CN107864416B - Microphone sound pressure reducing device and electronic equipment - Google Patents
Microphone sound pressure reducing device and electronic equipment Download PDFInfo
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- CN107864416B CN107864416B CN201711353320.5A CN201711353320A CN107864416B CN 107864416 B CN107864416 B CN 107864416B CN 201711353320 A CN201711353320 A CN 201711353320A CN 107864416 B CN107864416 B CN 107864416B
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- 239000000758 substrate Substances 0.000 claims abstract description 37
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 241000380131 Ammophila arenaria Species 0.000 description 1
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001989 nasopharynx Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
- H04R1/086—Protective screens, e.g. all weather or wind screens
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a microphone sound pressure reducing device and an electronic device, the microphone comprises a guide cover and a fixed shell, wherein the guide cover and the fixed shell are sequentially arranged on a substrate from outside to inside; a first sound hole is formed at the joint of the air guide sleeve and the substrate; a first connecting part is connected between the air guide sleeve and the fixed shell; the first connecting part divides the diversion cavity formed between the diversion cover and the fixed shell into a first diversion cavity and a second diversion cavity, the first connecting part is provided with a second sound hole; the sound outside the air guide sleeve passes through the first the sound hole enters the first diversion cavity, and then enter the second through the second sound hole the diversion cavity is to be received by the microphone. In the case of high-speed airflow noise, the microphone sound pressure reducing device attenuates the high-speed airflow noise at least twice and then receives the high-speed airflow noise by the microphone, the pressure acting on the microphone is reduced below the saturation threshold required by the microphone, so that the microphone can realize the purpose of noise reduction by applying a DSP processing technology.
Description
Technical Field
The present invention relates to the field of acoustic technologies, and in particular, to a microphone sound pressure reducing device and an electronic device.
Background
In microphone application in electronic products such as Bluetooth earphone, mobile phone, etc., can produce the air current noise under the loud, high-speed motion and noisy environment condition, the air current noise can mask normal sound collection, influences user's result of use and experience.
In the prior art, a DSP (Digital Signal Processing ) processing technology is mostly adopted to eliminate airflow noise caused by factors such as wind to a microphone, but the precondition of the DSP processing technology is that signals collected by the microphone cannot be saturated, and the microphone with a high saturation threshold is usually at a pressure of about 100pa at 130dB sound pressure. In a high-speed motion scene, airflow noise impacts on a microphone diaphragm at a high speed, for example, the pressure generated by the airflow speed is about 170pa when the speed is close to 60km/h, the speed per hour when the racing car descends can be close to 100km/h, and the pressure generated by the airflow speed is close to 150dB and far exceeds the saturation threshold of a microphone acquisition signal. Therefore, the DSP processing technology is greatly limited, and when the airflow noise pressure is higher than the saturation threshold required by the DSP processing, the sound noise reduction processing cannot be completed.
Disclosure of Invention
The invention provides a microphone sound pressure reducing device and a microphone, which reduce the noise airflow intensity entering the microphone below a required saturation threshold by improving a microphone windproof structure, so that the microphone can realize the purpose of noise reduction by applying a DSP processing technology.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
the sound pressure reducing device of the microphone comprises a substrate for arranging the sound pressure reducing device of the microphone, a guide cover and a fixed shell, wherein the guide cover is sequentially arranged on the substrate from outside to inside; a first sound hole is formed at the joint of the air guide sleeve and the substrate; a first connecting part is connected between the air guide sleeve and the fixed shell; the first connecting part divides a diversion cavity formed between the diversion cover and the fixed shell into a first diversion cavity and a second diversion cavity, and a second sound hole is formed in the first connecting part; sound outside the air guide sleeve enters the first air guide cavity through the first sound hole, and then enters the second air guide cavity through the second sound hole to be received by the microphone.
Preferably, the fixed housing includes a receiving cavity for receiving the microphone; the accommodating cavity comprises a third sound hole for enabling the accommodating cavity to be communicated with the second diversion cavity.
Preferably, the pod comprises an inner shroud and an outer shroud; the inner cover and the outer cover can rotate relatively.
Preferably, the first acoustic port comprises an inner acoustic port and an outer acoustic port; the inner sound hole is arranged at the joint of the inner cover and the substrate, and the outer sound hole is arranged at the joint of the outer cover and the substrate; and the inner sound hole is opposite to the outer sound hole.
Preferably, the microphone sound pressure reducing device further comprises a circular swivel located at the lower side of the base; the substrate is provided with a circular ring groove; the circular swivel is connected with the outer cover through a circular ring groove and is used for driving the outer cover to rotate relative to the inner cover after being driven to rotate.
Preferably, the middle part of the circular swivel is provided with a motor; the motor drives the circular swivel to rotate so as to drive the outer cover to rotate relative to the inner cover, so that the inner sound hole moves relative to the outer sound hole to change the size of the first sound hole; wherein, the interval between the adjacent outer sound holes is larger than or equal to the aperture of the inner sound hole; the first sound hole is formed by overlapping portions of the inner sound hole and the outer sound hole.
Preferably, the microphone sound pressure reducing device further comprises a motion detector and a motor driver; a motion detector for detecting environmental data around the microphone sound pressure reduction device; and the motor driver is used for driving the motor based on the corresponding relation between the environmental data and the preset rotation angle, so that the motor drives the circular swivel to drive the outer cover to rotate relative to the inner cover according to the preset rotation angle.
Preferably, the aperture of the first acoustic aperture is larger than the aperture of the second acoustic aperture.
Preferably, the part of the air guide sleeve positioned in the first air guide cavity is made of elastic materials, and the part of the air guide sleeve positioned in the second air guide cavity is made of rigid materials.
An electronic device is provided, which comprises a microphone sound pressure reducing device; the microphone sound pressure reducing device comprises a substrate for arranging the microphone sound pressure reducing device, a guide cover and a fixed shell, wherein the guide cover is sequentially arranged on the substrate from outside to inside; a first sound hole is formed at the joint of the air guide sleeve and the substrate; a first connecting part is connected between the air guide sleeve and the fixed shell; the first connecting part divides a diversion cavity formed between the diversion cover and the fixed shell into a first diversion cavity and a second diversion cavity, and a second sound hole is formed in the first connecting part; sound outside the air guide sleeve enters the first air guide cavity through the first sound hole, and then enters the second air guide cavity through the second sound hole to be received by the microphone.
Compared with the prior art, the invention has the advantages and positive effects that: the invention provides a microphone sound pressure reducing device and electronic equipment, wherein the microphone sound pressure reducing device comprises a guide cover and a fixed shell, wherein the guide cover is sequentially arranged on a substrate from outside to inside, the fixed shell is used for fixing a microphone on the substrate, a first sound hole is formed at the joint of the guide cover and the substrate, a first connecting part is connected between the guide cover and the fixed shell, a guide cavity formed between the guide cover and the fixed shell is divided into a first guide cavity and a second guide cavity by the first connecting part, and a second sound hole is formed in the first connecting part; under a motion scene or a scene with great wind speed, high-speed airflow noise enters a first diversion cavity after being decelerated through a first sound hole, then enters a second diversion cavity after being decelerated through a second sound hole on a first connecting part, and when the high-speed airflow noise is attenuated twice and then transmitted to a microphone, the pressure acting on the microphone is greatly reduced based on the relation of the air flow over-flattening square and is reduced to be below a required saturation threshold, so that the microphone can realize the purpose of noise reduction by using a DSP processing technology; the sound signal passes through the first sound hole and the second sound hole in turn, and can be based on the air molecule vibration transmission to the second water conservancy diversion intracavity and normally gather by the microphone.
In addition, based on the technical scheme, the invention also provides: the motion detector detects environmental data around the microphone sound pressure reduction device; the motor driver drives the motor based on the corresponding relation between the environmental data and the preset rotation angle, so that the motor drives the circular rotating ring to drive the outer cover to rotate relative to the inner cover according to the preset rotation angle. The outer cover of the air guide sleeve rotates relative to the inner cover, so that the inner sound hole moves relative to the outer sound hole to change the size of the first sound hole; wherein, the interval between the adjacent outer sound holes is larger than or equal to the aperture of the inner sound hole; the first sound hole is formed by overlapping portions of the inner sound hole and the outer sound hole. Therefore, the invention can also change the aperture size of the first sound hole through the preferential structural design of the relative rotation of the inner cover and the outer cover, so that the device can realize the optimal wind prevention and noise reduction under the condition of different speeds. The aperture size of the first sound hole can be automatically and controllably changed, the purpose of automatically and controllably controlling the sound pressure in the sound pressure reducing device of the microphone is achieved accordingly, the intelligent effect is greatly enhanced, and the use experience of a user is improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Drawings
Fig. 1 is a cross-sectional view of a microphone sound pressure reducing device according to the present invention;
FIG. 2 is a schematic view of wind speed energy curves associated with the embodiment of FIG. 1;
fig. 3 is a cross-sectional view of a microphone sound pressure reducing device according to the present invention;
FIG. 4 is a graph of sound recordings in an airflow noise environment associated with the embodiment of FIG. 3;
fig. 5 is a cross-sectional view of a microphone sound pressure reducing device according to another embodiment of the present invention;
FIG. 6 is a schematic diagram showing the relative rotational relationship between the inner and outer sound holes according to the embodiment of FIG. 5;
FIG. 7 is a schematic view of a first acoustic port formed by overlapping an inner acoustic port and an outer acoustic port in the embodiment of FIG. 5 according to the present invention;
fig. 8 is a schematic view of a circular ring groove according to an embodiment of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
As shown in fig. 1, the microphone sound pressure reducing device provided by the invention comprises a substrate 8 for arranging the microphone sound pressure reducing device, wherein the microphone sound pressure reducing device comprises a guide cover 3 and a fixed shell 2, wherein the guide cover 3 is sequentially arranged on the substrate 8 from outside to inside, and the fixed shell 2 is used for fixing the microphone 1 on the substrate 8; a first sound hole 4 is arranged at the joint of the air guide sleeve 3 and the substrate 8; a first connecting part 5 is connected between the air guide sleeve 3 and the fixed shell 2; the first connecting portion 5 divides the flow guiding cavity between the flow guiding cover 3 and the fixed housing 2 into a first flow guiding cavity 71 and a second flow guiding cavity 72, and the first connecting portion is provided with a second sound hole 51.
The fixed housing 2 includes a receiving cavity for receiving the microphone 1, and the receiving cavity is provided with a third sound hole 6, and the third sound hole 6 is used for enabling the receiving cavity to be communicated with the second diversion cavity 72.
The dome 3 may be a hyperbolic, conical or other arc structure, and is preferably made of a rigid material, such as metal, plastic or other materials meeting the rigidity requirement, so as to reduce the space enclosed between the top of the dome 3 and the fixed housing 2, that is, the second dome 72, and to cause a helm hertz resonator, that is, to avoid resonance between the dome 3 and the second dome 72, and to avoid vibration secondary radiation caused by high-speed airflow collision.
The first sound holes 4 may be dense circular holes or holes, slits, etc. formed at the edge of the air guide sleeve 3, small holes, narrow slits, etc. formed between the air guide sleeve 3 and the base 8, or holes, slits, etc. formed at the area of the base 8 connected to the air guide sleeve 3.
The first connecting portion 5 is connected between the pod 3 and the fixed housing 2, and has a plurality of second sound holes 51 formed therein, without limiting the shape thereof. In general, the aperture of the second sound hole 51 is smaller than the aperture of the first sound hole 4, and the acoustic impedance of the second sound hole 51 is realized to be larger than that of the first sound hole 4.
The purpose of the stationary housing 2 is to fix and/or seal the microphone 1 such that sound waves can only be transmitted into the microphone 1 from the third sound hole 6, which is provided in the part of the second flow guiding chamber 72.
The microphone 1 may be of a conventional ECM type, a moving coil type, a MEMS type, or the like, and the present invention is not limited thereto.
The base 8 is a connector for mounting the microphone sound pressure reducing device to a product.
In a moving scene or a scene with a large wind speed, the pressure formula generated by the airflow is p=Wherein P is the air flow overpressure, V is the wind speed, 1600 is the familiar, and the proportional relation between the air flow overpressure and the square of the wind speed is seen; the high-speed airflow noise enters the first diversion cavity after being decelerated through the first sound hole, and the airflow after the attenuation speed enters the second diversion cavity after being decelerated through the second sound hole on the first connecting part, so that the attenuation amount, the pore diameter and the aperture ratio are related, and the airflow is opened according to the design requirement of a product in practical cases; when high-speed airflow noise is attenuated twice and then transmitted to the microphone, the pressure acting on the microphone is greatly reduced based on the relation of the airflow over-flattening square and is reduced to be below a required saturation threshold, so that the microphone can realize the purpose of noise reduction by using a DSP processing technology; the sound signal sequentially passes through the first sound hole and the second sound hole, and is transmitted into the second diversion cavity by utilizing air molecular vibration to be normally collected by the microphone.
As shown in the wind speed energy curve diagram of fig. 2, the implementation is that the airflow noise collected by the microphone is not under any protection condition, the dotted line is that the airflow noise collected by the microphone is collected after the conventional wind-proof material is added, the dotted line is that the airflow noise collected after the microphone sound pressure reducing device is added, and the wind-proof effect of the microphone sound pressure reducing device is optimal.
When the product cost or the appearance is not considered, too many dense first sound holes are formed in the flow guide cover of the appearance part, a mode of attaching damping materials or filling porous materials at positions corresponding to the first sound holes in the flow guide cover can be adopted, so that the air flow noise after the first sound holes are decelerated is further attenuated by the damping materials or the porous materials in a deceleration way; similarly, when the airflow noise is required to be decelerated to a greater degree due to practical application requirements, damping materials can be attached to or filled in the second flow guide cavity, so that the airflow noise enters the sound hole to be received by the microphone after being attenuated for multiple times.
The invention also provides a microphone sound pressure reducing device, which is an improvement for collecting the voice of a wearer on the basis of the microphone sound pressure reducing device shown in fig. 1 and is also an improvement under the condition that the noise of air flow is very large and difficult to inhibit, and as shown in fig. 3, the microphone sound pressure reducing device comprises a substrate 8 for arranging the microphone sound pressure reducing device, wherein the microphone sound pressure reducing device comprises a guide cover 3 and a fixed shell 2, wherein the guide cover 3 is sequentially arranged on the substrate 8 from outside to inside; a first sound hole 4 is arranged at the joint of the air guide sleeve 3 and the substrate 8; a first connecting part 5 is connected between the air guide sleeve 3 and the fixed shell 2; the first connecting part 5 divides the flow guiding cavity between the flow guiding cover 3 and the fixed shell 2 into a first flow guiding cavity 71 and a second flow guiding cavity 72, and a second sound hole 51 is formed in the first connecting part; the part 32 of the air guide sleeve, which is positioned in the second air guide cavity, is made of elastic materials, and the part 31 of the air guide sleeve, which is positioned in the first air guide cavity, is made of rigid materials. There is no requirement in the embodiment of the present invention as to whether the first sound hole is provided at the junction of the pod and the base 8.
When the device is used in a sports scene or a scene with a large wind speed, the air guide cover is positioned at the part 32 of the second air guide cavity, namely the elastic part is tightly attached to the cheek, the throat or the nose of a wearer, so that the airflow noise is blocked by the body part of the wearer and cannot enter the microphone, the vibration of the nasopharynx cavity is transmitted to the elastic part 31 when the wearer speaks, the elastic part 31 is used as an excitation source to make secondary radiation of sound waves to the second air guide cavity 72 after vibrating along with the contact part of the wearer, when the vibration source has a large amplitude, such as vibration at the throat position, the secondary radiation low-frequency energy of vibration is large, the sound is choked after being collected, the sound can be finely adjusted through the second sound holes 51 formed in the first connecting part 5, and the number of the second sound holes 51 is 1 or 2, but the number is not limited.
As shown in fig. 4, the upper part is the microphone recording, the lower part is the recording of the microphone sound pressure reducing device in the embodiment shown in fig. 3, which is close to the throat of the wearer, the oval wire frame represents the voice, and the rectangular wire frame represents the noise, it can be seen that the voice is improved and the airflow noise is well suppressed in the recording of the microphone sound pressure reducing device in the embodiment of the invention.
As a preferred embodiment, the number and/or the aperture of the first sound holes 4 can be changed to realize different acoustic impedances, and the effect of noise suppression can also be different, specifically, the microphone sound pressure reducing device shown in fig. 5 comprises a substrate 8 for arranging the microphone sound pressure reducing device, wherein the microphone sound pressure reducing device comprises a guide cover 3 and a fixed shell 2, and the guide cover 3 is sequentially arranged on the substrate 8 from outside to inside, and the fixed shell is used for fixing the microphone 1 on the substrate 8; a first sound hole 4 is arranged at the joint of the air guide sleeve 3 and the substrate 8; a first connecting part 5 is connected between the air guide sleeve 3 and the fixed shell 2; the first connecting part 5 divides the flow guiding cavity between the flow guiding cover 3 and the fixed shell 2 into a first flow guiding cavity 71 and a second flow guiding cavity 72, and a second sound hole 51 is formed in the first connecting part; wherein the air guide sleeve 3 comprises an inner cover 33 and an outer cover 34, and the inner cover 33 and the outer cover 34 can rotate relatively, and the actual application number and/or the aperture size of the first sound holes 4 can be changed through changing the relative positions.
For example, the inner cover 33 is provided with strip-shaped sound holes with larger distance, the outer cover 34 is provided with parallel small sound holes with dense intervals, the overlapped part of the small sound holes and the strip-shaped sound holes is used as the first sound holes 4, and when the inner cover 33 and the outer cover 34 relatively rotate to change the relative positions, the overlapped quantity of the small sound holes and the strip-shaped sound holes is changed, so that the actual application quantity of the first sound holes 4 is changed.
Preferably, as shown in fig. 6, the first sound holes include an inner sound hole 41 shown in broken lines and an outer sound hole 42 shown in solid lines in the drawing; the inner sound hole 41 is arranged at the joint of the inner cover 33 and the substrate 8, and the outer sound hole 42 is arranged at the joint of the outer cover 34 and the substrate 8; and the inner sound hole 41 is opposite to the outer sound hole 42. The spacing D between adjacent outer acoustic holes 42 is equal to or greater than the aperture of the inner acoustic hole 41, the first sound hole 4 is formed by overlapping portions of the inner sound hole 41 and the outer sound hole 42, as shown by thick solid lines in fig. 7. The angle of relative rotation of the inner and outer covers 33 and 34 is defined at a predetermined angleInside, at the preset angle +.>The rotation realizes the change of the aperture of the first sound hole, the preset angle +.>The size of the sound hole is determined by the distance between the two holes and the aperture size of the inner sound hole and the outer sound hole, and the sound hole is preset according to the actual application condition.
To better achieve relative rotation between the inner and outer shrouds 33, 34, in the present embodiment, as shown in fig. 5, the device further comprises a circular swivel 9 positioned on the lower side of the base 8; as shown in the plan view of the substrate shown in fig. 8, the substrate 8 is provided with a circular ring groove 10 (as shown by a thin solid line in the figure), the circular rotating ring 9 is connected with the outer cover 34 through the circular ring groove 10, and is used for driving the outer cover 34 to rotate relative to the inner cover 33 after being driven to rotate, and the inner cover 33 is fixed on the substrate 8.
A motor 11 is arranged in the middle of the circular swivel 9; the motor 11 drives the circular swivel 9 to rotate to drive the outer cover 34 to rotate relative to the inner cover 33, so that the inner sound hole 41 moves relative to the outer sound hole 42 to change the size of the first sound hole.
In the embodiment of the invention, the microphone sound pressure reducing device also comprises a motion detector 12 and a motor driver 13; the motion detector 12 is used for detecting the environmental data around the microphone sound pressure reduction device and sending the environmental data to the motor to drive the motor 13; the motor driver 13 drives the motor 11 based on the corresponding relation between the environmental data and the preset rotation angle, so that the motor 11 drives the circular swivel 9 to drive the outer cover 34 to rotate relative to the inner cover 33 according to the preset rotation angle. Different environment data correspond to different preset rotation angles, for example, when the electronic equipment with the microphone sound pressure reducing device is worn for high-speed operation, different speeds correspond to different environment data, and then the device can change the internal sound pressure intensity by changing the size of the first sound hole under the condition of different speeds by changing the size of the first sound hole, so that the purposes of wind prevention and noise reduction are realized.
Based on the microphone sound pressure reducing device, the invention also protects an electronic device comprising or applying the microphone sound pressure reducing device, such as a mobile phone, a Bluetooth headset and the like, under the condition that a sports scene or a big wind field Jing Zao is high-speed airflow noise, the microphone sound pressure reducing device receives the high-speed airflow noise through at least two attenuations based on the design structures of a guide cover, a first sound hole, a second sound hole on a first connecting part and the like, so that the pressure acting on the microphone is greatly reduced based on the relation of the airflow flattening square, and the pressure is reduced to be below a required saturation threshold, and therefore, the microphone can apply a DSP processing technology to realize the purpose of noise reduction. Under the condition that the airflow noise is very high, the microphone sound pressure reducing device is closely attached to the throat, the nose or the cheek of a wearer, and the voice emitted by the wearer acts on the microphone through secondary radiation of the elastic part and fine adjustment of the second sound holes on the porous part, so that on one hand, the airflow noise is reduced, and on the other hand, the voice information acquisition effect is also improved; furthermore, the invention can also change the aperture size of the first sound hole through the optimal structural design of the relative rotation of the inner cover and the outer cover, so that the device can realize the optimal wind prevention and noise reduction under the condition of different speeds. The aperture size of the first sound hole can be automatically and controllably changed, the purpose of automatically and controllably controlling the sound pressure in the sound pressure reducing device of the microphone is achieved accordingly, the intelligent effect is greatly enhanced, and the use experience of a user is improved.
It should be noted that the above description is not intended to limit the invention, but rather the invention is not limited to the above examples, and that variations, modifications, additions or substitutions within the spirit and scope of the invention will be within the scope of the invention.
Claims (10)
1. The sound pressure reducing device of the microphone comprises a substrate and is characterized by further comprising a guide cover and a fixed shell, wherein the guide cover is sequentially arranged on the substrate from outside to inside, and the fixed shell is used for fixing the microphone on the substrate;
a first sound hole is formed at the joint of the air guide sleeve and the substrate;
a first connecting part is connected between the air guide sleeve and the fixed shell; the first connecting part divides a diversion cavity formed between the diversion cover and the fixed shell into a first diversion cavity and a second diversion cavity, and a second sound hole is formed in the first connecting part;
sound outside the air guide sleeve enters the first air guide cavity through the first sound hole, and then enters the second air guide cavity through the second sound hole so as to be received by the microphone.
2. The microphone sound pressure reducing device of claim 1, wherein the stationary housing includes a receiving cavity for receiving the microphone; the accommodating cavity comprises a third sound hole for enabling the accommodating cavity to be communicated with the second diversion cavity.
3. The microphone sound pressure reducing device of claim 1, wherein the pod comprises an inner cover and an outer cover; the inner cover and the outer cover can rotate relatively.
4. The microphone sound pressure reducing device of claim 3, wherein the first sound hole comprises an inner sound hole and an outer sound hole; the inner sound hole is arranged at the joint of the inner cover and the substrate, and the outer sound hole is arranged at the joint of the outer cover and the substrate.
5. The microphone sound pressure reducing device of claim 4, further comprising a circular swivel under the base; the substrate is provided with a circular ring groove;
the circular swivel is connected with the outer cover through the circular ring groove and is used for driving the outer cover to rotate relative to the inner cover after being driven to rotate.
6. The microphone sound pressure reducing device according to claim 5, wherein a motor is provided in the middle of the circular swivel; the motor drives the circular swivel to rotate so as to drive the outer cover to rotate relative to the inner cover, so that the inner sound hole moves relative to the outer sound hole to change the size of the first sound hole; wherein the spacing between adjacent outer sound holes is larger than or equal to the aperture of the inner sound hole; the first sound hole is formed by overlapping portions of the inner sound hole and the outer sound hole.
7. The microphone sound pressure reduction device of claim 6, further comprising a motion detector and a motor driver;
the motion detector is used for detecting environmental data around the microphone sound pressure reducing device;
the motor driver is used for driving the motor based on the corresponding relation between the environmental data and the preset rotation angle, so that the motor drives the circular swivel to drive the outer cover to rotate relative to the inner cover according to the preset rotation angle.
8. The microphone sound pressure reducing device of claim 1, wherein the first sound hole has a larger aperture than the second sound hole.
9. The microphone sound pressure reducing device of claim 1, wherein the portion of the pod located in the first pod is made of an elastic material, and the portion of the pod located in the second pod is made of a rigid material.
10. An electronic device comprising a microphone sound pressure reducing device according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711353320.5A CN107864416B (en) | 2017-12-15 | 2017-12-15 | Microphone sound pressure reducing device and electronic equipment |
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| CN201711353320.5A CN107864416B (en) | 2017-12-15 | 2017-12-15 | Microphone sound pressure reducing device and electronic equipment |
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| CN107864416A CN107864416A (en) | 2018-03-30 |
| CN107864416B true CN107864416B (en) | 2024-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112637738B (en) * | 2018-04-26 | 2022-10-21 | 深圳市韶音科技有限公司 | Earphone system |
| US11051094B2 (en) | 2019-10-25 | 2021-06-29 | Shore Acquisition Holdings, Inc. | Interchangeable port acoustical cap for microphones |
| CN112073864B (en) * | 2020-09-07 | 2022-06-24 | 声威士通讯(深圳)有限公司 | Acoustic noise reduction device |
| CN113784252B (en) * | 2021-10-28 | 2022-10-18 | 歌尔科技有限公司 | Earphone and TWS earphone |
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| KR200380429Y1 (en) * | 2005-01-17 | 2005-03-31 | 박호선 | Microphone noise eliminating apparatus |
| WO2010051707A1 (en) * | 2008-11-07 | 2010-05-14 | 歌尔声学股份有限公司 | Silicon microphone |
| CN205378215U (en) * | 2015-12-08 | 2016-07-06 | 歌尔声学股份有限公司 | Directional MEMS microphone |
| CN106878839A (en) * | 2017-02-28 | 2017-06-20 | 歌尔股份有限公司 | Windproof device and the electronic equipment of making an uproar of microphone |
| CN207820148U (en) * | 2017-12-15 | 2018-09-04 | 歌尔科技有限公司 | Sound suppression devices and electronic equipment drop in microphone |
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