Anti-howling microphone

Abstract

The utility model relates to the technical field of telecommunication, and particularly discloses an anti-howling microphone, which comprises a capacitance microphone core, a sound pickup hole is arranged on the top surface of the capacitance microphone core, and an air hole is arranged on the bottom surface of the capacitance microphone core; the microphone core bracket comprises a microphone core fixing part used for installing the capacitance microphone core and a sound wave diffusion part located under the capacitance microphone core; wherein the sound wave diffusion part is of a conical structure which is gradually narrowed towards the capacitance microphone core. The anti-howling microphone provided by the utility model can effectively solve the problem that howling is easily caused when a capacitive microphone core is used for pickup.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric communication technology especially relates to a kind of anti howling microphones. BACKGROUND

[0002] Capacitor microphone core is the core component of condenser microphone (also known as capacitor microphone or condenser microphone), its working principle is to use sound wave vibration to affect the diaphragm on microphone core, thereby changing the capacitance of capacitor, and then converting sound wave into electrical signal.

[0003] The top surface of capacitor microphone core is provided with a sound collecting hole for collecting sound, and the sound enters the inside of capacitor microphone core through the sound collecting hole, so that the diaphragm vibrates up and down. In order to reduce the obstruction to the vibration of diaphragm, the bottom surface of capacitor microphone core is usually provided with a ventilation hole.

[0004] The vibration of diaphragm will cause air vibration, and the vibrating air will be transmitted downward through the ventilation hole. Since the space in the microphone is narrow, the vibrating air will eventually be transmitted back into the capacitor microphone through the sound collecting hole, which will interfere with the sound collection of capacitor microphone, and finally cause howling.

[0005] Therefore, it is necessary to improve the existing microphone to solve the problem that howling is easily caused when using capacitor microphone for sound collection.

[0006] The above information disclosed in the background section is only included to enhance the understanding of the background of the present disclosure, and therefore can include information that does not form prior art known to those of ordinary skill in the art at the present time. UTILITY MODEL CONTENT

[0007] One object of the utility model is to provide an anti-howling microphone, which can effectively solve the problem that howling is easily caused when using capacitor microphone for sound collection.

[0008] To achieve the above purpose, the utility model provides an anti-howling microphone, which comprises:

[0009] A capacitor microphone core, the top surface of the capacitor microphone core is provided with a sound collecting hole, and the bottom surface is provided with a ventilation hole;

[0010] A microphone core support, the microphone core support comprises a microphone core fixing part for mounting the capacitor microphone core, and a sound wave diffusion part located directly below the capacitor microphone core; wherein the sound wave diffusion part is in the form of a conical structure gradually narrowing towards the capacitor microphone core.

[0011] Optionally, the microphone core fixing part and the sound wave diffusion part are connected by a plurality of flexible connecting parts.

[0012] Optionally, it further comprises:

[0013] A handheld shell, the inside of the handheld shell is provided with a containing cavity with an opening facing upward.

[0014] a sealing cover, which is installed on the top of the handheld shell and covers the opening of the accommodating cavity;

[0015] a mainboard, which is located in the accommodating cavity;

[0016] a lithium battery, which is located in the accommodating cavity and electrically connected with the mainboard.

[0017] Optionally, the sealing cover is provided with an upwardly protruding stand,

[0018] the microphone holder is provided with a fixing sleeve in plug connection with the stand.

[0019] Optionally, the condenser microphone and the mainboard are electrically connected through a wire.

[0020] Optionally, the sound wave diffusion part is provided with a first wire passing hole for the wire to pass through.

[0021] Optionally, the first wire passing hole is located at the pointed top position of the sound wave diffusion part.

[0022] Optionally, the sealing cover is provided with a second wire passing hole for the wire to pass through.

[0023] Optionally, the second wire passing hole is provided with a filler for filling the second wire passing hole.

[0024] The bottom of the handheld shell is provided with a loudspeaker.

[0025] Optionally, the filler is EVA

[0026] The utility model discloses a beneficial effect lies in: provide a kind of anti howling microphone, increase a conical structure's sound wave diffusion part below condenser microphone:

[0027] First, sound wave diffusion part is conical structure, this structure helps to guide sound wave downward and away from pickup hole, and then effectively disperses the sound wave from the air hole of condenser microphone bottom surface, reduces the back and forth reflection of sound wave in the space inside microphone, thereby reducing the possibility of sound wave directly bouncing back to pickup hole.This diffusion reduces the opportunity of forming positive feedback cycle (positive feedback is the main reason for howling) of sound wave inside microphone.

[0028] Second, the fixing part of microphone holder can ensure the stable installation of condenser microphone, reduce the displacement due to vibration, which also helps to improve the stability of pickup, further reduce the howling problem caused by mechanical vibration.

[0029] Therefore, the anti howling microphone provided by the utility model can effectively solve the problem of howling caused by using condenser microphone for pickup. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic cross-sectional view of an anti-howling microphone provided in an embodiment;

[0032] Figure 2 This is a schematic structural diagram of the microphone core bracket provided in the embodiment.

[0033] In the picture:

[0034] 1. Handheld housing; 101. Accommodating cavity;

[0035] 2. Sealing cover; 201. Vertical pole; 202. Second wire hole;

[0036] 3. Motherboard;

[0037] 4. Lithium battery;

[0038] 5. Capacitive microphone core;

[0039] 6. Microphone core bracket; 601. Microphone core fixing part; 602. Sound wave diffusion part; 6021. First wire hole; 603. Fixing sleeve; 604. Flexible connection part;

[0040] 7. Filling;

[0041] 8. Speaker. DETAILED DESCRIPTION

[0042] References to "embodiments" in this utility model mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or relevance to other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the various embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0043] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0044] In the description of the utility model, the phrase "and / or" is a description for describing the logical relationship between objects, which means that there can be three relationships, for example, A and / or B, which means that there are A, B, and A and B at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a "or" logical relationship.

[0045] In the utility model, phrases such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary or order relationship between the entities or operations.

[0046] Without more restrictions, in the utility model, "including", "containing", "having" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent in such process, method or product.

[0047] As the same understanding as in the "Guidelines for Examination", in the utility model, "greater than", "less than", "exceeding" and other expressions are understood as not including the number; "above", "below", "within" and other expressions are understood as including the number. In addition, in the description of the embodiments of the utility model, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0048] In the description of the embodiments of the utility model, the spatial-related expressions used, such as "center", "vertical", "horizontal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The indicated orientation or position relationship is based on the orientation or position relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of the utility model or for the reader to understand, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, therefore it cannot be understood as a limitation on the embodiments of the utility model.

[0049] Unless otherwise clearly indicated or implied to the contrary, the terms "mounting", "connected", "connection", "fixed", "setting", and the like used in the description of the embodiments of the present application are to be construed in a broad sense. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be internal communication of two elements, or interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] Referring to Figure 1 The utility model provides a kind of anti howling microphone, including handheld shell 1, sealing cover 2, mainboard 3, lithium battery 4, condenser microphone core 5, microphone core support 6.

[0051] The inside of the handheld shell 1 is provided with a containing cavity 101 with an opening upward;The sealing cover 2 is installed on the top of the handheld shell 1, and covers the opening of the containing cavity 101;The mainboard 3 is located in the containing cavity 101;The lithium battery 4 is located in the containing cavity 101 and is electrically connected with the mainboard 3.

[0052] The structural design of handheld shell 1, sealing cover 2, mainboard 3 and lithium battery 4 provides a complete packaging scheme for the microphone, which is not only convenient to carry and use, but also protects the internal elements from the external environment, enhances the durability and reliability of the microphone

[0053] The sealing cover 2 is provided with an upward protruding stand 201, and the microphone core support 6 is provided with a fixing sleeve 603 in plug connection with the stand 201. The fixing sleeve 603 is sleeved on the top of the stand 201, and the positioning between the microphone core support 6 and the sealing cover 2 is completed. The plug connection design of the stand 201 and the fixing sleeve 603 facilitates the installation and disassembly of the microphone core support 6, and simplifies the assembly and maintenance process of the microphone.

[0054] Referring to Figure 2 In the embodiment, the top surface of the condenser microphone core 5 is provided with a sound pickup hole, and the bottom surface is provided with a ventilation hole;The microphone core support 6 includes a microphone core fixing part 601 for mounting the condenser microphone core 5, and a sound wave diffusion part 602 located directly below the condenser microphone core 5;Wherein, the sound wave diffusion part 602 is in the form of a conical structure gradually narrowing towards the condenser microphone core 5.

[0055] The anti howling microphone provided in the embodiment increases a sound wave diffusion part 602 in the form of a conical structure below the condenser microphone core 5:

[0056] Firstly, the sound wave diffusion part 602 is in a conical structure, which helps to guide the sound waves downward and away from the pickup hole, and effectively disperses the sound waves from the air hole at the bottom of the condenser microphone 5, reduces the reflection of the sound waves in the space inside the microphone, and reduces the possibility of the sound waves bouncing back to the pickup hole. The diffusion effect reduces the opportunity of the sound waves forming a positive feedback loop inside the microphone (positive feedback is the main cause of howling);

[0057] Secondly, the fixed part of the microphone support 6 can ensure the stable installation of the condenser microphone 5, reduce the displacement caused by vibration, and also help to improve the stability of the pickup, and further reduce the howling problem caused by mechanical vibration.

[0058] Therefore, the anti-howling microphone can effectively solve the problem of howling caused by the condenser microphone 5 during pickup.

[0059] Optionally, the microphone fixing part 601 and the sound wave diffusion part 602 are connected by a plurality of flexible connecting parts 604. The condenser microphone 5 will vibrate when working, the flexible connecting part 604 is not strong in rigidity and is easy to deform, thereby buffering the vibration generated by the condenser microphone 5, reducing the mechanical noise caused by vibration, and improving the overall performance and recording quality of the microphone.

[0060] In this embodiment, the condenser microphone 5 and the main board 3 are electrically connected by wires. Correspondingly, the sound wave diffusion part 602 is provided with a first wire passing hole 6021 for the wires to pass through, and the sealing cover 2 is provided with a second wire passing hole 202 for the wires to pass through.

[0061] Optionally, the first wire passing hole 6021 is located at the tip position of the sound wave diffusion part 602. The first wire passing hole 6021 is arranged at the tip position of the sound wave diffusion part 602, which minimizes the influence on the sound wave diffusion effect, and avoids the interference of the wires with the propagation path of the sound waves.

[0062] In this embodiment, the bottom of the handheld shell 1 is provided with a loudspeaker 8 electrically connected to the main board 3 (at this time, the microphone can be used as a K song treasure), and the second wire passing hole 202 is provided with a filler 7 for filling the second wire passing hole 202. The filler 7 fills the second wire passing hole 202, enhances the sealing effect, effectively isolates the air propagation between the loudspeaker 8 and the condenser microphone 5, so as to prevent the sound emitted by the loudspeaker 8 from interfering with the condenser microphone 5, and finally causing howling.

[0063] Optionally, EVA can be used as the filler 7, which has the advantages of light weight, softness and good sound insulation performance, further improving the sound insulation, shock absorption and sealing effect of the microphone, and optimizing the use experience.

[0064] Optionally, the microphone core support 6 is a silica gel piece. The silica gel material has good shock absorption performance, which can effectively reduce the damage to the internal elements of the microphone caused by collision or vibration. At the same time, the silica gel conical structure can also play a certain protective role for the microphone, avoiding direct impact and wear.

[0065] In summary, the anti-howling microphone provided by the embodiment has the following beneficial effects:

[0066] ①Through the conical sound wave diffusion part 602, the positive feedback opportunity of the internal sound wave of the microphone is effectively reduced, the howling phenomenon is reduced, and the clarity and stability of the sound are improved;

[0067] ②The design of the fixed part and the flexible connecting part 604 of the microphone core support 6 ensures the stability of the condenser microphone core 5 and reduces the noise caused by vibration, and improves the recording quality of the microphone;

[0068] ③The plug-in connection design of the vertical rod 201 and the fixed sleeve 603 facilitates the installation and maintenance of the microphone core support 6 and simplifies the assembly process;

[0069] ④The setting of the first wire hole 6021 not only ensures the safe passage of the wire, but also minimizes the influence on the sound wave diffusion effect;

[0070] ⑤The filler 7 of the second wire hole 202, especially the use of EVA material, enhances the sealing effect, effectively isolates the sound interference between the loudspeaker 8 and the condenser microphone core 5, prevents the generation of howling, and improves the sound insulation and shock absorption performance of the microphone.

[0071] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, the patent protection scope of the present application should not be limited. Any equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content described in the specification and drawings, directly or indirectly, and the technical solutions of the above embodiments applied to other related technical fields, etc. are all included in the patent protection scope of the present application.

Claims

1. An anti-howling microphone, characterized in that: include: A condenser microphone core (5), wherein the top surface of the condenser microphone core (5) is provided with a sound pickup hole, and the bottom surface is provided with an air vent; A microphone core bracket (6), the microphone core bracket (6) comprising a microphone core fixing portion (601) for mounting the capacitor microphone core (5), and a sound wave diffusion portion (602) located directly below the capacitor microphone core (5); wherein the sound wave diffusion portion (602) is a conical structure that gradually narrows toward the capacitor microphone core (5).

2. The anti-howling microphone according to claim 1, characterized in that: The microphone core fixing portion (601) and the sound wave diffusion portion (602) are connected via a plurality of flexible connection portions (604).

3. The anti-howling microphone according to claim 1, characterized in that: Also includes: A handheld housing (1), wherein the interior of the handheld housing (1) is provided with an accommodating cavity (101) with an upward opening; A sealing cover (2), the sealing cover (2) being mounted on the top of the handheld housing (1) and sealing the opening of the accommodating cavity (101); A main board (3), the main board (3) being located in the accommodating cavity (101); A lithium battery (4), the lithium battery (4) is located in the accommodating cavity (101) and is electrically connected to the mainboard (3).

4. The anti-howling microphone according to claim 3, characterized in that: The sealing cover (2) is provided with a vertical rod (201) protruding upward. The microphone core bracket (6) is provided with a fixing sleeve (603) that is pluggably connected to the vertical pole (201).

5. The anti-howling microphone according to claim 3, characterized in that: The capacitor microphone core (5) and the mainboard (3) are electrically connected via a wire.

6. The anti-howling microphone according to claim 5, characterized in that: The sound wave diffusion portion (602) is provided with a first wire hole (6021) for the wire to pass through.

7. The anti-howling microphone according to claim 6, characterized in that: The first wire hole (6021) is located at the top of the sound wave diffusion portion (602).

8. The anti-howling microphone according to claim 5, characterized in that: The sealing cover (2) is provided with a second wire hole (202) for the wire to pass through.

9. The anti-howling microphone according to claim 8, characterized in that: A filler (7) for filling the second wire passing hole (202) is provided in the second wire passing hole (202); A speaker (8) is provided at the bottom of the handheld housing (1).

10. The anti-howling microphone according to claim 9, characterized in that: The filler (7) is EVA.

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