CN104113807A - Polar ring coverage membrane-contained ultra-thin microphone - Google Patents
Polar ring coverage membrane-contained ultra-thin microphone Download PDFInfo
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- CN104113807A CN104113807A CN201410279319.2A CN201410279319A CN104113807A CN 104113807 A CN104113807 A CN 104113807A CN 201410279319 A CN201410279319 A CN 201410279319A CN 104113807 A CN104113807 A CN 104113807A
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- vibrating diaphragm
- polar ring
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- microphone
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Abstract
The invention relates to a polar ring coverage membrane-contained ultra-thin microphone comprising a housing, a gasket and a polar ring. A circular ring is formed in the center of the bottom of the housing; the gasket is pasted to the upper surface of the bottom of the housing; a vibrating diaphragm is pasted to the upper portion, of the portion, approaching the circular hole, of the gasket and a plastic ring is arranged at the upper surface of the other portion of the gasket. The outer wall of the polar ring is contacted to the inner wall of the plastic ring; and the bottom of the polar ring is contacted with the vibrating diaphragm. The capacitor formed by the insulating gasket between the polar ring coverage membrane and the housing is used for replacing the capacitor formed by the insulating gasket between the back polar plate and the vibrating ring coverage membrane, so that assembling becomes convenient; the cost is low; and the structure is simplified. Moreover, the vibrating diaphragm employs the polyacrylic resin with low density and high elasticity as the base body of the vibrating diaphragm and biological fibers, Kevlar and filler materials and the like are added into the base body, so that performances like the strength and the Young modulus and the like of the vibrating diaphragm can be improved and the tone quality of the microphone becomes perfect.
Description
Technical field
The present invention relates to a kind of microphone, relate in particular to the ultra-thin microphone of a kind of polar ring overlay film.
Background technology
Microphone, is again microphone, microphone, microphone, is the energy conversion device that voice signal is converted to the signal of telecommunication.As shown in Figure 1, traditional microphones comprises shell 1, shake ring 2-1, vibrating diaphragm 2-2, pad 3, back pole plate 4, moulds ring 5, polar ring 6, Air Filter 8 and PCB assembly.The described ring 2-1 that shakes is attached at shell 1 upper bottom surface, the ring 2-1 upper surface that shakes is pasted with vibrating diaphragm 2-2, vibrating diaphragm 2-2 upper surface is pasted with pad 3, described pad 3 is provided with back pole plate 4 near the part upper surface of shell circular hole, another part upper surface is provided with moulds ring 5, the described ring 5 inwall lower ends of moulding contact with back pole plate 4, and another part of its inwall contacts with polar ring 6, and polar ring 6 connects back pole plate 4 and PCB assembly up and down.The volume that such design makes microphone is larger, structure is more complicated, cost is higher.
And vibrating diaphragm in microphone is microphone induction sound and the primary clustering that is converted to electric energy signal, therefore, the material of vibrating diaphragm and mechanism design have determined microphone tonequality characteristic.
Summary of the invention
The object of the invention is to exist above-mentioned problem for existing microphone, provide a kind of structure simpler, assemble the ultra-thin microphone of polar ring overlay film more convenient, that tonequality better, cost is lower.
The technical scheme that the present invention solves its technical problem employing is: the ultra-thin microphone of a kind of polar ring overlay film, comprise shell, pad and polar ring, described outer casing bottom center is provided with a circular hole, described pad is attached at outer casing bottom upper surface, described pad is pasted with vibrating diaphragm near the part upper surface of circular hole, another part upper surface is provided with moulds ring, and described polar ring outer wall is attached at moulds ring inwall, and polar ring bottom surface contacts with vibrating diaphragm; Wherein, described vibrating diaphragm is made up of following parts by weight: polyacrylic resin: 50-80 part, biological fiber: 8-15 part, anti-elater: 8-15 part, filler: 10-15 part, processing aid: 1-5 part.
Vibrating diaphragm is microphone induction sound and the primary clustering that is converted to electric energy signal, and its material and mechanism design have determined microphone tonequality characteristic, therefore, add the different component of different proportion can produce different acoustical qualities in vibrating diaphragm.For making microphone playback frequency band wide as far as possible, just need vibrating diaphragm as far as possible larger than spring rate E/ ρ, wherein E represents the modulus of elasticity of diaphragm materials, ρ represents the density of diaphragm materials.Reduce the density of material so the modulus of elasticity of material should be increased in the selection of diaphragm materials as far as possible.Therefore, the present invention selects that density is low, matrix than the high polyacrylic resin of bullet rate as diaphragm materials, but also high-modulus, high strength and low-density anti-elater, biological fiber, filler etc. in matrix, are added, the ratio spring rate E/ ρ of the diaphragm materials of microphone of the present invention is improved a lot, microphone playback frequency band is broadened.In addition, adding of anti-elater, biological fiber, filler etc. can make vibrating diaphragm have suitable internal damping, and suitable internal damping can make frequency response curve smoother, improves tonequality.
Further, described biological fiber is the chitin biological fiber extracting from shell-fish marine animal.Although add the chitin biological fiber extracting from shell-fish marine animal the frequency response curve of microphone to be improved few in the matrix of vibrating diaphragm, but it is plentiful that microphone audio frequency obviously becomes middle pitch, sound is natural, clear, can embody the meat feeling of vocal cord vibration while particularly playing song.
Further, described anti-elater is aramid fiber.Aramid fiber has the strength and modulus of superelevation, be respectively 5-6 times and 2-3 times of steel wire, and its weight is very light, only has 0.2 left and right of steel wire.In vibrating diaphragm matrix, add anti-elater aramid fiber, not only can strengthen the strength and modulus of vibrating diaphragm, can also improve the tonequality of microphone, bring a kind of simple and honest middle band fine and smooth, bold middle with the soft sense of hearing to people.And anti-elater joins in vibrating diaphragm matrix together with biological fiber, can make the tonequality of microphone more plentiful, stereovision is more obvious, and granular sensation is stronger.But, add anti-elater too much or very little all can not play good effect to the improvement of microphone tonequality, therefore, the present invention, according to the composition of vibrating diaphragm matrix and weight ratio thereof, is controlled at the addition of anti-elater between 8-15 part.
Further, described filler is one or more in carbon fiber, boron fibre, graphite, whisker crystalline substance.These packing densities are low, and can improve the ratio spring rate of vibrating diaphragm.Especially carbon fiber and boron fibre, has higher Young's modulus and intensity, and internal damping is larger, can make multilayer structure with vibrating diaphragm basis material, increases flexible, and can play certain improvement effect to the tonequality of microphone.
Further, described processing aid is one or both in atoleine, chlorinated paraffin wax.Adding of processing aid atoleine of the present invention, chlorinated paraffin wax, can improve the processing fluidity of vibrating diaphragm matrix.
Further, the preparation method of described vibrating diaphragm comprises the following steps:
S1: take raw material by the constituent of above-mentioned vibrating diaphragm and parts by weight thereof, then raw material is dropped in high-speed mixer and fully mixed, from high-speed mixer, discharge, put into double screw extruder feed hopper, be fed in double screw extruder by feed hopper;
S2: above-mentioned material is extruded from the head of double screw extruder, then is obtained pellet by granulator granulation, wherein, double screw extruder Temperature Setting between 190 DEG C-220 DEG C, feeding frequency 25-35 hertz, rotating speed 280-320 rev/min;
S3: above-mentioned pellet is dropped in extruder and extrudes and obtain vibrating diaphragm section bar, then cooling in mould vibrating diaphragm section bar, vacuum forming are obtained to final products vibrating diaphragm.
Further, described microphone also comprises Air Filter, and described Air Filter is attached at shell bottom surface.
Further, described microphone also comprises PCB assembly, and described PCB assembly is supported and be buckled in enclosure by polar ring.
Further, described in mould ring and leave space with shell, mould ring upper end and PCB assembly and leave space.
Further, described PCB assembly also comprises field effect transistor, the first electric capacity, the second electric capacity, pcb board and contact pin, described field effect transistor is attached at pcb board lower surface, field effect transistor upper surface contacts with contact pin lower surface, described the first electric capacity is attached at pcb board lower surface, a part for described the second electric capacity is attached at pcb board lower surface, and another part is attached at contact pin lower surface, and described contact pin inserts on pcb board.
Compared with prior art, the present invention has the following advantages:
1. the electric capacity that between polar ring overlay film and shell, insulation spacer forms for the present invention replaces the electric capacity of back pole plate and the insulation spacer formation between ring overlay film of shaking, and makes to assemble convenient, and cost is lower, and structure is simpler.
2. the present invention adopts that density is low, matrix than the high polyacrylic resin of bullet rate as vibrating diaphragm, and in matrix, has added biological fiber, anti-elater and filler etc. to improve the performance such as film strength, Young's modulus of shaking, and improves the tonequality of microphone.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of traditional microphones.
In figure, 1, shell; 2-1, ring shakes; 2-2, vibrating diaphragm; 3, pad; 4, back pole plate; 5, mould ring; 6, polar ring; 7, pcb board; 8, Air Filter; 9, FET; 10, the first electric capacity; 11, the second electric capacity; 12, contact pin.
Fig. 2 is overall structure schematic diagram of the present invention.
In figure, 1, shell; 2, pad; 3, vibrating diaphragm; 4, Air Filter; 5, mould ring; 6, polar ring; 7, FET; 8, the first electric capacity; 9, the second electric capacity; 10, pcb board; 11, contact pin.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Please refer to Fig. 2, in one embodiment of the invention, the ultra-thin microphone of polar ring overlay film, it comprises shell 1, pad 2, vibrating diaphragm 3, Air Filter 4, moulds ring 5, polar ring 6, PCB assembly; Described pad 2, vibrating diaphragm 3, mould ring 5, polar ring 6, PCB assembly are positioned at shell 1 inside; Air Filter 4 is positioned at shell 1 outside.
Air Filter 4 is attached at shell 1 bottom surface, for the protection of microphone, prevents that dust from falling on vibrating diaphragm, prevents that exterior object from puncturing vibrating diaphragm, also has the waterproof action of short time.
Shell 1 is cylinder shape, and its effect is the strutting piece of whole microphone, and other part is encapsulated in shell 1, and shell 1 can also play the effect of electromagnetic shielding.In addition, the bottom of shell 1 is provided with a manhole, and sound propagates into the inside of microphone by this through hole.In addition, shell 1 upper bottom surface replaces the effect of the back pole plate in traditional microphones as another electrode of electric capacity.
Pad 2 is annular, is attached at shell 1 upper bottom surface, and pad 2 is pasted with vibrating diaphragm 3 near the part upper surface of circular hole, and another part upper surface is provided with moulds ring 5, and the effect of pad 2 is isolation vibrating diaphragm 3 and shell 1, for the vibration of vibrating diaphragm 3 provides a space.
Vibrating diaphragm 3 is extremely quiet plastic films, evaporates one deck proof gold film on it, and then, after high voltage electric field electret, the charges of different polarity are had respectively on two sides stationed, between this vibrating diaphragm 3 and shell 1 upper base surface, forms an electric capacity.In the time that sound imports into, vibrating diaphragm 3 vibrates with the transmission of sound wave, now the capacitance between vibrating diaphragm 3 and shell 1 also changes with sound, thereby has produced the alternating voltage signal changing with sound wave, has so just completed sound and be converted to the process of the signal of telecommunication.The size of change in voltage, has reflected the power of extraneous acoustic pressure, and this change in voltage frequency has reflected the frequency of external sound.
Mould ring 5 and be arranged between shell 1 and polar ring 6, leave space with shell 1, upper end and PCB assembly leave space.Mould the effect that ring 5 plays an insulation, avoided forming electric capacity between shell 1 and polar ring 6, thereby affected microphone.
Polar ring is connecting PCB board 10 and vibrating diaphragm 3 Shang Xia 6, and its outer wall is attached at moulds ring 5 inwalls, and its bottom surface contacts with vibrating diaphragm 3.First polar ring 6 plays the effect of a support, in addition the signal of telecommunication is sent on pcb board 10.
PCB assembly supports and is buckled in shell 1 inside by polar ring 6, also plays the effect of a fixation kit simultaneously.PCB assembly comprises field effect transistor (FET) 7, the first electric capacity 8, the second electric capacity 9, pcb board 10 and contact pin 11, FET7 is attached at pcb board 10 lower surfaces, FET7 upper surface contacts with contact pin 11 lower surfaces, described the first electric capacity 8 is attached at pcb board 10 lower surfaces, a part for described the second electric capacity 9 is attached at pcb board 10 lower surfaces, another part is attached at contact pin 11 lower surfaces, and described contact pin 11 inserts on pcb board.
Wherein FET7 is the effect of playing impedance transformation and amplification, is mainly impedance transformation.Utilize the high input impedance of FET to realize impedance transformation, to obtain higher FET grid voltage between source electrodes, thereby obtain larger output signal; Contact pin 11 can be connected transducer and carry out the transmission of signal with external equipment.
Wherein, above-mentioned vibrating diaphragm 3 is made up of following parts by weight: polyacrylic resin: 50-80 part, biological fiber: 8-15 part, anti-elater: 8-15 part, filler: 10-15 part, processing aid: 1-5 part.
Table 1: the constituent of embodiment of the present invention 1-4 vibrating diaphragm and parts by weight thereof
Embodiment 1:
Take raw material by the constituent of the vibrating diaphragm of embodiment in table 11 and parts by weight thereof; then raw material is dropped in high-speed mixer and fully mixed; after discharging, put into double screw extruder feed hopper from high-speed mixer; be fed in double screw extruder by feed hopper; by double screw extruder Temperature Setting, between 190 DEG C DEG C, feeding FREQUENCY CONTROL is at 25 hertz, and rotating speed is controlled at 280 revs/min; extrude from the head of double screw extruder, then obtain pellet by granulator granulation.Pellet drops in extruder again and extrudes and obtain vibrating diaphragm section bar, finally cooling in mould vibrating diaphragm section bar, vacuum forming is obtained to final products vibrating diaphragm.
Embodiment 2:
Take raw material by the constituent of the vibrating diaphragm of embodiment in table 12 and parts by weight thereof; then raw material is dropped in high-speed mixer and fully mixed; after discharging, put into double screw extruder feed hopper from high-speed mixer; be fed in double screw extruder by feed hopper; by double screw extruder Temperature Setting, between 200 DEG C, feeding FREQUENCY CONTROL is at 28 hertz, and rotating speed is controlled at 295 revs/min; extrude from the head of double screw extruder, then obtain pellet by granulator granulation.Pellet drops in extruder again and extrudes and obtain vibrating diaphragm section bar, finally cooling in mould vibrating diaphragm section bar, vacuum forming is obtained to final products vibrating diaphragm.
Embodiment 3:
Take raw material by the constituent of the vibrating diaphragm of embodiment in table 13 and parts by weight thereof; then raw material is dropped in high-speed mixer and fully mixed; after discharging, put into double screw extruder feed hopper from high-speed mixer; be fed in double screw extruder by feed hopper; by double screw extruder Temperature Setting, between 210 DEG C, feeding FREQUENCY CONTROL is at 32 hertz, and rotating speed is controlled at 310 revs/min; extrude from the head of double screw extruder, then obtain pellet by granulator granulation.Pellet drops in extruder again and extrudes and obtain vibrating diaphragm section bar, finally cooling in mould vibrating diaphragm section bar, vacuum forming is obtained to final products vibrating diaphragm.
Embodiment 4:
Take raw material by the constituent of the vibrating diaphragm of embodiment in table 14 and parts by weight thereof; then raw material is dropped in high-speed mixer and fully mixed; after discharging, put into double screw extruder feed hopper from high-speed mixer; be fed in double screw extruder by feed hopper; by double screw extruder Temperature Setting, between 220 DEG C, feeding FREQUENCY CONTROL is at 35 hertz, and rotating speed is controlled at 320 revs/min; extrude from the head of double screw extruder, then obtain pellet by granulator granulation.Pellet drops in extruder again and extrudes and obtain vibrating diaphragm section bar, finally cooling in mould vibrating diaphragm section bar, vacuum forming is obtained to final products vibrating diaphragm.
The vibrating diaphragm that embodiment of the present invention 1-4 is made carries out performance test, and test result is as shown in table 2.
The vibrating diaphragm the performance test results that table 2: embodiment of the present invention 1-4 makes
As known from Table 2, the vibrating diaphragm elastic modulus E that embodiment of the present invention 1-4 makes is greater than 12GPa, and density p is at 1.0-1.5gcm
-3between, therefore the ratio spring rate E/ ρ of diaphragm materials is greater than 10m
2s
-3, the microphone playback frequency band of the present invention making is wider.
Application Example:
The diaphragm materials making in embodiment of the present invention 1-4 is applied in the ultra-thin microphone of polar ring overlay film of the present invention.
Control group:
Commercially available common microphone.
The ultra-thin microphone of polar ring overlay film of the present invention and commercially available common microphone are carried out to acoustical testing, and test result is as shown in table 3.
Table 3: the ultra-thin microphone tonequality of polar ring overlay film of the present invention test result
| Microphone | Tonequality |
| Application Example 1 | 4.6 |
| Application Example 2 | 4.8 |
| Application Example 3 | 4.4 |
| Application Example 4 | 4.5 |
| Control group | 2.8 |
Tonequality is that 10 people groups divide the score mean value of the rear each group of scoring by after testing by 1-5, and 5 are divided into full marks.
As known from Table 3, the diaphragm materials that the ultra-thin microphone of polar ring overlay film of the present invention adopts is taking polyacrylic resin as matrix, and in matrix, added anti-elater, biological fiber and filler etc., makes the tonequality of microphone more plentiful, and stereovision is more obvious, and granular sensation is stronger.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made a detailed description and has quoted as proof some specific embodiments, to those skilled in the art, only otherwise it is obvious leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (10)
1. the ultra-thin microphone of polar ring overlay film, comprise shell, pad and polar ring, it is characterized in that, described outer casing bottom center is provided with a circular hole, described pad is attached at outer casing bottom upper surface, and described pad is pasted with vibrating diaphragm near the part upper surface of circular hole, and another part upper surface is provided with moulds ring, described polar ring outer wall is attached at moulds ring inwall, and polar ring bottom surface contacts with vibrating diaphragm; Wherein, described vibrating diaphragm is made up of following parts by weight: polyacrylic resin: 50-80 part, biological fiber: 8-15 part, anti-elater: 8-15 part, filler: 10-15 part, processing aid: 1-5 part.
2. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, described biological fiber is the chitin biological fiber extracting from shell-fish marine animal.
3. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, described anti-elater is aramid fiber.
4. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, described filler is one or more in carbon fiber, boron fibre, graphite, whisker crystalline substance.
5. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, described processing aid is one or both in atoleine, chlorinated paraffin wax.
6. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, the preparation method of described vibrating diaphragm comprises the following steps:
S1: take raw material by the constituent of the vibrating diaphragm described in claim 1 and parts by weight thereof, then raw material is dropped in high-speed mixer and fully mixed, from high-speed mixer, discharge, put into double screw extruder feed hopper, be fed in double screw extruder by feed hopper;
S2: above-mentioned material is extruded from the head of double screw extruder, then is obtained pellet by granulator granulation, wherein, double screw extruder Temperature Setting between 190 DEG C-220 DEG C, feeding frequency 25-35 hertz, rotating speed 280-320 rev/min;
S3: above-mentioned pellet is dropped in extruder and extrudes and obtain vibrating diaphragm section bar, then cooling in mould vibrating diaphragm section bar, vacuum forming are obtained to final products vibrating diaphragm.
7. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, also comprise Air Filter, described Air Filter is attached at shell bottom surface.
8. the ultra-thin microphone of a kind of polar ring overlay film according to claim 1, is characterized in that, also comprises PCB assembly, and described PCB assembly is supported and be buckled in enclosure by polar ring.
9. the ultra-thin microphone of a kind of polar ring overlay film according to claim 8, is characterized in that, described in mould ring and leave space with shell, mould ring upper end and PCB assembly and leave space.
10. the ultra-thin microphone of a kind of polar ring overlay film according to claim 8, it is characterized in that, PCB assembly also comprises field effect transistor, the first electric capacity, the second electric capacity, pcb board and contact pin, described field effect transistor is attached at pcb board lower surface, field effect transistor upper surface contacts with contact pin lower surface, and described the first electric capacity is attached at pcb board lower surface, and a part for described the second electric capacity is attached at pcb board lower surface, another part is attached at contact pin lower surface, and described contact pin inserts on pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279319.2A CN104113807A (en) | 2014-06-20 | 2014-06-20 | Polar ring coverage membrane-contained ultra-thin microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279319.2A CN104113807A (en) | 2014-06-20 | 2014-06-20 | Polar ring coverage membrane-contained ultra-thin microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104113807A true CN104113807A (en) | 2014-10-22 |
Family
ID=51710416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410279319.2A Pending CN104113807A (en) | 2014-06-20 | 2014-06-20 | Polar ring coverage membrane-contained ultra-thin microphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554600A (en) * | 2016-03-09 | 2016-05-04 | 山东共达电声股份有限公司 | Electret microphone |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956661Y (en) * | 2006-09-30 | 2007-10-03 | 潍坊共达电讯有限公司 | Waterproof moisture-proof electret condenser microphone |
| CN101711003A (en) * | 2009-07-27 | 2010-05-19 | 陈少琼 | Moving type sound box |
| US20100189300A1 (en) * | 2009-01-28 | 2010-07-29 | Funai Electric Co., Ltd. | Microphone Unit |
| CN103561373A (en) * | 2013-09-27 | 2014-02-05 | 宁波鑫丰泰电器有限公司 | Front-pole type capacitor microphone |
| CN103581813A (en) * | 2013-09-27 | 2014-02-12 | 宁波生大电子有限公司 | High-temperature-resistant patch microphone |
| CN103763669A (en) * | 2013-10-18 | 2014-04-30 | 柯礼军 | High temperature-resistant surface-mounting microphone |
-
2014
- 2014-06-20 CN CN201410279319.2A patent/CN104113807A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956661Y (en) * | 2006-09-30 | 2007-10-03 | 潍坊共达电讯有限公司 | Waterproof moisture-proof electret condenser microphone |
| US20100189300A1 (en) * | 2009-01-28 | 2010-07-29 | Funai Electric Co., Ltd. | Microphone Unit |
| CN101711003A (en) * | 2009-07-27 | 2010-05-19 | 陈少琼 | Moving type sound box |
| CN103561373A (en) * | 2013-09-27 | 2014-02-05 | 宁波鑫丰泰电器有限公司 | Front-pole type capacitor microphone |
| CN103581813A (en) * | 2013-09-27 | 2014-02-12 | 宁波生大电子有限公司 | High-temperature-resistant patch microphone |
| CN103763669A (en) * | 2013-10-18 | 2014-04-30 | 柯礼军 | High temperature-resistant surface-mounting microphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554600A (en) * | 2016-03-09 | 2016-05-04 | 山东共达电声股份有限公司 | Electret microphone |
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Application publication date: 20141022 |
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