CN210694279U - Bidirectional regulation directive property microphone - Google Patents

Abstract

A bi-directionally adjustable directional microphone, comprising: the microphone comprises a first sound mixing paper, a microphone shell, a microphone main body, a fixed pressing plate and a second sound mixing paper, wherein the microphone shell is arranged on the fixed pressing plate, the microphone main body is contained in the microphone shell and the fixed pressing plate, the first sound mixing paper is arranged on the microphone shell, and the second sound mixing paper is arranged on the fixed pressing plate; the microphone comprises a microphone shell, a first tone tuning paper, a second tone tuning paper, a fixed pressing plate and a pressing plate, wherein one end of the microphone shell is provided with a plurality of microphone picking holes, the first tone tuning paper is used for covering the plurality of microphone picking holes, the other end of the microphone shell is provided with a mounting opening, the fixed pressing plate is used for covering the mounting opening, the pressing plate picking holes are formed in the fixed pressing plate, the second tone tuning paper is used for covering the pressing plate picking holes, and the fixed pressing plate is; the utility model discloses it is more convenient to have the equipment, and stability is relatively good, is difficult to take place to rock, and the directive property that can two-way regulation miaow head and the sensitivity of picking up sound are relatively good.

Description

Bidirectional regulation directive property microphone

Technical Field

The utility model relates to a miaow head technical field especially relates to a directive property miaow head of two-way regulation.

Background

At present, with the development of the technology level and the improvement of the living standard of people, various high-technology products are widely applied to the daily life and leisure and entertainment activities of people, such as widely used microphones. The microphone head is an energy conversion device for converting a sound signal into an electric signal, is a device just opposite to the loudspeaker, is two terminals of sound equipment, and is used for inputting the microphone head and outputting the loudspeaker, namely a microphone, a microphone and a microphone.

Generally, microphones can be roughly classified into non-directional microphones and single-directional microphones according to their directional characteristics and sound reception angles, wherein microphones with different directivities are suitable for different sound reception environments and sound reception requirements. For example, a unidirectional microphone is suitable for sound reception of singing performances, while a non-directional microphone is suitable for sound reception while speaking. The existing microphone has a fixed form, and the directivity of the microphone cannot be adjusted after the microphone is assembled, so that the microphone has a poor sound pickup effect; when the sound that the user of service produced is less, can not effectual gathering the sound, influenced the effect that the miaow head picked up the sound to the miaow head is installed on the product after, takes place to rock easily and produces noise.

However, the existing microphone still has the following problems: the equipment is inconvenient, and stability is than poor, takes place easily to rock, can not adjust the directive property of miaow head and pick up the sensitivity of sound poor.

Disclosure of Invention

Based on this, it is more convenient to need to design an equipment, and stability is relatively good, is difficult to take place to rock, can the directive property of two-way regulation miaow head and the better two-way regulation directive property miaow head of sensitivity of picking up sound.

A bi-directionally adjustable directional microphone, comprising: the microphone comprises a first tone tuning paper, a microphone shell, a microphone main body, a fixed pressing plate and a second tone tuning paper, wherein the microphone shell is arranged on the fixed pressing plate, the microphone main body is accommodated in the microphone shell and the fixed pressing plate, the first tone tuning paper is arranged on the microphone shell, and the second tone tuning paper is arranged on the fixed pressing plate;

the microphone comprises a microphone shell, a first tone tuning paper, a second tone tuning paper, a fixed pressing plate and a pressing plate, wherein one end of the microphone shell is provided with a plurality of microphone picking holes, the first tone tuning paper is used for covering the plurality of microphone picking holes, the other end of the microphone shell is provided with an installation opening, the fixed pressing plate is used for covering the installation opening, the fixed pressing plate is provided with a pressing plate picking hole, the second tone tuning paper is used for covering the pressing plate picking hole, and the fixed pressing plate is provided with two positioning holes;

the microphone main body comprises a dustproof net, a plastic ring, a voice coil expander, a fixed gasket, a gold-plated vibrating diaphragm, a polar plate and a PCB (printed Circuit Board), the dustproof net is arranged on the inner side wall of the microphone shell and is used for covering the microphone sound pickup hole, the plastic ring is arranged in the microphone shell, the outer side wall of the plastic ring is attached to the inner side wall of the microphone shell, the plastic ring is attached to one side surface of the dustproof net far away from the microphone sound pickup hole, the voice coil expander, the fixed gasket, the vibrating diaphragm gold-plated, the polar plate and the PCB are sequentially overlapped upwards in the plastic ring, the plastic ring is respectively connected with the voice coil expander, the fixed gasket, the gold-plated vibrating diaphragm, the polar plate and the PCB, the voice coil expander is arranged on the polar plate, and a connecting hole, the sound expansion hole, the connecting hole and the pressing plate sound picking hole are communicated with each other, two connecting columns are arranged on the PCB, the two connecting columns penetrate through the two positioning holes respectively, and the connecting columns are electrically connected through a conducting wire.

In one embodiment, a fixing ring is arranged on the microphone shell, the fixing ring has a circular ring-shaped structure, and the first tuning paper is embedded in the fixing ring.

In one embodiment, the fixing ring is provided with a fixing opening.

In one embodiment, two rubber anti-slip strips are sleeved on the microphone shell, and each rubber anti-slip strip is of a round strip-shaped structure.

In one embodiment, the inner ring of the voice coil expander is provided with chamfered corners.

In one embodiment, the sound amplifying ring is provided with a sound inlet and a sound outlet, the sound inlet is arranged at one end of the sound amplifying ring close to the dust screen, the sound outlet is arranged at one end of the sound amplifying ring far away from the dust screen, and the sound outlet is larger than the sound inlet.

In one embodiment, the sound diffusing holes are respectively provided with an inner opening and an outer opening, the inner opening faces one side of the gold-plated vibrating diaphragm, the outer opening faces one side of the PCB, and the inner opening is larger than the outer opening.

In one embodiment, the fixed pressing plate is provided with a positioning installation groove, the positioning installation groove is communicated with the pressing plate sound pickup hole, the second tuning paper is embedded into the positioning installation groove, and the fixed pressing plate is provided with a positioning groove.

In one embodiment, the plastic ring has a circular ring structure, and the inner side wall of the plastic ring is coated with non-adhesive.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:

(1) the utility model discloses a first tuning paper is used for the cover to establish a plurality of miaow head sound collecting holes in the two-way regulation directive property miaow head, the second tuning paper is used for the cover to establish the clamp plate sound collecting hole, the number of piles of tuning paper on the sound collecting hole through changing miaow head both ends, the number of piles of tuning paper at messenger miaow head both ends is different, the number of piles of tuning paper increases, the effect of separation sound is better, the time that extension sound reachs the sound collecting hole has, thereby change the directive property of miaow head, reach the effect of two-way regulation miaow head directive property, and the tuning paper sets up the outside at the miaow head, can conveniently change and attached, conveniently adjust the number of piles of tones, the.

(2) The utility model discloses an attached on the side that keeps away from the miaow head and pick up the sound hole of public address circle in two-way regulation directive property miaow head, the sound amplification hole has been seted up on the polar plate, the internal orifice that is greater than inlet and public address hole through the sound outlet that sets up the voice coil loudspeaker voice coil is greater than the outer mouthful, make the sound wave that spreads into in the miaow head expand, thereby reach the effect of amplifying sound, make gilding vibrating diaphragm shake more easily, the sensitivity that the miaow head picked up sound has been improved, when external environment's sound is less, the miaow head also can effectually pick up sound.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a directional microphone with bidirectional adjustment according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of the two-way directional adjustment microphone shown in fig. 1 along line a-a;

fig. 3 is a schematic view of another view angle of the bidirectional directional adjusting microphone shown in fig. 1;

fig. 4 is an exploded view of a directional microphone with bidirectional adjustment according to an embodiment of the present invention;

fig. 5 is a schematic view of a sound amplification ring structure of a bidirectional adjusting directional microphone according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, a directional microphone for bidirectional adjustment includes: the microphone comprises a first tone tuning paper, a microphone shell, a microphone main body, a fixed pressing plate and a second tone tuning paper, wherein the microphone shell is arranged on the fixed pressing plate, the microphone main body is accommodated in the microphone shell and the fixed pressing plate, the first tone tuning paper is arranged on the microphone shell, and the second tone tuning paper is arranged on the fixed pressing plate; the first tuning paper is used for covering the plurality of microphone picking holes, has the function of adjusting microphone directivity, and can prolong the time of sound reaching the picking holes by changing the number of layers of the tuning paper so as to achieve the function of adjusting microphone directivity; the microphone comprises a microphone shell, a fixed pressing plate, second tuning paper, a microphone shell and a microphone shell, wherein the microphone shell is provided with a sound collecting hole, the fixed pressing plate is used for covering the sound collecting hole, the fixed pressing plate is provided with a pressing plate sound collecting hole, the second tuning paper is used for covering the sound collecting hole, the fixed pressing plate is provided with two positioning holes, the second tuning paper has the effect of adjusting microphone directivity, and the number of layers of the tuning paper is changed, so that the time of sound reaching the sound collecting hole is prolonged, and the effect of adjusting microphone directivity is achieved; the microphone main body comprises a dust screen, a plastic ring, a voice expansion coil, a fixed gasket, a gold-plated vibrating diaphragm, a polar plate and a PCB (printed Circuit Board), the dust screen is arranged on the inner side wall of the microphone shell and used for covering the microphone sound pickup hole, the plastic ring is arranged in the microphone shell, the outer side wall of the plastic ring is attached to the inner side wall of the microphone shell, the plastic ring is attached to one side face, away from the microphone sound pickup hole, of the dust screen, the voice expansion coil is attached to one side face, away from the microphone sound pickup hole, of the dust screen, and the voice expansion coil expands sound waves transmitted into the microphone, so that the effect of amplifying the sound is achieved, the gold-plated vibrating diaphragm vibrates more easily, and the sensitivity of the microphone for picking up the sound is improved; the microphone is characterized in that a voice expansion coil, a fixed gasket, a gold-plated vibrating diaphragm, a polar plate and a PCB are sequentially and upwards superposed in the plastic ring, the plastic ring is respectively connected with the voice expansion coil, the fixed gasket, the gold-plated vibrating diaphragm, the polar plate and the PCB, and the polar plate is provided with a sound expansion hole which expands sound waves transmitted into the microphone, so that the sound amplification effect is achieved, the gold-plated vibrating diaphragm is easier to vibrate, and the sensitivity of the microphone for picking up the sound is improved; the PCB is provided with two connecting columns, the two connecting columns respectively penetrate through the two positioning holes, and the connecting columns are electrically connected through a lead; the utility model discloses it is more convenient to have the equipment, and stability is relatively good, is difficult to take place to rock, and the directive property that can two-way regulation miaow head and the sensitivity of picking up sound are relatively good.

For better explaining the bidirectional directional adjustment microphone to better understand the concept of the bidirectional directional adjustment microphone, please refer to fig. 1 to 5, a bidirectional directional adjustment microphone 10 includes a first tuning paper 100, a microphone housing 200, a microphone main body 300, a fixed platen 400 and a second tuning paper 500, the microphone housing 200 is disposed on the fixed platen 400, the microphone housing 200 has the function of protecting the microphone main body 300, preventing internal components from being damaged, and improving the stability of the microphone; the microphone main body 300 is accommodated in the microphone housing 200 and the fixing pressure plate 400, and the fixing pressure plate 400 has an effect of fixing the microphone main body 300, so that the microphone main body 300 is prevented from being separated from the inside of the microphone housing 200, and internal elements of the microphone are not prone to shaking in the using process, so that the generation of microphone noise is reduced, and the overall stability of the microphone is improved; the first tuning paper 100 is arranged on the microphone shell 200, has the effect of adjusting microphone directivity, and can prolong the time of sound reaching the sound pickup hole by changing the number of layers of the tuning paper so as to achieve the effect of adjusting microphone directivity; the second tuning paper 500 set up in on the fixed clamp plate 400, the second tuning paper has the effect of adjusting the miaow directive property, through the number of piles that changes the tuning paper to the time that the extension sound arrived the sound picking hole reaches the effect of adjusting the miaow directive property.

Referring to fig. 1 to 5, one end of the microphone housing 200 is provided with a plurality of microphone pickup holes 210, the first tuning paper 100 is used for covering the plurality of microphone pickup holes 210, and the microphone pickup holes 210 have a function of picking up sound, so that sound can be effectively transmitted into the microphone through the microphone pickup holes 210, and the effect of the microphone in picking up sound is improved; the other end of the microphone housing 200 is provided with an installation opening (not shown), the fixed pressing plate 400 is used for covering the installation opening, the installation opening has the function of fixing the fixed pressing plate 400, the fixed pressing plate 400 is prevented from falling off, the stability of the microphone is improved, the installation opening is convenient for installing the microphone main body 300, the production efficiency of the microphone is improved, and the labor cost is reduced; the fixed pressing plate 400 is provided with a pressing plate sound picking hole 410, the second tuning paper 500 is used for covering the pressing plate sound picking hole 410, the pressing plate sound picking hole 410 has a sound picking function, sound can be effectively transmitted into the interior of the microphone through the pressing plate sound picking hole 410, and the sound picking effect of the microphone is improved; two positioning holes 420 are formed in the fixed pressing plate.

Referring to fig. 1 to 5, the microphone main body 300 includes a dust screen 310, a plastic ring 320, a sound amplifying ring 330, a fixing washer 340, a gold-plated vibrating diaphragm 350, a polar plate 360 and a PCB 370, the dust screen 310 is disposed on an inner sidewall of the microphone case 200, the dust screen 310 is used for covering the microphone sound collecting hole 210, and the dust screen 310 has a dust-proof function, so as to prevent dust from entering the microphone, so that the microphone cannot normally operate, and improve the stability of the microphone; the plastic ring 320 is arranged in the microphone shell 200, the outer side wall of the plastic ring 320 is attached to the inner side wall of the microphone shell 200, the plastic ring 320 is attached to one side surface of the dust screen 310 far away from the microphone sound pickup hole 210, and the plastic ring 320 has the function of fixing microphone internal elements and prevents the microphone internal elements from shaking to influence the sound quality of the microphone; the voice amplification coil 330 is attached to a side surface of the dust screen 310 away from the microphone sound pickup hole 210, and the voice amplification coil 330 has a function of amplifying sound, so that smaller sound can be amplified, when the sound contacts the gold-plated vibrating diaphragm 350, the gold-plated vibrating diaphragm 350 is more easily vibrated, the microphone is more sensitive to pick up sound, and the sound quality of the microphone is improved; the voice amplification coil 330, the fixed gasket 340, the gold-plated vibrating diaphragm 350, the pole plate 360 and the PCB 370 are sequentially superposed in the plastic ring 320, the plastic ring 320 is respectively connected with the voice amplification coil 330, the fixed gasket 340, the gold-plated vibrating diaphragm 350, the pole plate 360 and the PCB 370, the pole plate 360 is provided with a voice amplification hole 361, and the pole plate 360 is used for converting a voice signal into an electric signal; the PCB 370 is provided with a connecting hole 371, and the PCB 370 is used for controlling the output of an electrical signal; the sound expansion hole 361, the connection hole 371 and the pressing plate sound pickup hole 410 are communicated with each other, the sound expansion hole 361 has a sound expansion effect, small sound can be amplified, when the sound contacts the gold-plated vibrating diaphragm 350, the gold-plated vibrating diaphragm 350 is more easily vibrated, the sensitivity of the microphone for picking up the sound is improved, and the connection hole 371 has a communication effect, so that the sound expansion hole 361 is communicated with the external environment; the PCB 370 is provided with two connecting columns 372, the two connecting columns 372 are respectively penetrated through the two positioning holes 420, and the positioning holes 420 have positioning and fixing functions, so that the connecting columns are more accurately and firmly installed; the connecting column 372 is electrically connected through a lead, and the connecting column 372 is used for connecting the anode and the cathode of a power supply, so that the microphone can normally work.

In one embodiment, a fixing ring is arranged on the microphone shell, the fixing ring has a circular ring-shaped structure, the first sound mixing paper is embedded in the fixing ring, and the fixing ring has the function of fixing the first sound mixing paper, so that the first sound mixing paper is prevented from being deviated and the directivity of the microphone is prevented from being influenced; for another example, the fixing ring is provided with a fixing port, the fixing port can facilitate the replacement of the first tuning paper by a manufacturer, the first tuning paper can be torn more easily and is convenient to replace, and the production efficiency of the microphone is improved; for another example, the microphone shell is sleeved with two rubber anti-slip strips, the rubber anti-slip strips are of a round strip-shaped structure, and have an anti-slip effect, when the microphone is mounted on a product, the microphone is not prone to slipping in the use process of the product, noise is prevented from being generated by the microphone, and stability of the microphone is improved; for another example, the inner ring of the voice expansion coil is provided with a chamfered corner part, and the chamfered corner part can enable sound to be easier to expand and enable the sound to be louder; if, sound inlet and sound outlet are set up to the public address circle, sound inlet set up in the public address circle is close to one of dust screen is served, sound outlet set up in the voice coil loudspeaker voice coil is kept away from one of dust screen is served, sound outlet is greater than sound inlet, set up like this and can let when the sound of external environment gets into the miaow head inside, sound enlarges gradually, makes sound become louder more, has improved the sensitivity that the miaow head picked up sound, like this, is favorable to overall structure's stability.

In one embodiment, the sound amplifying hole is respectively provided with an inner opening and an outer opening, the inner opening faces one side of the gold-plated vibrating diaphragm, the outer opening faces one side of the PCB, and the inner opening is larger than the outer opening, so that when sound of an external environment enters the microphone, the sound is gradually expanded, the sound becomes louder, and the sensitivity of the microphone for picking up the sound is improved; for another example, the fixed pressing plate is provided with a positioning mounting groove which is communicated with the pressing plate sound pickup hole, the second tuning paper is embedded into the positioning mounting groove, and the positioning mounting groove has the function of fixing the second tuning paper, so that the second tuning paper is firmer and is not easy to fall off, and the stability of the microphone is improved; the fixed pressing plate is provided with a positioning groove, the positioning groove can facilitate the replacement of the second tuning paper by a manufacturer, the second tuning paper is easier to tear and convenient to replace, and the production efficiency of the microphone is improved; if the plastic ring has the circular ring-shaped structure, the inner side wall of the plastic ring is coated with the non-adhesive glue, so that the microphone inner element can be protected more firmly, the microphone inner element is prevented from shaking, the tone quality of the microphone is influenced, the stability of the microphone is improved, and the stability of the whole structure is facilitated.

The bidirectional directional adjustment microphone 10 is provided with the first tone tuning paper 100, the microphone shell 200, the microphone main body 300, the fixed pressing plate 400 and the second tone tuning paper 500, wherein the first tone tuning paper 100 is arranged on the microphone shell 200, and has the effect of adjusting the microphone directivity, and the time of sound reaching a microphone hole is prolonged by changing the number of layers of the tone tuning paper, so that the effect of adjusting the microphone directivity is achieved; the voice amplification coil 330 has the function of amplifying sound, so that smaller sound can be amplified, when the sound contacts the gold-plated vibrating diaphragm 350, the gold-plated vibrating diaphragm 350 can vibrate more easily, the sound picked up by the microphone is more sensitive, and the sound quality of the microphone is improved; the utility model discloses it is more convenient to have the equipment, and stability is relatively good, is difficult to take place to rock, and the directive property that can two-way regulation miaow head and the sensitivity of picking up sound are relatively good.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments are only intended to illustrate some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (9)

1. The utility model provides a two-way regulation directive property miaow head which characterized in that includes: the microphone comprises a first tone tuning paper, a microphone shell, a microphone main body, a fixed pressing plate and a second tone tuning paper, wherein the microphone shell is arranged on the fixed pressing plate, the microphone main body is accommodated in the microphone shell and the fixed pressing plate, the first tone tuning paper is arranged on the microphone shell, and the second tone tuning paper is arranged on the fixed pressing plate;

the microphone comprises a microphone shell, a first tone tuning paper, a second tone tuning paper, a fixed pressing plate and a pressing plate, wherein one end of the microphone shell is provided with a plurality of microphone picking holes, the first tone tuning paper is used for covering the plurality of microphone picking holes, the other end of the microphone shell is provided with an installation opening, the fixed pressing plate is used for covering the installation opening, the fixed pressing plate is provided with a pressing plate picking hole, the second tone tuning paper is used for covering the pressing plate picking hole, and the fixed pressing plate is provided with two positioning holes;

the microphone main body comprises a dustproof net, a plastic ring, a voice coil expander, a fixed gasket, a gold-plated vibrating diaphragm, a polar plate and a PCB (printed Circuit Board), the dustproof net is arranged on the inner side wall of the microphone shell and is used for covering the microphone sound pickup hole, the plastic ring is arranged in the microphone shell, the outer side wall of the plastic ring is attached to the inner side wall of the microphone shell, the plastic ring is attached to one side surface of the dustproof net far away from the microphone sound pickup hole, the voice coil expander, the fixed gasket, the vibrating diaphragm gold-plated, the polar plate and the PCB are sequentially overlapped upwards in the plastic ring, the plastic ring is respectively connected with the voice coil expander, the fixed gasket, the gold-plated vibrating diaphragm, the polar plate and the PCB, the voice coil expander is arranged on the polar plate, and a connecting hole, the sound expansion hole, the connecting hole and the pressing plate sound picking hole are communicated with each other, two connecting columns are arranged on the PCB, the two connecting columns penetrate through the two positioning holes respectively, and the connecting columns are electrically connected through a conducting wire.

2. The directional microphone according to claim 1, wherein a fixing ring is provided on the microphone housing, the fixing ring has a ring structure, and the first tuning paper is embedded in the fixing ring.

3. The directional microphone as claimed in claim 2, wherein the fixing ring has a fixing opening.

4. The microphone according to claim 1, wherein two rubber anti-slip strips are sleeved on the microphone housing, and each rubber anti-slip strip has a round strip-shaped structure.

5. A bi-directional adjustable directional microphone according to claim 1, wherein the inner ring of the voice coil expander is provided with a chamfered corner.

6. The microphone according to claim 5, wherein the speaker coil is provided with a sound inlet and a sound outlet, the sound inlet is disposed at an end of the speaker coil close to the dust screen, the sound outlet is disposed at an end of the speaker coil away from the dust screen, and the sound outlet is larger than the sound inlet.

7. The microphone as claimed in claim 1, wherein the sound-diffusing holes are respectively provided with an inner opening and an outer opening, the inner opening faces one side of the gold-plated diaphragm, the outer opening faces one side of the PCB, and the inner opening is larger than the outer opening.

8. The directional microphone according to claim 1, wherein the fixed platen has a positioning groove formed thereon, the positioning groove communicating with the pickup hole of the platen, the second tuning paper being inserted into the positioning groove, and the fixed platen having a positioning groove formed thereon.

9. The bi-directional adjustable directional microphone as claimed in claim 1, wherein the plastic ring has a circular ring structure, and the inner sidewall of the plastic ring is coated with a non-adhesive.

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