A pickup structure

Abstract

This utility model relates to the field of sound pickup equipment technology, specifically a sound pickup structure. The sound pickup structure includes a housing with an internal cavity and a through-hole first channel; a circuit board disposed within the cavity; and microphones, with multiple microphones arranged in an array on the circuit board, each microphone having a pickup element and a through-hole second channel within the pickup element. The first and second channels are interconnected. By arranging multiple microphones in an array on the circuit board, omnidirectional sound pickup is achieved. Furthermore, the first channel on the housing serves as the primary channel, maximizing the decibel level of sound pickup. The through-hole second channel within the pickup element, with the microphone pickup element tightly fitted so that the bottom of the second channel faces the microphone, reduces multiple reverberations and bounces of audio within the cavity, minimizes the inflow of noise from unintended directions, and results in better sound pickup performance.

Description

Technical Field

[0001] This utility model relates to the field of sound pickup equipment technology, specifically a sound pickup structure. Background Technology

[0002] Microphone pickup and reception refers to the process by which a microphone converts sound wave signals into electrical signals through its transducer. Its core function is to capture and transmit sound. Most existing products use 2-4 microphones for pickup and reception. Due to the diversity of their designs, the following problems often arise during use:

[0003] Because the sound pickup effect varies in different directions, the sound pickup of the product fluctuates. In addition, the existing product will reflect and absorb the sound waves multiple times in the sound cavity during the sound pickup process. Even if the sound source stops emitting sound, the sound will continue to exist for a period of time due to reflection, which can easily cause sound reverberation. Utility Model Content

[0004] The purpose of this invention is to propose a sound pickup structure that aims to solve the technical problem of poor sound pickup effect in existing microphone products.

[0005] To achieve the above objectives, this utility model proposes a sound pickup structure, including a housing with an internal cavity, and a through first sound channel on the housing.

[0006] A circuit board disposed within the receiving cavity;

[0007] The circuit board has multiple microphones arranged in an array, and each microphone has a pickup element. The pickup element has a through second channel, and the first channel and the second channel are interconnected.

[0008] Preferably, the second channel is a cylinder with equal upper and lower diameters; the top of the housing has a through first channel, which is located directly above the second channel.

[0009] Preferably, the second channel includes a first sound transmission channel and a second sound transmission channel connected in sequence, the second sound transmission channel being disposed above the microphone, and the first sound transmission channel being disposed above the second sound transmission channel.

[0010] Both the first and second sound transmission channels are cylindrical, and the diameter of the first sound transmission channel is greater than the diameter of the second sound transmission channel.

[0011] The top of the housing is provided with the first sound channel, which is located directly above the first sound transmission channel and the two are connected to each other. The diameter of the first sound channel is equal to the diameter of the first sound transmission channel.

[0012] Preferably, the second channel includes a first sound transmission channel and a second sound transmission channel connected in sequence, the second sound transmission channel being disposed above the microphone, and the first sound transmission channel being horizontally disposed on either side of the top of the second sound transmission channel.

[0013] The first sound channel is provided on the side of the housing. The first sound channel is connected to the outlet end of the first sound transmission channel, and the diameter of the first sound channel is equal to the diameter of the first sound transmission channel.

[0014] Preferably, the middle of the top of the housing is recessed downward to form a receiving groove for accommodating the display device;

[0015] From the edge of the top of the housing to the receiving groove, the top of the housing is in the shape of an upwardly protruding arc, and the top of the arc-shaped housing is provided with a through first sound channel, such that: from the side near the edge of the housing to the side away from the edge of the housing, the outlet end of the first sound channel is inclined upward.

[0016] The tilt direction of the outlet end of the second channel is the same as the tilt direction of the outlet end of the first channel.

[0017] Preferably, the microphones on the circuit board are arranged in a circular array, and the central angles between two adjacent microphones are equal.

[0018] Preferably, the housing is made of plastic; the microphone is made of silicone.

[0019] Preferably, the microphone is a silicon microphone.

[0020] Preferably, a dustproof cover is also fitted on the outside of the housing.

[0021] Preferably, the dustproof cover is made of polyester fabric.

[0022] The sound pickup structure disclosed in this utility model has the following beneficial effects: it enables omnidirectional sound pickup by setting multiple microphones in an array on the circuit board; in addition, the housing has a first channel as the main channel, which can maximize the sound pickup decibels; the inside of the pickup component has a through second channel, and the microphone pickup component is tightly fitted so that the bottom end of the second channel faces the microphone, which can reduce the reverberation of audio multiple times in the sound cavity, reduce the inflow of noise from non-specific directions, and improve the sound pickup effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the pickup structure of this utility model;

[0025] Figure 2 This is a cross-sectional structural diagram of the pickup structure of this utility model;

[0026] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0027] Figure 4 This is a cross-sectional structural diagram of one embodiment of the sound transmission element in the sound pickup structure of this utility model;

[0028] Figure 5 This is a cross-sectional structural diagram of another embodiment of the sound transmission element in the sound pickup structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the external structure of the sound transmission element in another embodiment of the sound pickup structure of this utility model.

[0030] Figure 7 This is a cross-sectional structural diagram of another embodiment of the sound transmission element in the sound pickup structure of this utility model;

[0031] Figure 8 This is a schematic diagram of the internal structure of the pickup structure of this utility model;

[0032] Figure 9 This is a diagram showing the microphone and different forms of second channel combinations in the pickup structure of this utility model;

[0033] Figure 10 for Figure 9 Frequency response under different combinations.

[0034] In the attached diagram: 1-housing, 11-first channel, 12-accommodating slot, 2-circuit board, 3-microphone, 4-sound pickup, 41-second channel, 411-first sound transmission channel, 412-second sound transmission channel, 413-sound transmission channel one, 414-sound transmission channel two, 5-dustproof isolation cover.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] like Figures 1 to 8 As shown, a sound pickup structure includes a housing 1, which has an internal cavity, and the housing 1 is provided with a through first sound channel 11.

[0040] Circuit board 2 is disposed within the receiving cavity;

[0041] Microphone 3, a plurality of microphones 3 are arranged in an array on the circuit board 2, and each microphone 3 is provided with a pickup element 4, and a through second channel 41 is opened in the pickup element 4, and the first channel 11 and the second channel 41 are interconnected.

[0042] The sound pickup structure in this solution mainly includes a housing 1, a circuit board 2, and a microphone 3. Both the circuit board 2 and the microphone 3 are housed within the cavity of the housing 1, with the microphone 3 handling the sound pickup. Since the circuit board 2 has multiple microphones 3 arranged in an array, the sound pickup structure of this solution can perform omnidirectional sound pickup. Furthermore, the housing 1 has a first channel 11 as the main channel, which can maximize the sound pickup decibels. The pickup component 4 has a through-type second channel 41 inside, and the microphone 3 and pickup component 4 are tightly fitted together, with the bottom end of the second channel 41 facing the microphone 3. This reduces multiple reverberations of audio within the acoustic cavity and reduces the inflow of noise from unspecified directions, resulting in better sound pickup performance.

[0043] Furthermore, the second channel 41 is a cylinder with equal upper and lower diameters; the top of the housing 1 has a through first channel 11, which is located directly above the second channel 41.

[0044] This is the first embodiment of the pickup element 4 in this solution, such as Figure 4 and Figure 9 As shown in group a, this embodiment represents the best sound pickup performance. In this embodiment, the pickup element 4 is a single-segment structure with equal upper and lower diameters. The pickup element 4 has a through-type second channel 41 inside, and the first channel 11 on the housing 1 is located at its top. The pickup element 4 is positioned above the microphone 3, allowing external sounds to be transmitted to the microphone 3 through the first channel 11 and the second channel 41. This increases sound pickup accuracy, improves decibel levels, and raises the resonance frequency, effectively preventing resonance during use and resulting in a high sound pickup effect. In actual production, the diameter of the through-type first channel 11 is typically around 1.2 mm, and its length is around 7.5 mm.

[0045] according to Figure 10 The test results show that by adjusting the structure of the second channel, the pickup structure accurately controls the various frequencies of the received sound within a regular fluctuation. This solution also uses the LMS Virtual.Lab acoustic simulation platform to... Figure 3 The sound cavity of the sound transmission component was simulated using a 3D model. According to the simulation results, the resonant frequency point can be controlled at 14.5kHz, which is not common in daily life, and the sound pressure level also increased from 94dB@1kHz to 98.7dB@4kHz.

[0046] Furthermore, the second channel 41 includes a first sound transmission channel 411 and a second sound transmission channel 412 connected in sequence, the second sound transmission channel 412 being disposed above the microphone 3, and the first sound transmission channel 411 being disposed above the second sound transmission channel 412.

[0047] Both the first sound transmission channel 411 and the second sound transmission channel 412 are cylindrical, and the diameter of the first sound transmission channel 411 is greater than the diameter of the second sound transmission channel 412.

[0048] The top of the housing 1 is provided with the first sound channel 11, which is located directly above the first sound transmission channel 411 and the two are connected to each other. The diameter of the first sound channel 11 is equal to the diameter of the first sound transmission channel 411.

[0049] This is the second embodiment of the pickup element 4 in this solution, as follows: Figure 5 and Figure 9 As shown in group e, in this embodiment, the pickup element 4 has a two-section structure with vertical distribution. The first section has a first sound transmission channel 411 inside, and the second section has a second sound transmission channel 412 inside. At this time, the first channel 11 on the housing 1 is located at its top. The pickup element 4 is located at the top of the microphone 3. The second sound transmission channel 412 is connected to the microphone 3, and the first sound transmission channel 411 is connected to the first channel 11 of the housing 1. External sounds are transmitted to the microphone 3 through the first channel 11, the first sound transmission channel 411, and the second sound transmission channel 412, resulting in good sound pickup effect.

[0050] In this embodiment, the diameter of the first sound transmission channel 411 needs to be larger than the diameter of the second sound transmission channel 412 to achieve a better sound pickup effect. If the diameter of the first sound transmission channel 411 is smaller than the diameter of the second sound transmission channel 412; or if a third sound transmission channel with a smaller diameter than the first sound transmission channel 411 is added above the first sound transmission channel 411, such as... Figure 9 As shown in groups b, c, and d, none of them will achieve good sound pickup, resulting in the pickup element 4 receiving a lot of noise and echo.

[0051] Furthermore, the second channel 41 includes a first sound transmission channel 413 and a second sound transmission channel 414 connected in sequence. The second sound transmission channel 414 is disposed above the microphone 3, and the first sound transmission channel 413 is horizontally disposed on either side of the top of the second sound transmission channel 414.

[0052] The housing 1 has a first sound channel 11 on its side, which is connected to the outlet end of the sound transmission channel 413, and the diameter of the first sound channel 11 is equal to the diameter of the sound transmission channel 413.

[0053] This is the third embodiment of the pickup element 4 in this solution, as follows: Figure 6-7 as well as Figure 9As shown in group f, in this embodiment, the top of the pickup element 4 is bent to either side to form a first sound transmission channel 413 and a second sound transmission channel 414 that are interconnected. In order to adapt to the pickup element 4 with the above structure, the first channel 11 on the housing 1 is opened on the side of the housing 1. The pickup element 4 is set on the upper end of the microphone 3, so that the second sound transmission channel 414 is connected to the microphone 3, and the first sound transmission channel 413 is connected to the first channel 11 of the housing 1. External sound can be transmitted to the microphone 3 through the first channel 11, the first sound transmission channel 413, and the second sound transmission channel 414, resulting in a better sound pickup effect.

[0054] In this embodiment, the diameters of the first sound transmission channel 413 must be the same. If the first sound transmission channel 413 is a two-segment structure with different diameters, and the diameter of the first segment connected to the first sound channel 11 is less than the diameter of the second segment connected to the second sound transmission channel 414, then... Figure 9 As shown in group g, it will not be able to improve the sound pickup effect well.

[0055] Furthermore, the middle part of the top of the housing 1 is recessed downward to form a receiving groove 12 for accommodating the display device;

[0056] From the edge of the top of the housing 1 to the receiving groove 12, the top of the housing 1 is in the shape of an upwardly protruding arc. The top of the arc-shaped housing 1 is provided with a through first sound channel 11, such that: from the side near the edge of the housing 1 to the side away from the edge of the housing 1, the outlet end of the first sound channel 11 is inclined upward.

[0057] The tilt direction of the outlet end of the second channel 41 is the same as the tilt direction of the outlet end of the first channel 11.

[0058] In actual production, the resonant point position is determined with reference to the Helmholtz resonance. The ideal acoustic path design for the first channel 11 is a short distance (total acoustic path length <10mm) and a large diameter (gasket opening diameter >1mm, 1.3~1.5mm is recommended). This design has little additional impact on the frequency response of the microphone 3 and provides an external frequency response within the main audio acquisition segment.

[0059] In addition, such as Figure 1 As shown, the housing 1 has a receiving groove 12 in the middle, and a display device such as a display screen electrically connected to the circuit board 2 is installed in the receiving groove 12. From the edge of the housing 1 to the receiving groove 12, the top of the housing 1 is arc-shaped, that is, the top of the housing 1 is an arc-shaped curved surface. Since the outlet end of the first channel 11 passes through the top of the housing 1, the outlet end of the first channel 11 is also arc-shaped and inclined (the outlet end of the second channel 41 is inclined in the same way as the outlet end of the first channel 11), which optimizes the outward expansion and improves the sound pickup quality.

[0060] Furthermore, the microphones 3 on the circuit board 2 are arranged in a circular array, and the central angles between any two adjacent microphones 3 are equal. In actual production, this pickup structure typically uses six uniformly distributed microphones 3 (silicon microphones) in a circular pattern. Each microphone 3 can individually cover a pickup range of ±30° with a radius of 5 meters. After channel adjustment based on the above structure, the entire device can achieve precise pickup with a radius of 6 meters and a radius of 360°. Since each microphone 3 can cover a range of ±30°, setting six microphones 3 on the circuit board 2 is usually sufficient for full-angle coverage. Increasing the number further does not significantly improve performance.

[0061] Of course, in other embodiments, multiple microphones 3 can also be arranged in other array configurations to meet different sound pickup requirements.

[0062] Furthermore, the housing 1 is made of plastic; the pickup element 4 is made of silicone. The plastic housing 1 houses the main first channel 11; its relatively hard material ensures a long service life. The internal pickup element 4 is typically made of silicone with a Shore hardness of around 45A. Using silicone can reduce the repeated sound pickup caused by multiple bounces within the channel. Excessively hard silicone can weaken performance; a hardness of 30A to 50A is recommended.

[0063] Furthermore, the microphone 3 is a silicon microphone 3. A silicon microphone 3 is a miniature microphone 3 manufactured based on semiconductor technology, which has the advantages of small size and high integration, while also having high shock resistance and durability, and more stable sound pickup performance in noisy environments.

[0064] Furthermore, a dustproof isolation cover 5 is also fitted onto the outer side of the housing 1. When the sound pickup structure of this solution is used in different environments, such as in a classroom, the accumulation of foreign matter such as chalk dust will significantly affect the sound pickup effect. Therefore, a high-density composite fabric can be used to make a dustproof isolation cover 5 on the outer layer of the housing 1 of the sound pickup structure. The dustproof isolation cover 5 can isolate a large amount of dust and other foreign matter, preventing them from entering the first channel 11 and the second channel 41, ensuring that the sound pickup structure still has a good sound pickup effect during long-term use.

[0065] Thus, the main sound pickup component in this solution includes a combination of three different materials: the outermost dustproof cover 5; the inner shell 1 with a first channel 11, which is the main channel; and the dustproof component with a second channel 41 is directly attached to the microphone 3, which has a better sound pickup effect.

[0066] Furthermore, the dustproof cover 5 is made of polyester fabric. Specifically, the dustproof cover 5 can be made of polyester fiber (polyester) reinforced material produced by high-density weaving, which has high strength and wear resistance, good weather resistance and chemical stability, and can maintain a long service life; due to the small gaps between polyester fibers, it can isolate particulate matter (such as dust) and has a good protective effect.

[0067] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A sound pickup structure, characterized in that, include: The housing (1) has an internal cavity and a through first sound channel (11) on the housing (1). Circuit board (2), which is disposed within the receiving cavity; Microphone (3), a plurality of microphones (3) are arranged in an array on the circuit board (2), and each microphone (3) is provided with a pickup element (4), and a through second channel (41) is opened in the pickup element (4), and the first channel (11) and the second channel (41) are interconnected.

2. The sound pickup structure according to claim 1, characterized in that, The second channel (41) is a cylinder with equal upper and lower diameters; the top of the housing (1) has a through first channel (11), which is located directly above the second channel (41).

3. The sound pickup structure according to claim 1, characterized in that, The second channel (41) includes a first sound transmission channel (411) and a second sound transmission channel (412) connected in sequence. The second sound transmission channel (412) is located above the microphone (3), and the first sound transmission channel (411) is located above the second sound transmission channel (412). Both the first sound transmission channel (411) and the second sound transmission channel (412) are cylindrical, and the diameter of the first sound transmission channel (411) is greater than the diameter of the second sound transmission channel (412). The top of the housing (1) is provided with the first sound channel (11), which is located directly above the first sound transmission channel (411) and the two are connected to each other. The diameter of the first sound channel (11) is equal to the diameter of the first sound transmission channel (411).

4. The sound pickup structure according to claim 1, characterized in that, The second channel (41) includes a first transmission channel (413) and a second transmission channel (414) connected in sequence. The second transmission channel (414) is located above the microphone (3), and the first transmission channel (413) is horizontally located on either side of the second transmission channel (414). The first sound channel (11) is provided on the side of the housing (1). The first sound channel (11) is connected to the outlet end of the first sound transmission channel (413), and the diameter of the first sound channel (11) is equal to the diameter of the first sound transmission channel (413).

5. The pickup structure according to claim 2, characterized in that, The top of the housing (1) is recessed downward to form a receiving groove (12) for accommodating the display device. From the edge of the top of the housing (1) to the receiving groove (12), the top of the housing (1) is an upwardly protruding arc shape, and the top of the arc-shaped housing (1) is provided with a through first sound channel (11), such that: from the side near the edge of the housing (1) to the side away from the edge of the housing (1), the outlet end of the first sound channel (11) is inclined upward. The tilt direction of the outlet end of the second channel (41) is the same as the tilt direction of the outlet end of the first channel (11).

6. The sound pickup structure according to claim 1, characterized in that, The microphones (3) on the circuit board (2) are arranged in a circular array, and the central angle between two adjacent microphones (3) is equal.

7. The pickup structure according to claim 1, characterized in that, The housing (1) is made of plastic; the pickup element (4) is made of silicone.

8. The sound pickup structure according to claim 1, characterized in that, The microphone (3) is a silicon microphone (3).

9. The sound pickup structure according to claim 1, characterized in that, The outer side of the housing (1) is also fitted with a dustproof isolation cover (5).

10. A pickup structure according to claim 9, characterized in that, The dustproof cover (5) is made of polyester fabric.

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