CN219678644U - Unidirectional microphone straw structure capable of reducing wind noise - Google Patents
Unidirectional microphone straw structure capable of reducing wind noise Download PDFInfo
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- CN219678644U CN219678644U CN202320626651.6U CN202320626651U CN219678644U CN 219678644 U CN219678644 U CN 219678644U CN 202320626651 U CN202320626651 U CN 202320626651U CN 219678644 U CN219678644 U CN 219678644U
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- 239000010902 straw Substances 0.000 title claims abstract description 25
- 241000209140 Triticum Species 0.000 claims abstract description 15
- 235000021307 Triticum Nutrition 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 230000007423 decrease Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a unidirectional microphone wheat straw structure capable of reducing wind noise, the wheat straw is provided with a pickup head shell, the pickup head shell is internally provided with a unidirectional microphone, a pickup cavity and a pickup channel, the unidirectional microphone is arranged on one side of the pickup cavity in a fitting way, the pickup cavity is adjacent to the pickup channel, two ends of the pickup channel are respectively provided with a first sound inlet on the outer side of the pickup head shell, one side of the pickup channel, which is close to the pickup head shell, is provided with an arc-shaped wall surface which is bent towards the pickup cavity and can enable fluid to generate a coanda effect, the side wall of the pickup cavity is provided with a second sound inlet communicated with the middle part of the pickup channel, and the second sound inlet is arranged opposite to the arc-shaped wall surface. By adopting the utility model, wind noise can be effectively reduced, and pickup quality under the condition of wind can be improved.
Description
Technical Field
The utility model belongs to the technical field of microphones, and particularly relates to a unidirectional microphone straw structure capable of reducing wind noise.
Background
The conversation earphone with the wheat straw often places a unidirectional microphone at the top end of the wheat straw to pick up the voice of a caller, and simultaneously applies the directivity characteristic of the microphone to shield the noise of the surrounding environment. The unidirectional microphone is provided with a front pick-up hole and a rear pick-up hole, so that the wheat straw is also provided with a front sound inlet and a rear sound inlet. Current straw designs typically employ a sound inlet 100-pickup cavity 200-single directional microphone 300 design, as shown in fig. 1. However, the main disadvantage of this solution is that the pick-up wind noise is large and in windy conditions the pick-up quality is affected. This is because the unidirectional microphone produces directivity by the pressure difference of the sound inlet hole, and is thus sensitive to wind noise, and wind noise is difficult to reduce. As with the straw design shown in fig. 1, the wind flow may directly impinge into the pickup hole, causing a large wind noise. Therefore, how to reduce wind noise of the unidirectional microphone boom has been a major and difficult problem for unidirectional microphone boom designs.
Disclosure of Invention
The utility model aims to provide a unidirectional microphone straw structure which can reduce wind noise and improve pickup quality under the condition of wind.
In order to solve the technical problems, the first technical scheme adopted by the utility model is as follows:
can reduce unidirectional microphone wheat straw structure of wind noise, the wheat straw is equipped with the pickup casing, be equipped with unidirectional microphone, pickup chamber and pickup passageway in the pickup casing, unidirectional microphone laminating sets up one side in pickup chamber, the pickup chamber with the pickup passageway is adjacent, the both ends of pickup passageway are in respectively the outside of pickup casing is formed with first inlet, the pickup passageway is close to one side of pickup casing is equipped with to the curved arc wall that enables fluid and take place coanda effect in pickup chamber, be equipped with on the lateral wall of pickup chamber with the second inlet of the middle part intercommunication of pickup passageway, the second inlet with the arc wall is relative setting.
As a preferred embodiment of the utility model, the curved wall surface satisfies h/r <0.5, where h is the equivalent width of the air flow through the sound pickup channel and r is the radius of curvature of the curved wall surface.
As a preferable mode of the utility model, a wall surface of the pick-up channel on a side far away from the arc-shaped wall surface is a plane.
As a preferable mode of the utility model, the width of the sound pickup passage gradually decreases from the first sound inlet to the middle thereof.
In order to solve the technical problems, a second technical scheme adopted by the utility model is as follows:
the utility model provides a can reduce unidirectional microphone wheat straw structure of wind noise, the wheat straw is equipped with pickup casing, be equipped with unidirectional microphone, preceding pickup chamber, preceding pickup passageway, back pickup chamber and back pickup passageway in the pickup casing, preceding pickup chamber with back pickup chamber is by unidirectional microphone separates the cavity of pickup casing forms;
the front pickup cavity is adjacent to the front pickup channel, two ends of the front pickup channel are respectively provided with a first forward sound inlet at the front side of the outer part of the pickup head shell, one side of the front pickup channel, which is close to the pickup head shell, is provided with a front arc-shaped wall surface which is bent towards the front pickup cavity and can enable fluid to generate a coanda effect, the side wall of the front pickup cavity is provided with a second forward sound inlet communicated with the middle part of the front pickup channel, and the second forward sound inlet and the front arc-shaped wall surface are oppositely arranged;
the utility model discloses a pick-up head, including the pick-up head casing, the pick-up head casing is equipped with the pick-up head casing, the pick-up head is equipped with the pick-up chamber with the pick-up passageway is adjacent after the pick-up is equipped with the pick-up passageway, the both ends of pick-up passageway are in respectively the outside rear side of pick-up head casing is formed with first back sound inlet, the pick-up passageway is close to one side of pick-up head casing is equipped with to the curved back arc wall that just enables fluid to take place the coanda effect after the pick-up chamber, be equipped with on the lateral wall of back pick-up chamber with the second back sound inlet of the middle part intercommunication of back pick-up passageway, the second back sound inlet with back arc wall is relative setting.
As a preferable scheme of the utility model, the front arc-shaped wall surface meets h/r <0.5, wherein h is the equivalent width of air flow passing through the front pickup channel, and r is the curvature radius of the front arc-shaped wall surface.
As a preferable scheme of the utility model, the rear arc-shaped wall surface meets h/r <0.5, wherein h is the equivalent width of the airflow passing through the rear pickup channel, and r is the curvature radius of the rear arc-shaped wall surface.
As a preferable mode of the utility model, a wall surface of the front sound pickup passage on a side away from the front arc-shaped wall surface is a plane.
As a preferable mode of the utility model, a wall surface of the rear sound pickup passage on a side away from the rear arc-shaped wall surface is a plane.
As a preferable mode of the present utility model, the width of the front sound pickup passage or the width of the rear sound pickup passage gradually decreases from the first forward sound inlet or the first rear sound inlet toward the center thereof.
Compared with the prior art, the unidirectional microphone straw structure capable of reducing wind noise has the beneficial effects that:
according to the utility model, the pick-up cavity and the pick-up channel which are mutually communicated are arranged on one side or two sides of the unidirectional microphone, the pick-up channel is designed into a channel with a certain curvature according to the Kanga effect fluid mechanics, the two ends of the pick-up channel are respectively provided with the first sound inlet, when wind enters the pick-up channel from the first sound inlet at one end, the wind flows out from the other end along the arc wall surface of the channel, and after entering the pick-up channel through the two first sound inlets (without front-back sequence), sound waves enter the pick-up cavity through the second sound inlet in the middle part of the pick-up channel in a radiation sound wave mode, and are picked up by the unidirectional microphone at the pick-up cavity, so that the physical wind noise reduction is realized, the wind noise influence in the conversation process is effectively reduced, and the conversation quality under the wind condition is improved; simultaneously, because the second sound inlet sets up in the one side of keeping away from the arc wall, so can greatly reduce the condition that wind got into the pickup chamber from the second sound inlet, further reduce wind noise, the result of use is better.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a prior art unidirectional microphone boom structure;
fig. 2 is an assembly diagram of a microphone boom structure capable of reducing wind noise;
FIG. 3 is a cross-sectional view of a single directional microphone boom structure for reducing wind noise in accordance with the present utility model;
fig. 4 is an assembly diagram of a front-rear dual pickup cavity structure of a single directional microphone straw structure capable of reducing wind noise according to the present utility model;
fig. 5 is a cross-sectional view of the present utility model, illustrating a front-rear dual pickup cavity structure, showing the front pickup cavity and the front pickup channel;
fig. 6 is a cross-sectional view of the present utility model, illustrating a rear sound pickup cavity and a rear sound pickup channel, with a front-rear dual sound pickup cavity structure as an example;
fig. 7 is a diagram showing noise reduction effect of the microphone boom structure of the unidirectional microphone capable of reducing wind noise according to the preferred embodiment of the present utility model.
The marks in the figure:
a sound pickup head housing 1; a unidirectional microphone 2; a sound pick-up chamber 3; a front sound pickup chamber 3a; a rear sound pickup chamber 3b; a sound pickup passage 4; a front sound pickup passage 4a; a rear sound pickup passage 4b; a first sound inlet 5; a first forward sound port 5a; an arc-shaped wall surface 6; a front arc wall 6a; a rear arc wall 6b; a second sound inlet 7; a second forward sound port 7a; a second rear sound inlet 7b.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 7, a description will now be given of a microphone boom structure capable of reducing wind noise.
As shown in fig. 2 and 3, in the structure of the unidirectional microphone wheat straw capable of reducing wind noise according to the preferred embodiment of the present utility model, the wheat straw is provided with a pickup housing 1, the pickup housing 1 is internally provided with a unidirectional microphone 2, a pickup cavity 3 and a pickup channel 4, the unidirectional microphone 2 is attached to one side of the pickup cavity 3, the pickup cavity 3 is adjacent to the pickup channel 4, two ends of the pickup channel 4 are respectively formed with a first sound inlet 5 at the outer side of the pickup housing 1, one side of the pickup channel 4 close to the pickup housing 1 is provided with an arc-shaped wall 6 which is bent towards the pickup cavity 3 and enables fluid to generate a coanda effect, the width of the pickup channel 4 gradually decreases from the first sound inlet 5 to the middle thereof, the side wall of the pickup cavity 3 is provided with a second sound inlet 7 communicated with the middle of the pickup channel 4, and the second sound inlet 7 is opposite to the arc-shaped wall 6. Wherein the arc-shaped wall surface 6 satisfies h/r <0.5, wherein h is the equivalent width of the air flow passing through the pickup channel 4, and r is the curvature radius of the arc-shaped wall surface 6.
In an alternative embodiment, as shown in fig. 4 to 6, taking the front-rear dual pickup cavity 3 structure as an example, the single directional microphone 2 straw structure specifically includes: the pick-up head shell 1 is internally provided with a unidirectional microphone 2, a front pick-up cavity 3a, a front pick-up channel 4a, a rear pick-up cavity 3b and a rear pick-up channel 4b, wherein the front pick-up cavity 3a and the rear pick-up cavity 3b are formed by separating a cavity of the pick-up head shell 1 by the unidirectional microphone 2; the front sound pickup cavity 3a is adjacent to the front sound pickup channel 4a, a first forward sound inlet 5a is formed at two ends of the front sound pickup channel 4a at the front side of the exterior of the sound pickup head housing 1, a front arc-shaped wall surface 6a which is bent towards the front sound pickup cavity 3a and can generate a coanda effect on fluid is arranged at one side of the front sound pickup channel 4a, the width of the front sound pickup channel 4a gradually decreases from the first forward sound inlet 5a to the middle part of the front sound pickup channel 4a, a second forward sound inlet 7a communicated with the middle part of the front sound pickup channel 4a is arranged on the side wall of the front sound pickup cavity 3a, and the second forward sound inlet 7a is arranged opposite to the front arc-shaped wall surface 6a; the rear pickup cavity 3b is adjacent to the rear pickup channel 4b, a first rear sound inlet 5b is formed at two ends of the rear pickup channel 4b at the rear side of the exterior of the pickup head housing 1, a rear arc-shaped wall surface 6b which is bent towards the rear pickup cavity 3b and enables fluid to generate a coanda effect is arranged at one side of the rear pickup channel 4b, the width of the rear pickup channel 4b gradually decreases from the first rear sound inlet 5b to the middle of the rear pickup cavity, a second rear sound inlet 7b communicated with the middle of the rear pickup channel 4b is arranged on the side wall of the rear pickup cavity 3b, and the second rear sound inlet 7b is arranged opposite to the rear arc-shaped wall surface 6 b. Wherein the front arc-shaped wall surface 6a satisfies h/r <0.5, wherein h is the equivalent width of the airflow passing through the front pickup channel 4a, and r is the curvature radius of the front arc-shaped wall surface 6a; the rear arc-shaped wall surface 6b satisfies h/r <0.5, wherein h is the equivalent width of the airflow passing through the rear pickup passage 4b, and r is the radius of curvature of the rear arc-shaped wall surface 6 b.
Illustratively, the wall surface of the front sound pickup passage 4a on the side away from the front arc-shaped wall surface 6a may be a flat surface, or may have other shapes.
Illustratively, the wall surface of the rear sound pickup passage 4b on the side away from the rear arc-shaped wall surface 6b may be a flat surface or may have other shapes.
In summary, according to the unidirectional microphone 2 straw structure capable of reducing wind noise provided by the embodiment of the utility model, by arranging the pickup cavity 3 and the pickup channel 4 which are mutually communicated on one side or two sides of the unidirectional microphone 2, the pickup channel 4 is designed into a channel with a certain curvature according to the coanda effect fluid mechanics, two ends of the pickup channel 4 are respectively provided with the first sound inlet 5, when wind enters the pickup channel 4 from one end of the first sound inlet 5, the wind flows out from the other end along the arc-shaped wall 6 of the channel, and after entering the pickup channel 4 through the two first sound inlets 5 (no front-back sequence), sound waves enter the pickup cavity 3 through the second sound inlet 7 in the middle part of the pickup channel 4 in a radiation sound wave mode, and are picked up by the unidirectional microphone 2 in the pickup cavity 3, so that the wind noise reduction is realized, the wind noise influence in the conversation process is effectively reduced, and the conversation quality under the condition of wind is improved. Meanwhile, the second sound inlet 7 is arranged on one side far away from the arc-shaped wall surface 6, so that the condition that wind enters the pickup cavity 3 from the second sound inlet 7 can be greatly reduced, the wind noise is further reduced, and the using effect is better. As shown in FIG. 7, wind noise test is carried out at a wind speed of 3m/s, and by adopting the scheme design of the utility model, compared with the prior art, the maximum reduction amplitude of wind noise in a frequency band below 500Hz can reach 8dB; the maximum reduction amplitude of wind noise in the frequency range of 1.5 KHz-4 KHz can reach 5dB.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. The utility model provides a can reduce unidirectional microphone wheat straw structure of wind noise, the wheat straw is equipped with pickup head casing, its characterized in that, be equipped with unidirectional microphone, pickup cavity and pickup passageway in the pickup head casing, unidirectional microphone laminating sets up one side in pickup cavity, the pickup cavity with the pickup passageway is adjacent, the both ends of pickup passageway are in respectively the outside of pickup head casing is formed with first inlet, the pickup passageway is close to one side of pickup head casing is equipped with to the curved arc wall that enables fluid and take place the coanda effect in pickup cavity, be equipped with on the lateral wall in pickup cavity with the second inlet of the middle part intercommunication in pickup passageway, the second inlet with the arc wall is relative the setting.
2. The microphone boom structure of claim 1, wherein the arcuate wall satisfies h/r <0.5, where h is the equivalent width of the airflow through the pickup channel and r is the radius of curvature of the arcuate wall.
3. The microphone boom structure of claim 1, wherein the pick-up channel is planar on a side of the curved wall.
4. The microphone boom structure of claim 1, wherein the pickup channel has a width that gradually decreases from the first sound inlet toward a center thereof.
5. The utility model provides a can reduce unidirectional microphone wheat straw structure of wind noise, the wheat straw is equipped with pickup head casing, its characterized in that, be equipped with unidirectional microphone, preceding pickup cavity, preceding pickup passageway, back pickup cavity and back pickup passageway in the pickup head casing, preceding pickup cavity with back pickup cavity is by unidirectional microphone separates the cavity of pickup head casing;
the front pickup cavity is adjacent to the front pickup channel, two ends of the front pickup channel are respectively provided with a first forward sound inlet at the front side of the outer part of the pickup head shell, one side of the front pickup channel, which is close to the pickup head shell, is provided with a front arc-shaped wall surface which is bent towards the front pickup cavity and can enable fluid to generate a coanda effect, the side wall of the front pickup cavity is provided with a second forward sound inlet communicated with the middle part of the front pickup channel, and the second forward sound inlet and the front arc-shaped wall surface are oppositely arranged;
the utility model discloses a pick-up head, including the pick-up head casing, the pick-up head casing is equipped with the pick-up head casing, the pick-up head is equipped with the pick-up chamber with the pick-up passageway is adjacent after the pick-up is equipped with the pick-up passageway, the both ends of pick-up passageway are in respectively the outside rear side of pick-up head casing is formed with first back sound inlet, the pick-up passageway is close to one side of pick-up head casing is equipped with to the curved back arc wall that just enables fluid to take place the coanda effect after the pick-up chamber, be equipped with on the lateral wall of back pick-up chamber with the second back sound inlet of the middle part intercommunication of back pick-up passageway, the second back sound inlet with back arc wall is relative setting.
6. The microphone boom structure of claim 5, wherein the front arcuate wall satisfies h/r <0.5, where h is the equivalent width of the airflow through the front pickup channel and r is the radius of curvature of the front arcuate wall.
7. The microphone boom structure of claim 5, wherein the rear arcuate wall satisfies h/r <0.5, where h is the equivalent width of the airflow through the rear pickup channel and r is the radius of curvature of the rear arcuate wall.
8. The microphone boom structure of claim 5, wherein the front pickup channel is planar on a side of the front arcuate wall.
9. The microphone boom structure of claim 5, wherein the rear pickup channel is planar on a side of the rear arcuate wall.
10. The microphone boom structure of claim 5, wherein the width of the front sound pickup channel or the width of the rear sound pickup channel gradually decreases from the first front sound inlet or the first rear sound inlet toward the center thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320626651.6U CN219678644U (en) | 2023-03-27 | 2023-03-27 | Unidirectional microphone straw structure capable of reducing wind noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320626651.6U CN219678644U (en) | 2023-03-27 | 2023-03-27 | Unidirectional microphone straw structure capable of reducing wind noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219678644U true CN219678644U (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320626651.6U Active CN219678644U (en) | 2023-03-27 | 2023-03-27 | Unidirectional microphone straw structure capable of reducing wind noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219678644U (en) |
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2023
- 2023-03-27 CN CN202320626651.6U patent/CN219678644U/en active Active
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