Enhanced microphone pickup device

Abstract

The utility model discloses an enhanced microphone pickup device, which comprises a reflector and at least one sound head, a pickup cavity is arranged in the reflector, the upper part of the pickup cavity is wide, the lower part of the pickup cavity is narrow, the sound head is arranged in the pickup cavity, and the top end of the sound head is lower than the top end of the pickup cavity. According to the enhanced microphone pickup device provided by the utility model, the pickup effect of the microphone can be enhanced, the situation that the sound emitted by the loudspeaker is unstable when a speaker rotates the head is avoided, and the problem of howling caused by excessively increasing the gain is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, and particularly relates to a microphone sound pickup enhancing device. Background Art

[0002] The microphones used in loudspeakers on the market have a short sound pickup distance. Usually, the mouth needs to be very close to the microphone to achieve a good sound amplification effect. However, in some situations (such as giving lectures with a loudspeaker), the speaker inevitably needs to turn his head from time to time, which causes the distance between the speaker's mouth and the microphone to be sometimes far and sometimes near, resulting in the sound emitted by the loudspeaker becoming sometimes loud and sometimes soft. To solve this technical problem, the prior art tries to increase the gain as much as possible. However, only increasing the gain easily results in harsh whistling sounds. In view of the above technical problems, this application proposes a new technical solution that can enhance the sound pickup effect of the microphone and avoid the sound emitted by the loudspeaker from becoming sometimes loud and sometimes soft when the speaker turns his head. Content of the Utility Model

[0003] In view of the deficiencies of the above prior art, the purpose of the utility model is to provide a microphone sound pickup enhancing device, aiming to solve the technical problem of short sound pickup distance of the microphone in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A microphone sound pickup enhancing device includes a reflector and at least one sound head. A sound pickup cavity is formed in the reflector. The sound pickup cavity is wider at the top and narrower at the bottom. The sound head is located in the sound pickup cavity, and the top end of the sound head is lower than the top end of the sound pickup cavity.

[0006] Further, in the microphone sound pickup enhancing device, the sound pickup cavity is one of a cone, a frustum of a cone, a pyramid, and a frustum of a pyramid.

[0007] Further, in the microphone sound pickup enhancing device, the sound pickup cavity is a stepped hole.

[0008] Further, in the microphone sound pickup enhancing device, the number of sound heads is 1, and this sound head is located on the axis of the sound pickup cavity.

[0009] Further, in the microphone sound pickup enhancing device, the number of sound heads is 2 or more.

[0010] Further, in the microphone sound pickup enhancing device, the sound head is located at the bottom of the sound pickup cavity.

[0011] Further, in the microphone sound pickup enhancing device, the distance range between the top end of the sound head and the top end of the sound pickup cavity is 1 mm to 50 mm.

[0012] Beneficial effects: The present utility model provides an enhanced microphone sound pickup device. Compared with the prior art, by providing a reflector with a sound pickup cavity disposed therein and arranging the sound head within the sound pickup cavity, the sound pickup effect of the sound head can be significantly improved and the sound pickup distance can be increased, solving the technical problem that when a user speaks into the microphone and even turns the head, the distance between the mouth and the microphone varies, further causing the sound emitted by the loudspeaker to vary in volume. Description of the Drawings

[0013] Figure 1 FIG. is a perspective view of the enhanced microphone sound pickup device provided by the present utility model.

[0014] Figure 2 FIG. is a top view of the enhanced microphone sound pickup device provided by the present utility model.

[0015] Figure 3 is Figure 2 the sectional view taken along line P-P in

[0016] Figure 4 FIG. is a perspective view of the cover plate and the reflector.

[0017] Figure 5 FIG. is a schematic diagram of the sound wave reflection principle of the sound pickup cavity.

[0018] Figure 6 FIG. is a schematic structural diagram of the sound pickup cavity of another embodiment. Detailed Embodiment

[0019] The present utility model provides an enhanced microphone sound pickup device. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] First, please refer to Figures 1 to 3 , the present utility model provides an enhanced microphone sound pickup device. The drawings are only used to explain the structural principle and are not in proportion to the actual product. The drawings only show the structures related to the inventive points of the present application, and some conventional structures are not specifically shown. For the convenience of description, some orientation words (based on Figure 3 the perspective) are inevitably used in this article, but these orientation words are not intended to limit the present application.

[0021] The enhanced microphone sound pickup device includes a reflector 1 and at least one sound head 2. A sound pickup cavity 100 is formed inside the reflector. The sound pickup cavity is wider at the top and narrower at the bottom (i.e., tapering from top to bottom), and the sound head 2 is located within the sound pickup cavity, with the top of the sound head lower than the top of the sound pickup cavity.

[0022] In this application, since the structure of the sound pickup cavity is larger at the top and smaller at the bottom, therefore, the sound waves hitting the side wall of the sound pickup cavity have the opportunity to be reflected onto the sound head. Preferably, the sound pickup cavity is one of a cone, a frustum of a cone (i.e., the tip of the cone is cut off), a pyramid, and a frustum of a pyramid (i.e., the tip of the pyramid is cut off). This setting enables the sound pickup cavity to have a substantially the same sound pickup enhancement effect in the circumferential direction. The above-mentioned pyramid and frustum of a pyramid are preferably a regular pyramid and a regular frustum of a pyramid, i.e., the cross-section is a regular polygon. The shape of the sound pickup cavity shown in the attached drawings is a frustum of a cone, but it is not limited thereto.

[0023] In addition, in another embodiment, the sound pickup cavity can also be set to the structure as shown in Figure 6 That is, a stepped hole with 2 levels or more (here it is not limited to through holes or blind holes). Figure 6 Shown is a 3-level stepped hole (not limited to 3-level stepped holes in practical applications), including inner cavities (101, 102, and 103) that communicate with each other. After the light hits the side wall of the stepped hole, it has the opportunity to be reflected onto the sound head.

[0024] As shown in the attached drawings, as a preference, the number of sound heads is 1, and this sound head is located on the axis of the sound pickup cavity.

[0025] In practical applications, the number of sound heads can also be set to 2 or more. When there are 2 sound heads, it is preferably symmetrically arranged with the symmetry line coinciding with the axis of the sound pickup cavity. When there are 3 or more sound heads, the sound heads are equally spaced in the circumferential direction; that is, the sound heads are arranged in a ring, and the axis of the ring where the sound heads are located coincides with the axis of the sound pickup cavity. This setting enables the multi-sound heads to be evenly distributed in the circumferential direction, and speakers can achieve a better sound pickup enhancement effect when speaking into the microphone in any direction.

[0026] As shown in Figure 3 Preferably, the sound head is located at the bottom of the sound pickup cavity. Since the sound head is located at the bottom of the sound pickup cavity, this setting enables the sound waves entering the sound pickup cavity to have a greater chance of reaching the sound head, thereby obtaining a better sound pickup enhancement effect.

[0027] Preferably, the distance ( Figure 3 D in) between the top of the sound head and the top of the sound pickup cavity ranges from 1 mm to 50 mm. This setting ensures that the sound pickup cavity has a certain depth, ensuring that the sound waves have the opportunity to reach the sound head after being reflected on the side wall of the sound pickup cavity, and also avoiding the microphone being too large due to the excessive depth of the sound pickup cavity.

[0028] It can also be observed from the attached Figure 3 that there is a step 11 provided at the top of the reflector, and this step is used to install the cover plate 3. Figure 4 The cover plate 3 is drawn, and there are several through holes 30 provided on the cover plate for the sound waves to pass through the cover plate.

[0029] For easy understanding, please refer toFigure 5 , the structural principle will be further explained below.

[0030] As shown in the figure, in actual use, a part of the sound wave emitted by the speaker directly shoots towards the microphone head (as shown by arrow A), and another part shoots towards the side wall of the pickup cavity (as shown by arrow B). If there is no reflector and pickup cavity, the sound wave shown by arrow B will not reach the microphone head; due to the setting of the reflector and pickup cavity, these sound waves reach the microphone head after one (or more than one) reflection in the pickup cavity. In other words, the sound waves entering the pickup cavity have a greater chance of reaching the microphone head, thus greatly enhancing the pickup effect. Therefore, even when the user turns his head during speaking, resulting in a slightly larger distance between the mouth and the microphone, there is still a good pickup effect, and there is no need to solve the problem of the sound being sometimes loud and sometimes soft by simply increasing the gain in the traditional technology, and thus there will be no problem of howling due to excessive gain.

[0031] It should be noted that Figure 5 the drawn arrow (sound wave propagation direction) being parallel to the axis of the pickup cavity is only a schematic expression, and it is not limited to this in actual use.

[0032] It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solution and the inventive concept of the present utility model, and all such changes or replacements should fall within the protection scope of the present utility model.

Claims

1. An enhanced microphone sound pickup device, comprising a reflector and at least one sound head, wherein a sound pickup cavity is formed inside the reflector, and is characterized in that: The sound pickup cavity is wider at the top and narrower at the bottom. The sound head is located inside the sound pickup cavity, and the top end of the sound head is lower than the top end of the sound pickup cavity.

2. The enhanced microphone pickup device according to claim 1, wherein: The sound pickup cavity is one of a cone, a frustum of a cone, a pyramid, and a frustum of a pyramid.

3. The enhanced microphone pickup device according to claim 1, wherein: The sound pickup cavity is a stepped hole.

4. The enhanced microphone pickup device according to claim 2, characterized in that: The number of sound heads is 1, and this sound head is located on the axis of the sound pickup cavity.

5. The enhanced microphone pickup device according to claim 2, wherein: The number of sound heads is 2 or more.

6. The enhanced microphone pickup device according to any one of claims 1-5, characterized in that: The sound head is located at the bottom of the sound pickup cavity.

7. The enhanced microphone pickup device according to any one of claims 1-5, characterized in that: The distance range between the top end of the sound head and the top end of the sound pickup cavity is 1 mm to 50 mm.

Images