Wide-angle enhanced pickup device

Abstract

The utility model discloses a wide-angle enhanced 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; the side wall of the reflector is provided with a plurality of sound guide holes. According to the wide-angle enhanced pickup device provided by the utility model, the pickup effect is improved, and the pickup angle range is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, and particularly relates to a large-angle enhanced sound pickup 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 the head from time to time. This causes the distance between the speaker's mouth and the microphone to vary, resulting in the sound emitted by the loudspeaker becoming louder and softer. To solve this technical problem, the existing technologies all try to increase the gain as much as possible. However, only increasing the gain easily results in harsh whistling sounds. In addition, the existing microphones have a small sound pickup angle. Usually, the user needs to face the sound head of the microphone along the axis direction of the mouth to achieve a good sound pickup effect.

[0003] In view of the above technical problems, this application proposes a new technical solution that can enhance the sound pickup effect of the microphone within a large angle range. Summary of the Utility Model

[0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present utility model is to provide a large-angle enhanced sound pickup device, aiming to solve the technical problems of small sound pickup distance and small sound pickup angle range of the microphone in the prior art.

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

[0006] A large-angle enhanced sound pickup device includes a reflector and at least one sound head. A sound pickup cavity is formed inside the reflector. 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. A plurality of sound guiding holes are formed on the side wall of the reflector.

[0007] Further, in the large-angle enhanced sound pickup device, the sound pickup cavity is one of a cone, a frustum of a cone, a pyramid, and a frustum of a pyramid.

[0008] Further, in the large-angle enhanced sound pickup device, the specifications of all the sound guiding holes are the same, and the heights of all the sound guiding holes are the same.

[0009] Further, in the large-angle enhanced sound pickup device, all the sound guiding holes are equally spaced in the circumferential direction.

[0010] Further, in the large-angle enhanced sound pickup device, the bottom ends of all the sound guiding holes are higher than the top end of the sound head.

[0011] Further, in the large-angle enhanced sound pickup device, the sound head is located at the bottom of the sound pickup cavity.

[0012] Further, in the large-angle enhanced sound pickup 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.

[0013] Further, in the large-angle enhanced sound pickup device, no sound guiding hole is provided at the position where the side wall of the reflector faces any one of the sound guiding holes.

[0014] Beneficial effects: The present utility model provides a large-angle enhanced sound pickup device. Compared with the prior art, by providing a reflector, sound guiding holes are provided on the side wall of the reflector, a sound pickup cavity is provided inside the reflector, and the sound head is arranged in the sound pickup cavity, the sound pickup effect of the sound head can be greatly improved, and the technical problem that when a user speaks using a microphone and turns the head, the distance between the mouth and the microphone changes suddenly, further resulting in the sound emitted by the loudspeaker changing suddenly in volume is solved. Description of the Drawings

[0015] Figure 1 is a perspective view of the large-angle enhanced sound pickup device provided by the present utility model.

[0016] Figure 2 is a top view of the large-angle enhanced sound pickup device provided by the present utility model.

[0017] Figure 3 is Figure 2 the sectional view taken along P-P in

[0018] Figure 4 is a perspective view of the cover plate and the reflector.

[0019] Figure 5 is a schematic diagram of the sound wave reflection principle when the sound wave enters the sound pickup cavity from the top.

[0020] Figure 6 is a schematic diagram of the sound wave reflection principle when the sound wave enters the sound pickup cavity from the sound guiding hole. Detailed Embodiments

[0021] The present utility model provides a large-angle enhanced 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.

[0022] First, please refer to Figures 1 to 3 , the present utility model provides a large-angle enhanced 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 are inevitably used in this article (based on Figure 3Perspective), but these orientation terms are not intended to limit this application. The "several" described herein refers to an indefinite number greater than or equal to 1, because the number of the structures referred to is not the inventive point of this application itself.

[0023] The large-angle enhanced 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). 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. A plurality of sound guiding holes 102 are formed on the side wall of the reflector. 5 sound guiding holes are drawn in the drawings, but it is not limited to this in practical applications.

[0024] Preferably, the sound pickup cavity 100 is one of a cone, a frustum of a cone (i.e., the pointed corner of the cone is cut off), a pyramid, and a frustum of a pyramid (i.e., the pointed corner of the pyramid is cut off). The above-mentioned pyramid and frustum of a pyramid are preferably a regular pyramid and a regular frustum of a pyramid, that is, the cross-section is a regular polygon. This setting makes the sound pickup cavity have substantially the same sound pickup enhancement effect in the circumferential direction. The shape of the sound pickup cavity shown in the drawings is a frustum of a cone, but it is not limited to this.

[0025] Preferably, the specifications of each of the sound guiding holes 102 are the same, and the heights of each of the sound guiding holes are the same. Preferably, each of the sound guiding holes is equally spaced in the circumferential direction. This setting makes the sound pickup enhancement effect on the side surface of the reflector uniform in all directions in the circumferential direction.

[0026] Preferably, the bottom end of each of the sound guiding holes 102 is higher than the top end of the sound head. This setting enables the sound waves entering from each of the sound guiding holes to have the opportunity to be reflected to the front of the sound head.

[0027] The number of sound heads drawn in the drawings is 1, and this sound head is located on the axis of the sound pickup cavity. This is a preference. In practical applications, the number of sound heads can also be set to 2 or more.

[0028] 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.

[0029] As shown in the figure, preferably, the sound head is located at the bottom of the sound pickup cavity (as Figure 3 shown). 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.

[0030] Preferably, the distance between the top end of the sound head and the top end of the sound pickup cavity ( Figure 3The range in D) is 1 mm to 50 mm. This setting ensures that the sound pickup cavity has a certain depth, allowing sound waves to have the opportunity to reach the sound head after reflecting off the side walls of the sound pickup cavity, and also avoiding an overly large microphone volume due to an excessive depth of the sound pickup cavity.

[0031] Attached Figure 3 It can also be observed that a step 11 is provided at the top of the reflector, and this step is used to mount the cover plate 3. Figure 4 The cover plate 3 is drawn, and a number of through holes 30 are provided on the cover plate for sound waves to pass through the cover plate.

[0032] As a preference, no sound guiding hole is provided at the position of the side wall of the reflector opposite to any sound guiding hole (i.e., the opposite of the sound guiding hole is the solid part of the side wall of the reflector). The significance of this setting is that most of the sound waves incident from the sound guiding hole will be reflected by the solid side wall opposite, rather than exiting from another sound guiding hole. It should be noted that even if a sound guiding hole is provided opposite, it can also achieve the effect of enhanced sound pickup, because in actual use, sound waves may enter obliquely from the sound guiding hole and thus will not exit from the opposite sound guiding hole.

[0033] For ease of understanding, please refer to Figure 5 and Figure 6 ( Figure 5 and Figure 6 The cross-section lines are not drawn), and the structural principle is further explained below.

[0034] As shown in the figure, during actual use, a part of the sound waves emitted by the speaker enter through the opening at the top of the sound pickup cavity, and a part of the sound waves enter the sound pickup cavity through the sound guiding holes on the side wall of the reflector. Among the sound waves entering through the top of the sound pickup cavity, a part directly shoots towards the sound head (as shown by arrow A); and there is also a part that shoots towards the side wall of the sound pickup cavity (as shown by arrow B), and these sound waves reach the sound head after one (or more than one) reflection in the sound pickup cavity. The sound waves entering through the sound guiding holes (as shown by arrow C) either directly reach the sound head or reach the sound head after several reflections (as Figure 6 shown).

[0035] It can be observed from the attached drawings that if the reflector and the sound pickup cavity are not provided, the sound waves shown by arrows B and D will not reach the sound head; due to the provision of the reflector and the sound pickup cavity, the sound waves shown by arrows B and D have a greater chance of reaching the sound head, and thus, the sound pickup effect is improved.

[0036] In other words, sound waves entering the sound pickup cavity have a greater chance of reaching the microphone head, thus greatly enhancing the sound pickup effect. Therefore, even when the user turns their head while speaking, resulting in a slightly larger distance between the mouth and the microphone, there is still a good sound pickup effect. There is no need to simply increase the gain as in traditional technologies to solve the problem of the sound being sometimes loud and sometimes soft, and thus there will be no problem of howling due to excessive gain. In addition, since sound guiding holes are provided in the reflector, the speaker does not need to speak directly at the microphone head from the top. Even when speaking from the side, sound waves can enter the sound pickup through the sound guiding holes, and there is still a good sound pickup effect.

[0037] It should be noted that the attached Figure 5 arrow (direction of sound wave propagation) parallel to the axis of the sound pickup cavity is only a simplified expression. When the sound wave actually propagates, it is not limited to this. The attached Figure 6 shown sound wave reflection path is only one case of sound wave reflection, rather than the only propagation path.

[0038] 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. A large-angle enhanced sound pickup device, comprising a reflector and at least one microphone, 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. A plurality of sound guiding holes are formed in the side wall of the reflector.

2. The large-angle enhanced sound 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 large-angle enhanced sound pickup device according to claim 1, characterized in that: Each of the sound guiding holes has the same specification, and each of the sound guiding holes has the same height.

4. The large-angle enhanced sound pickup device according to claim 1, characterized in that: Each of the sound guiding holes is equally spaced in the circumferential direction.

5. The large-angle enhanced sound pickup device according to claim 1, characterized in that: The bottom end of each of the sound guiding holes is higher than the top end of the sound head.

6. The large-angle enhanced sound pickup device according to any one of claims 1-4, characterized in that: The sound head is located at the bottom of the sound pickup cavity.

7. The large-angle enhanced sound pickup device according to any one of claims 1-4, 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.

8. The large-angle enhanced sound pickup device according to claim 1, characterized in that: No sound guiding hole is provided at the position on the side wall of the reflector opposite to any one of the sound guiding holes.

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