a microphone including a case 100, a supporter 200, an acousto-electric conversion module 300, an impedance transformation module 400 and a noise reduction connector 500. The impedance transformation module 400 comprises a circuit board 410, a field effect transistor 411 is arranged on the circuit board 410, the circuit board 410 is connected with the shell 100 to form an accommodating cavity, the acoustic-electric conversion module 300, the noise reduction connector 500 and the bracket 200 are arranged in the accommodating cavity, and the acoustic-electric conversion module 300 and the impedance transformation module 400 are respectively arranged on two sides of the bracket 200; the sound-electricity conversion module 300 comprises a vibrating diaphragm 310, a gasket 320 and a polar plate 330, the noise reduction connector 500 comprises a spring 510 and a shielding cover 520, a through hole 210 is arranged on the support 200, the spring 510 and the shielding cover 520 penetrate through the through hole 210, the polar plate 330 is electrically connected with the grid electrode of the field effect tube 411 through the spring 510 and the shielding cover 520, the shielding cover 520 covers the field effect tube 411, and the vibrating diaphragm 310 is electrically connected with the ground wire of the circuit board 410 through the shell 100. An annular accommodating groove 220 is formed in one side, close to the impedance transformation module 400, of the support 200, the accommodating groove 220 is arranged in the circumferential direction around the shielding case 520, the accommodating groove 220 forms the connecting column 230 on the support 200, the shielding cylinder 530 is arranged on the connecting column 230, the inner wall of the shielding cylinder 530 is tightly connected with the outer wall of the connecting column 230, and the shielding case 520 is arranged in the shielding cylinder 530.
The circuit board 410 is provided with a second conductor 413, the second conductor 413 is electrically connected with the source of the field effect transistor 411 and the ground of the circuit board 410, specifically, the second conductor 413 is a second copper foil exposed on the surface of the circuit board 410, the shape of the second copper foil is the same as the cross-sectional shape of the shielding cylinder 530, the shielding cylinder 530 is connected with the second conductor 413, and the shielding cylinder 530 is electrically connected with the source of the field effect transistor 411 and the ground of the circuit board 410 through the second conductor 413, so that the shielding cylinder 530 can couple interference signals into the ground of the circuit board 410, thereby eliminating common mode interference, further enhancing the anti-interference capability of the embodiment, and effectively improving the signal-to-noise ratio of the microphone. It should be further noted that, in this embodiment, a second drain pad 914 and a second ground pad 915 are disposed on a side of the circuit board 410 away from the support 200, the second drain pad 914 is used to connect one pin of a second external resistor 931 and one pin of a second blocking capacitor 932, another pin of the second blocking capacitor 932 is electrically connected to a lower-stage receiving circuit, and another pin of the second external resistor 931 is connected to a power supply; in addition, the second conductor 413 may also be a conductive connector such as a spring, a clip, a conductive foam, a socket, or a conductive slot soldered on the circuit board 410 and electrically connected to the source of the fet 411 and the ground of the circuit board 410.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A microphone, comprising:
a housing;
the sound-electricity conversion module is arranged in the shell;
an impedance transformation module connected to the housing;
the noise reduction connector is arranged in the shell, one end of the noise reduction connector is electrically connected with the acoustic-electric conversion module, and the other end of the noise reduction connector covers the impedance transformation module and is electrically connected with the impedance transformation module.
2. The microphone of claim 1, further comprising a support disposed within the housing and between the acoustic-to-electrical conversion module and the impedance transformation module, wherein the noise reduction connector is disposed through the support, wherein the acoustic-to-electrical conversion module comprises a diaphragm, a gasket, and a pole plate, wherein the pole plate is connected to the support, the gasket is disposed between the diaphragm and the pole plate, and the noise reduction connector is electrically connected to the pole plate.
3. The microphone of claim 2, wherein a steel mesh is disposed between the housing and the acousto-electric conversion module, a tension membrane ring is disposed on the circumference of the diaphragm, and the steel mesh is connected to the housing and the tension membrane ring.
4. The microphone of claim 2, wherein the impedance conversion module comprises a circuit board, the circuit board is connected to the housing, a field effect transistor and a first conductor are disposed on the circuit board, the first conductor is electrically connected to a gate of the field effect transistor, and the noise reduction connector is electrically connected to the first conductor.
5. The microphone of claim 4 wherein the noise reduction connector comprises a spring and a shield, one end of the spring is electrically connected to the pole plate, the other end of the spring is connected to the shield, the shield is electrically connected to the first conductor, and the shield covers the FET.
6. The microphone of claim 5, wherein a receiving groove is formed in a surface of the bracket close to the impedance conversion module, a damping fin and a foam rubber pad are arranged in the receiving groove, and a groove bottom of the receiving groove, the damping fin, the foam rubber pad and the circuit board are connected in sequence.
7. The microphone of claim 6, wherein the receiving groove is disposed around a circumference of the shield case, the receiving groove forms a connecting post on the holder, a shield cylinder is disposed on the connecting post, a second conductive body is disposed on the circuit board, the shield cylinder is electrically connected to the circuit board through the second conductive body, and the shield case is disposed in the shield cylinder.
8. The microphone of claim 7 wherein the second electrical conductor is electrically connected to the source of the field effect transistor.
9. The microphone of claim 7 wherein the second electrical conductor and the source of the field effect transistor are electrically connected to a ground of the circuit board.
10. The microphone of claim 1 wherein the microphone is a diaphragm electret, back electret, pressure differential or pressure electret microphone.
CN202110475922.8A 2021-04-29 2021-04-29 Microphone Pending CN113163310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110475922.8A CN113163310A (en) 2021-04-29 2021-04-29 Microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110475922.8A CN113163310A (en) 2021-04-29 2021-04-29 Microphone

Publications (1)

Publication Number Publication Date
CN113163310A true CN113163310A (en) 2021-07-23

Family

ID=76872491

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110475922.8A Pending CN113163310A (en) 2021-04-29 2021-04-29 Microphone

Country Status (1)

Country Link
CN (1) CN113163310A (en)

Similar Documents

Publication Publication Date Title
US4516428A (en) Acceleration vibration detector
US8194895B2 (en) Condenser microphone
JP6053161B2 (en) Condenser microphone
US8600093B2 (en) Capacitor microphone
CN113141566A (en) Pickup assembly for microphone, bone conduction microphone and electronic product
US20090279730A1 (en) Shock-Absorbing Apparatus for a Ribbon Microphone Housing
CN113923568A (en) Bone voiceprint sensor and electronic equipment
JP2014011703A (en) Capacitor microphone
JP5075676B2 (en) Microphone
CN214675666U (en) Microphone
CN113163310A (en) Microphone
WO2023051005A1 (en) Coil-iron loudspeaker assembly and earphone
US9277328B2 (en) Condenser microphone
WO2001024573A1 (en) Microphone and video camera
CN210075577U (en) High-temperature-resistant waterproof microphone
CN215187372U (en) Electret microphone
CN212278465U (en) Bone conduction microphone
JP2009246635A (en) Capacitor microphone unit and capacitor microphone
JP2005244834A (en) Mounting structure of microphone unit and electronic device, and mounting method of microphone unit
CN2932894Y (en) SMD capacitor-type electret microphone
CN218679376U (en) Vibration sensor
CN218772417U (en) Speaker module and electronic equipment
CN218941329U (en) Bone conduction type polar film electret microphone
JP2004007427A (en) Electrostatic microphone transducer
CN214014520U (en) Bone conduction receiver and electronic device with same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination