Acoustic lens waveguide structure suitable for microphone and microphone

Abstract

The utility model relates to the technical field of microphones, in particular to an acoustic lens waveguide structure suitable for a microphone and the microphone, which comprises a funnel-shaped die cavity, a plurality of nested funnel-shaped die cores are arranged in the die cavity, and sound wave channels are arranged between the die cavity and the die cores and between any one die core and the adjacent die core. And the sound wave channels are communicated with one another. According to the utility model, the acoustic lens formed by the funnel-shaped mold cavity and the plurality of nested funnel-shaped mold cores is utilized, so that the advancing path and the convergence degree of sound waves can be accurately controlled, the sound waves can be effectively concentrated to a specific area, clear focusing of an audio effect is realized, sound wave reflection and echo can be obviously reduced, and the sound quality is improved. Therefore, the sound receiving quality is improved; and meanwhile, the phenomenon of high-frequency phase offset can be avoided, so that the received high-frequency response is straighter.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, and in particular to an acoustic lens waveguide structure suitable for microphones and the microphone. Background Art

[0002] In the design of existing ear-hook microphones, due to their insufficient directional sound pickup ability, the sound will be reflected multiple times on the way to the microphone, which will cause the reflected sound and the direct sound to cancel each other out when the phase difference at a specific frequency is close to half a cycle.

[0003] An acoustic lens is a device that uses the propagation characteristics of sound waves to focus or change the direction of sound waves; its working principle is similar to that of an optical lens, both of which use a specific shape design to accurately control the path of sound waves and their degree of convergence. This not only effectively concentrates sound waves to a specific area, achieving clear focus of audio effects, but also significantly reduces sound wave reflections and echoes, making it less likely to produce high-frequency cancellation during sound transmission, making the received high-frequency frequency response flatter, thereby improving sound quality and ensuring it is purer and clearer.

[0004] Based on this, it is necessary to improve the structure of the microphone pickup to prevent the occurrence of high-frequency phase cancellation, so that the received high-frequency frequency response is flatter, thereby improving the sound pickup quality of the ear-hook microphone. Utility Model Content

[0005] The purpose of the utility model is to provide an acoustic lens waveguide structure and a microphone suitable for a microphone, which can accurately control the travel path of sound waves and the degree of convergence of sound waves, so that not only can the sound waves be effectively concentrated to a specific area to achieve clear focus of the audio effect, but also the sound wave reflection and echo can be significantly reduced, thereby improving the sound reception quality; at the same time, it can avoid the high-frequency phase cancellation phenomenon, making the received high-frequency frequency response flatter, thereby improving the sound reception quality of the ear-hook microphone.

[0006] The embodiment of the utility model is realized through the following technical scheme: an acoustic lens waveguide structure suitable for a microphone, comprising a funnel-shaped mold cavity, a plurality of nested funnel-shaped mold cores are arranged in the mold cavity, sound wave channels are arranged between the mold cavity and the mold cores and between any mold core and the adjacent mold cores, and each of the sound wave channels is connected.

[0007] According to a preferred embodiment, a plurality of the mold cores are coaxially nested.

[0008] According to a preferred embodiment, a plurality of the mold cores are spaced apart along the axial direction of the mold cavity.

[0009] According to a preferred embodiment, each of the acoustic wave channels is provided with a support column, a first end of the support column is connected to the outer surface of the corresponding mold core, and a second end of the support column is connected to the inner surface of the corresponding mold core or mold cavity.

[0010] The utility model also provides a microphone, comprising the acoustic lens waveguide structure as described above.

[0011] According to a preferred embodiment, the mold cavity is held adjacent to the sound pickup direction of the microphone.

[0012] According to a preferred embodiment, the mold cavity is arranged on the outer shell of the microphone, with its large end facing outwards and its small end extending to the sound receiving port of the microphone.

[0013] The acoustic lens waveguide structure and the technical solution of the microphone provided by the embodiment of the utility model have at least the following advantages and beneficial effects: (1) By utilizing an acoustic lens composed of a funnel-shaped cavity and a plurality of nested funnel-shaped cores, it is possible to accurately control the path of sound waves and their degree of convergence, thereby not only effectively concentrating the sound waves to a specific area and achieving clear focus of the audio effect, but also significantly reducing sound wave reflection and echo, thereby improving the sound reception quality; (2) At the same time, high-frequency phase cancellation is avoided, making the received high-frequency frequency response flatter; (3) By optimizing and adjusting the structure, effective focusing of wide-band sound waves can be achieved, further optimizing the performance of the microphone in various sound environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the acoustic lens waveguide structure provided in Example 1 of the utility model;

[0015] Figure 2 A schematic diagram of the sound wave transmission path provided in Example 1 of the utility model;

[0016] Figure 3 A cross-sectional view of an acoustic lens waveguide structure provided in Example 2 of the utility model;

[0017] Figure 4 A top view of the acoustic lens waveguide structure provided in Example 2 of the utility model;

[0018] Figure 5 This is a schematic diagram of the assembly of the acoustic lens waveguide structure provided in Example 3 of the utility model;

[0019] Figure 6 A schematic longitudinal section diagram of a microphone provided in Embodiment 3 of the present utility model;

[0020] Figure 7 A schematic cross-sectional view of a microphone provided in Embodiment 3 of the present utility model;

[0021] Icon: 1- mold cavity, 2- mold core, 3- sound wave channel, 4- support column, 5- outer shell, 6- sponge pad, 7- microphone PCB board, 8- microphone. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Example 1

[0024] An acoustic lens waveguide structure suitable for a microphone, such as Figure 1 As shown, it includes a funnel-shaped mold cavity 1 and a plurality of funnel-shaped mold cores 2, which together constitute an acoustic lens waveguide structure.

[0025] Among them, several funnel-shaped cores 2 are nested in the funnel-shaped cavity 1, and the number of cores 2 can be selected to be 2, 4, etc., and there is no specific restriction on the number of funnel-shaped cores 2; in addition, the cross-section of the core 2 and the cavity 1 can be selected to be elliptical or square, etc., and there is no specific restriction on the structure of the core 2 and the cavity 1.

[0026] See also Figure 2 As shown, a sonic channel 3 is provided between the mold cavity 1 and the mold core 2 and between any mold core 2 and an adjacent mold core 2 .

[0027] from Figure 2 It can be seen that each mold core 2 and mold cavity 1 forms a sound wave channel 3 in the main path. In addition, two sound wave channels 3 are formed in the bypass through two mold cores 2. Sound waves are transmitted from multiple directions. Under the guidance of the above-mentioned sound wave channels 3, the travel path of the sound waves and the degree of convergence are precisely controlled. The sound waves propagate along the set path, and the sound wave channels 3 are interconnected and concentrated in a specific area. In this way, clear focusing of the audio effect can be achieved, and sound wave reflection and echo can be significantly reduced, thereby improving the sound collection quality.

[0028] At the same time, since the above structure can guide sound waves to propagate along a set path, it significantly reduces sound wave reflection and echo, avoids high-frequency phase cancellation, and makes the high-frequency frequency response finally received by the microphone flatter, thereby maintaining the clarity of calls in noisy environments and further optimizing the performance of the microphone in various sound environments.

[0029] Example 2

[0030] This embodiment is based on the technical solution of Embodiment 1 and further illustrates the connection relationship between the mold core 2 and the mold cavity 1.

[0031] As a preferred solution, see Figure 4 As shown, a plurality of mold cores 2 are coaxially nested and spaced apart along the axial direction of the mold cavity 1 .

[0032] To achieve the connection and fixation of each layer of the core 2, see Figure 3 As shown, in this embodiment, a support column 4 is provided in each of the acoustic wave channels 3 , wherein the first end of the support column 4 is connected to the outer surface of the corresponding mold core 2 , and the second end of the support column 4 is connected to the inner surface of the corresponding mold core 2 or mold cavity 1 .

[0033] In a preferred implementation of the present embodiment, support columns 4 are provided in the four positive directions of each layer of the sound wave channel 3, and the support columns 4 in four directions can realize a stable connection between adjacent cores 2 and the core 2 and the cavity 1. No specific parameters such as the length and width of the support columns 4 are made here, and corresponding modifications can be made according to the specific acoustic focusing effect.

[0034] In addition, the large end of the mold core 2 is arranged flush with the large end of the mold cavity 1, and a rounded corner is processed at the large end of the mold core 2. In addition, the height of the large end of each layer of the mold core 2 can also decrease from the outside to the inside or increase from the outside to the inside. The large end of the mold core 2 can also be processed into other shapes, and no specific restrictions are made here.

[0035] It should be noted that, based on the acoustic lens waveguide structure, taking into account the frequency characteristics of sound waves, sound waves of different frequencies will behave differently during propagation and focusing. The size and shape of each layer of the core 2 or the outermost cavity 1 are optimized to achieve effective focusing of wide-band sound waves and improve the sound collection performance of the microphone in various sound environments, which will fall within the protection scope of the present utility model.

[0036] Example 3

[0037] This embodiment is based on the technical solutions of Embodiment 1 and Embodiment 2, and provides a microphone including the acoustic lens structure as described in Embodiment 1 and Embodiment 2.

[0038] As a preferred solution, see Figure 5 and Figure 7 As shown, the mold cavity 1 is maintained adjacent to the sound pickup direction of the microphone 8, the microphone 8 is installed at the lower end of the acoustic lens, a sponge pad 6 is provided between the lower end of the acoustic lens and the microphone PCB board 7, wherein the microphone PCB board 7 is located at the upper end of the microphone 8.

[0039] In a preferred implementation of this embodiment, see Figure 6As shown, the mold cavity 1 is arranged on the outer shell 5 of the microphone 8, with its large end facing outward and the small end extending to the sound receiving port of the microphone 8; thereby, the sound waves from the target sound source can be effectively concentrated on the sound receiving port of the microphone 8, thereby achieving clear focus of the audio effect, and can also significantly reduce sound wave reflection and echo, thereby improving the sound receiving quality.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acoustic lens waveguide structure suitable for a microphone, characterized in that: The invention comprises a funnel-shaped mold cavity (1), wherein a plurality of nested funnel-shaped mold cores (2) are arranged in the mold cavity (1), and sound wave channels (3) are arranged between the mold cavity (1) and the mold cores (2) and between any mold core (2) and an adjacent mold core (2), and the sound wave channels (3) are interconnected.

2. The acoustic lens waveguide structure suitable for a microphone as claimed in claim 1, characterized in that: A plurality of the mold cores (2) are coaxially nested.

3. The acoustic lens waveguide structure suitable for a microphone as claimed in claim 1, characterized in that: A plurality of mold cores (2) are arranged at intervals along the axial direction of the mold cavity (1).

4. The acoustic lens waveguide structure suitable for a microphone according to claim 1, characterized in that: A support column (4) is provided in each of the acoustic wave channels (3), wherein a first end of the support column (4) is connected to the outer surface of the corresponding mold core (2), and a second end of the support column (4) is connected to the inner surface of the corresponding mold core (2) or mold cavity (1).

5. A microphone, characterized in that: Comprising the acoustic lens waveguide structure as described in any one of claims 1 to 4.

6. The microphone according to claim 5, characterized in that The mold cavity (1) is held adjacent to the sound pickup direction of the microphone (8).

7. The microphone according to claim 5, characterized in that The mold cavity (1) is arranged on the outer shell (5) of the microphone (8), with its large end facing outwards and its small end extending to the sound receiving port of the microphone (8).

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