Wind noise resistant earphone structure

Abstract

The utility model discloses a wind noise resistant earphone structure, which comprises a shell, a PCB (printed circuit board), a microphone sleeve and a microphone. The wind-proof cavity is of a bent structure, the first screen cloth is arranged at the communication position of the input end of the wind-proof cavity and the pickup hole, the second screen cloth is arranged at the communication position of the output end of the wind-proof cavity and the sound receiving hole, attenuation of the two layers of screen cloth is achieved, the wind-proof cavity is of the bent structure, and the channel distance is long. Air entering the cavity through the pickup hole can be greatly reduced, even if a small amount of air enters the cavity, the flow rate of the small amount of air is greatly reduced under the action of the bent windproof cavity, finally, wind noise airflow reaching the microphone is less, the flow rate of the airflow is very slow, the influence of the airflow on the microphone is reduced, and the performance of the microphone is improved. Therefore, the overall performance of the earphone is improved, the call use experience of a user is improved, no large wind noise is generated even if the earphone is used outdoors, the use experience of the user is improved, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to earphone field technology especially is a kind of earphone structure of wind noise resistance. BACKGROUND

[0002] With the improvement of people's living standards, more and more people start to buy Bluetooth headset to listen to high-quality music and for calls, and the headset is used outdoors, which will be affected by the wind. When using the headset to make a call or listen to music, wind noise often becomes an interference. Especially outdoors, the influence of the wind may make your voice unclear, affecting the call quality or listening experience. Then, how to eliminate or reduce the wind noise in the earphone? First, wind noise is a form of high-frequency noise, especially when the microphone hole of the earphone is in the windward direction, wind noise is particularly noticeable. Since the wind comes from all directions, when wind noise enters the channel through the earphone pickup hole, and then enters the sound hole of the microphone unit, and the air cannot be effectively discharged from the cavity, the air pressure in the cavity will increase, which will affect the pickup effect of the microphone, resulting in poor call quality of the earphone.

[0003] The existing earphone adopts a straight-line type pickup channel, and the straight-line type pickup channel has a large pickup volume and good call quality, but the straight-in design increases the amount of wind noise, resulting in poor wind noise resistance effect. To reduce the influence of wind noise, most manufacturers will attenuate a part of wind noise through the mesh between the lower shell of the earphone and the microphone magnet. When the wind blows into the sound cavity from the earphone pickup hole, most of the wind noise will still directly penetrate into the cavity, causing the microphone to receive too much wind noise. Therefore, the wind noise resistance effect is not ideal, which seriously affects the user experience, has poor practicality, and has a small application range. Therefore, it is necessary to improve the existing earphone wind noise resistance structure. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides an earphone structure with wind noise resistance, which can effectively solve the problem that the existing earphone wind noise resistance structure has very limited wind noise resistance ability when the external wind noise is large, and produces a lot of wind noise when used outdoors, making it difficult for users to clearly hear the content of the sound, seriously affecting the user experience and having a small application range.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The application discloses an anti-wind-noise earphone structure which comprises a shell, a PCB board, a microphone sleeve and a microphone.

[0007] As a preferred scheme, the bottom end surface of the receiving groove is concavely provided with a limiting groove, and the lower end of the microphone sleeve is protrusively provided with a limiting part.

[0008] As a preferred scheme, the limiting groove is horizontally and intervally arranged in two, and correspondingly, the limiting part is also horizontally and intervally arranged in two.

[0009] As a preferred scheme, the windproof cavity is in L shape.

[0010] As a preferred scheme, the windproof cavity comprises a first channel and a second channel which are sequentially communicated from outside to inside, the first channel forms an included angle alpha with the pickup hole, and the second channel forms an included angle beta with the sound collection hole.

[0011] As a preferred scheme, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixedly combined to form the aforementioned receiving groove.

[0012] Compared with the prior art, the application has obvious advantages and beneficial effects, specifically speaking, the above technical scheme can know that:

[0013] By the windproof cavity is curved structure, and the input end of the windproof cavity and the pickup hole are communicated, the first mesh cloth is arranged on the communicated place, the output end of the windproof cavity and the sound collecting hole are communicated, the second mesh cloth is arranged on the communicated place, the attenuation of the two layers of mesh cloths, and the windproof cavity is curved structure, the longer channel distance can greatly reduce the air entering the cavity through the pickup hole, even if a small amount of air enters, the flow rate of the small amount of air will be greatly reduced under the action of the bending windproof cavity, finally the wind noise airflow reaching the microphone is less, and the flow rate of the airflow is very slow, thereby reducing the influence of the airflow on the microphone, improving the performance of the microphone, and improving the overall performance of the earphone, improving the use experience of the user in communication, even if used outdoors, the wind noise is not large, the use experience of the user is improved, and the application range is wide.

[0014] In order to more clearly set forth the structural features and functions of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of the preferred embodiment of the present application;

[0016] Figure 2 is a schematic diagram of a test device;

[0017] Figure 3 is a schematic diagram of wind noise test in different directions;

[0018] Figure 4 is a test curve diagram of the conventional scheme and the preferred embodiment of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 10, shell 101, sound guide groove

[0021] 102, storage groove 103, pickup hole

[0022] 104, limiting groove 11, upper shell

[0023] 12, lower shell 20, PCB

[0024] 21, sound collecting hole 30, microphone sleeve

[0025] 31, windproof cavity 311, first channel

[0026] 312, second channel 32, limiting portion

[0027] 40, microphone 41, sound inlet hole

[0028] 51, first mesh cloth 52, second mesh cloth DETAILED DESCRIPTION

[0029] Please refer to Figure 1 The specific structure of the preferred embodiment of the utility model is shown in the figure, which comprises a shell 10, a PCB 20, a microphone sleeve 30 and a microphone 40.

[0030] The outer side of the shell 10 is concave and has a sound guide groove 101, the shell 10 has a receiving groove 102, and the inner wall of one side of the receiving groove 102 is provided with a sound pickup hole 103, which is in communication with the sound guide groove 101; in this embodiment, the bottom end surface of the receiving groove 102 is concave and has a limiting groove 104, which is horizontally spaced apart; and the shell 10 comprises an upper shell 11 and a lower shell 12, which are fixed and cooperatively form the aforementioned receiving groove 102.

[0031] The PCB 20 is arranged in the receiving groove 102, and the PCB 20 is provided with a sound collecting hole 21.

[0032] The microphone sleeve 30 is arranged on one side of the receiving groove 102 and close to the PCB 20, and the microphone sleeve 30 is provided with a windproof cavity 31, the input end of the windproof cavity 31 is in communication with the sound pickup hole 103, the output end of the windproof cavity 31 is in communication with the sound collecting hole 21, the windproof cavity 31 is a curved structure, the input end of the windproof cavity 31 is provided with a first gauze cloth 51 at the communication position with the sound pickup hole 103, the first gauze cloth 51 covers the input end of the windproof cavity 31, the output end of the windproof cavity 31 is provided with a second gauze cloth 52 at the communication position with the sound collecting hole 21, the second gauze cloth 52 covers the output end of the windproof cavity 31; in this embodiment, the lower end of the microphone sleeve 30 is downwardly protruding and has a limiting portion 32, which is cooperatively limited with the limiting groove 104, and the limiting portion 32 is also horizontally spaced apart; in addition, the windproof cavity 31 is L-shaped, specifically, the windproof cavity 31 comprises a first channel 311 and a second channel 312 which are sequentially in communication from outside to inside, the first channel 311 forms an included angle α with the sound pickup hole 103, and the second channel 312 forms an included angle β with the sound collecting hole 21.

[0033] The microphone 40 is arranged on the PCB 20 and connected with the PCB 20, and the microphone 40 has a sound inlet hole 41 which is in communication with the sound collecting hole 21.

[0034] In order to verify the feasibility and superiority of the technical scheme of the utility model patent application, a laboratory equipment is built, details are shown in Figure 2 , objective tests are carried out to verify the effectiveness of the technical scheme of the utility model patent application for wind noise resistance:

[0035] 1. An acoustic anechoic chamber is used to ensure that the background noise of the test environment is 20dB(A) or below;

[0036] 2, build Soundcheck acoustics tester system;

[0037] 3, the earphone is worn in the artificial ear of the dummy, and normal wearing is simulated;

[0038] 4, the wind noise box is opened to blow, various wind noises are simulated, and the earphone pickup hole receives the sound signal of the wind pressure;

[0039] 5, the earphone receives the sound signal, the Soundcheck system records, and saves an audio segment;

[0040] 6, run the Adobe Audition software on the computer, convert the recording file to generate a frequency response curve;

[0041] 7, the frequency response curves of the new scheme and the conventional scheme are tested, and objective comparison is made.

[0042] At the same time, in order to comprehensively verify and compare the effectiveness of the new scheme against wind noise, two modes of blowing from the front and blowing from the side of the test dummy are set, and details are shown in Figure 3 , and the wind speed is tested in two modes of 3m / s and 5m / s.

[0043] Use the Adobe Audition software to generate a frequency response curve interface to analyze the test results, blow from the front and blow from the side, respectively, use two wind speeds, a total of four test curve graphs, details are shown in Figure 4 . The right side of the curve graph X axis represents the frequency Hz, the lower Y axis represents the sound pressure dB value generated by the wind noise, the red curve is the conventional structure, the blue is the new anti-wind noise structure, and the two are compared.

[0044] From the final test comparison of different wind noise directions and wind speed sizes, especially in the effective frequency range of 500-3000Hz of the talker, the conventional scheme (red curve) is much higher than the technical scheme of the utility model patent application (blue curve) in the wind noise frequency area, more than 10dB, which fully shows that the technical scheme of the utility model patent application can receive less wind pressure and reduce the influence of the wind noise scene on the microphone pickup in comparison with the conventional scheme, and also fully shows that the subjective experience of the earphone in use will be much better than the same type of product with the conventional structure.

[0045] The double-mesh cloth design and the L-shaped windproof cavity structure not only greatly help to resist wind noise, but also improve the microphone sealing and waterproof to a certain extent. The so-called microphone sealing refers to that the microphone unit receives external signals through the earphone internal structure pipeline, and the internal structure cannot have a poor sealing problem to cause sound leakage. The sound leakage will also cause the microphone to pick up signals when the earphone internal speaker plays audio signals, which is the so-called echo problem of the earphone in the call. The reason for the microphone sealing is mainly that the gaps between the sound pickup hole shell wall and the microphone sleeve and between the microphone sleeve and the PCBA are prone to sealing problems. If the structure sealing is not good, air leakage will occur.

[0046] The first mesh cloth 51 is firmly and reliably bonded and fixed to the inner wall of the storage groove 102 by the adhesion of the double-sided adhesive, and the second mesh cloth 52 is also bonded and fixed to the PCBA 20 and the microphone sleeve 30 by the double-sided adhesive to achieve a more ideal sealing and effectively solve the echo problem in the call.

[0047] For improving the waterproof function of the product, a single mesh cloth can play a certain role in intercepting the splashing and flushing water in the waterproof test, but when the water flow is gathered, part of the water will flow into the mesh cloth and the microphone channel in the sound pickup hole. The L-shaped windproof cavity structure of the utility model has the advantages of long travel and bending, can effectively relieve part of the water pressure, and finally attenuate the remaining water flow on the second mesh cloth. At present, the earphone product with IPX4 / IPX5 requirements adopts a double-layer microphone mesh structure with a mesh number of more than 300, and the probability of passing the waterproof test is high, while the single-layer microphone mesh basically has problems.

[0048] The design of the utility model focuses on the following: the windproof cavity is a curved structure, the first mesh cloth is arranged on the communication position between the input end of the windproof cavity and the sound pickup hole, the second mesh cloth is arranged on the communication position between the output end of the windproof cavity and the sound pickup hole, the two layers of mesh cloths are attenuated, the windproof cavity is a curved structure, and the long channel distance can greatly reduce the air entering the cavity through the sound pickup hole. Even if a small amount of air enters, the flow rate of the small amount of air will be greatly reduced under the action of the bending windproof cavity, the wind noise airflow reaching the microphone is less, the flow rate of the airflow is very slow, the influence of the airflow on the microphone is reduced, the microphone performance is improved, the overall performance of the earphone is improved, the user's call experience is improved, even if used outdoors, the wind noise is not large, the user's experience is improved, and the application range is wide.

[0049] The above merely describes the preferred embodiment of the present application, and is not intended to limit the technical scope of the present application in any way. Any minor modification, equivalent change and modification made according to the technical essence of the present application shall still fall within the scope of the technical scheme of the present application.

Claims

1. A wind noise resistant earphone structure, comprising a shell, a PCB board, a microphone sleeve and a microphone; a sound guide groove is formed in the inner recess of the circumferential side surface of the shell, the shell has a receiving groove therein, and a sound pickup hole is formed in the inner wall of one side of the receiving groove, the sound pickup hole being in communication with the sound guide groove; the PCB board is arranged in the receiving groove, and the PCB board has a sound receiving hole formed therein; the microphone sleeve is arranged on one side of the receiving groove and close to the PCB board, the microphone sleeve is provided with a windproof cavity, the input end of the windproof cavity is in communication with the sound pickup hole, the output end of the windproof cavity is in communication with the sound receiving hole, the windproof cavity is in the shape of L, the windproof cavity comprises a first channel and a second channel which are sequentially in communication from outside to inside, the first channel and the sound pickup hole form an included angle a, and the second channel and the sound receiving hole form an included angle β; the microphone is arranged on the PCB board and connected with the PCB board, the microphone has a sound inlet hole, and the sound inlet hole is in communication with the sound receiving hole; characterized in that: The windproof cavity is a curved structure, a first mesh cloth is arranged on the communication position between the input end of the windproof cavity and the sound pickup hole, the first mesh cloth covers the input end of the windproof cavity, a second mesh cloth is arranged on the communication position between the output end of the windproof cavity and the sound collecting hole, and the second mesh cloth covers the output end of the windproof cavity.

2. The wind noise resistant earphone structure according to claim 1, characterized in that: The bottom end surface of the accommodating groove is concavely provided with a limiting groove, and the lower end of the sleeve is protrudingly provided with a limiting portion downward, which cooperates with the limiting groove to limit.

3. The wind noise resistant earphone structure according to claim 2, characterized in that: The limiting grooves are two horizontally spaced limiting grooves, and correspondingly, the limiting portion is also two horizontally spaced limiting portions.

4. The wind noise resistant earphone structure according to claim 1, characterized by: The shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixedly combined to form the accommodating groove.

Images