CN220733017U - Microphone rainproof device and acoustic measurement equipment - Google Patents

Abstract

The utility model discloses a microphone rainproof device and acoustic measurement equipment, and relates to the technical field of acoustic measurement. The microphone rainproof device comprises a windshield and a rainproof component, wherein the windshield comprises a first inner cavity, and the windshield is made of porous materials; the rain-proof subassembly includes rain-proof cover, waterproof ventilated membrane and first sealing washer, and the head of microphone wears to establish in the rain-proof cover, and the tip that the rain-proof cover is located the windshield is equipped with the opening, and waterproof ventilated membrane seals the opening, and first sealing washer encircles in the surface of microphone to with rain-proof cover and microphone elasticity butt. The microphone rainproof device has a simple structure and is convenient to install; on the other hand, a space which is difficult to invade by liquid is formed in the area between the waterproof breathable film and the sealing ring, so that the waterproof breathable film has a rainproof effect.

Description

Microphone rainproof device and acoustic measurement equipment

Technical Field

The utility model relates to the technical field of acoustic measurement, in particular to a microphone rainproof device and acoustic measurement equipment.

Background

In the case of acoustic measurements outdoors, the effects of rain and wind are not negligible. If rain or other liquid is present on the diaphragm of the microphone, the sensitivity and frequency response performance of the microphone are affected. And wind may create offset noise or cause turbulent noise if it acts directly on the microphone. These can adversely affect the results of the test, and in severe cases even prevent the test from proceeding properly.

The Chinese patent with publication number of CN218103415U discloses an outdoor microphone, which is provided with a wind-proof and water-proof component such as a sponge wind-proof cover, a rain-proof cap, a water-proof film sleeve and the like outside the microphone component, thereby reducing the influence of wind and rain water on measurement data of the outdoor microphone during measurement. However, the outdoor microphone has a complicated structure and is inconvenient to install.

Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.

Disclosure of Invention

The utility model aims to provide a microphone rainproof device and acoustic measurement equipment, which are simpler in structure and can be conveniently assembled.

To achieve the above object, the present utility model provides a microphone rainproof device, comprising: a windshield and a rain shield assembly.

A windshield comprising a first interior cavity, the windshield being made of a porous material;

the rainproof assembly comprises a rainproof cover, a waterproof breathable film and a first sealing ring, wherein the head of the microphone is arranged in the rainproof cover in a penetrating mode, an opening is formed in the end portion of the rainproof cover, which is positioned in the windproof cover, the waterproof breathable film seals the opening, and the first sealing ring surrounds the outer surface of the microphone and is elastically abutted to the rainproof cover and the microphone.

Further, the rain-proof cover includes the first terminal surface and the second terminal surface that are located both ends respectively and intercommunication first terminal surface with the mounting hole of second terminal surface, first terminal surface is located inside the wind-proof cover, waterproof ventilated membrane is located first terminal surface.

Further, the rain shield comprises a convex hook part, and the hook part is hooked with the wind shield.

Further, the hook part is annular.

Further, the windshield is made of sponge, and the windshield is spherical.

Further, the rain-proof cover is provided with an annular cavity for placing the first sealing ring and a threaded hole for communicating the annular cavity with a second end face of the rain-proof cover, the second end face is the end face of the rain-proof cover facing the outside of the wind-proof cover, the microphone rain-proof device further comprises a butt piece screwed with the threaded hole, the butt piece is used for extruding the first sealing ring, and the butt piece is provided with a through hole for the microphone to penetrate.

Further, the thickness of the annular cavity is smaller than that of the first sealing ring in a natural state, and the width of the annular supporting surface of the annular cavity is smaller than or equal to that of the first sealing ring in a natural state.

Further, the abutment comprises a convex ring protruding outwards, and the microphone rainproof device comprises a second sealing ring extruded between the convex ring and the rainproof cover.

Further, the through hole surface is provided with an annular seal member elastically abutting against the microphone.

In another aspect, the utility model provides an acoustic measurement device comprising a microphone and a microphone flashing arrangement as defined in any one of the preceding claims, the microphone being mounted in the flashing cover.

Compared with the prior art, the utility model has the following beneficial effects: the microphone rainproof device comprises a windshield and a rainproof assembly, wherein the rainproof assembly comprises a rainproof cover, a waterproof breathable film and a first sealing ring, the head of the microphone is arranged in the rainproof cover in a penetrating mode, an opening is formed in the end portion, located in the windshield, of the rainproof cover, the waterproof breathable film seals the opening, and the first sealing ring surrounds the outer surface of the microphone and is elastically abutted to the rainproof cover and the microphone. The microphone rainproof device has a simple structure and is convenient to install; in addition, the wind shield can prevent wind from directly acting on the microphone, is favorable for preventing offset noise or turbulent noise, forms a space which is difficult to invade by liquid in the area between the waterproof breathable film and the sealing ring, plays a role in preventing rain, and is favorable for ensuring the reliable use of the microphone in an outdoor environment.

Drawings

Fig. 1 is an exploded view of a microphone rain guard according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a windshield of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 3 is a schematic view of a rain shield of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 4 is a cross-sectional view of a rain shield of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 5 is a cross-sectional view of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 6 is a cross-sectional view of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 7 is a partial enlarged view of i in fig. 6.

Fig. 8 is an enlarged view of a portion at ii in fig. 6.

Fig. 9 is a cross-sectional view of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 10 is an enlarged view of a portion at iii in fig. 9.

Fig. 11 is a cross-sectional view of a microphone rain guard in accordance with one embodiment of the utility model.

Fig. 12 is an enlarged view of a portion at iv in fig. 11.

Fig. 13 is a graph of the frequency response measured by an acoustic measurement device according to an embodiment of the present utility model.

Fig. 14 is a table of technical parameters measured by the acoustic measurement apparatus according to an embodiment of the present utility model.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

As shown in fig. 1 and 2, a microphone rain-proof device corresponding to a preferred embodiment of the present utility model includes a windshield 1 and a rain-proof assembly 2.

The windshield 1 comprises a first inner cavity 10, the windshield 1 is made of a porous material, sound waves can be transmitted into the device through the pores of the windshield 1, and wind is blocked by the windshield 1, so that the influence of the wind on pickup of the microphone 6 is reduced; it is advantageous to prevent the wind from directly acting on the microphone 6 to cause offset noise or turbulence noise.

As shown in fig. 3 to 6, the rain-proof assembly 2 includes a rain-proof cover 20, a waterproof and breathable film 21 and a first sealing ring 22, a head 61 of the microphone 6 is penetrated in the rain-proof cover 20, an opening 200 is arranged at the end of the rain-proof cover 20 in the wind-proof cover 1, and sound waves are transmitted into the microphone 6 through the opening 200; the waterproof and breathable film 21 seals the opening 200, and the waterproof and breathable film 21 has waterproof and sound-permeable effects; the first sealing ring 22 surrounds the outer surface 60 of the microphone 6, and the first sealing ring 22 is made of an elastic material, for example, an elastic material such as rubber, and is elastically abutted against the rain cover 20 and the microphone 6, so as to play a role in water resistance.

The rain shield 20 is arranged in the first inner cavity 10 of the wind shield 1, the waterproof and breathable film 21 seals the opening 200 of the rain shield 20, liquid can be prevented from invading to the area where the head 61 of the microphone 6 is located from the opening 200 of the rain shield 20, the first sealing ring 22 seals the gap between the microphone 6 and the wind shield 1, liquid can be prevented from invading to the area where the head 61 of the microphone 6 is located through the gap between the microphone 6 and the rain shield 20, that is to say, a space where liquid is difficult to invade is formed in the area between the waterproof and breathable film 21 and the first sealing ring 22, the head 61 of the microphone 6 is arranged in the space, drying of the working environment where the microphone 6 is located is guaranteed, and the microphone can work normally and reliably in outdoor rainwater environment. On the other hand, the microphone rainproof device is simple in structure and convenient to install.

As shown in fig. 3 and 4, the weather shield 20 includes first and second end surfaces 201 and 202 at both ends, respectively, and a mounting hole 203 communicating the first and second end surfaces 201 and 202, the first end surface 201 being located inside the weather shield 1, the second end surface 202 being directed to the outside of the weather shield 20. As a preferred embodiment, the rain shield 20 and the microphone 6 are both solid of revolution, and the first end surface 201 contacts the inner cavity surface of the windshield 1, so that the connection of the rain shield 20 and the windshield 1 is more stable. Because the head 61 of the microphone 6 is the pick-up membrane, at least the head 61 of the microphone 6 is arranged in the mounting hole 203 of the rain cover 20, and the waterproof and breathable film 21 is arranged in front of the microphone 6 and fixedly connected with the rain cover 20 for preventing rainwater from contacting the pick-up membrane of the microphone 6 and ensuring the dryness of the working environment of the pick-up membrane.

The waterproof and breathable membrane 21 is preferably located at the open end of the rain cover 20 where the opening 200 is located, as shown in fig. 5, and in some embodiments, the waterproof and breathable membrane 21 is disposed within the mounting hole 203 of the rain cover 20, adjacent to the first end face 201, and disposed in parallel with the head 61 of the microphone 6. In other embodiments, the waterproof and breathable membrane 21 is provided at the first end surface 201, which can prevent liquid from accumulating at the opening 200, and the structure is more compact. As shown in fig. 6 and 7, as a preferred embodiment, the opening 200 of the rain cover 20 is provided with an annular boss 205 protruding inward from the side wall 206, and the head 61 of the microphone 6 abuts against the boss 205 of the rain cover 20, so that the effect of limiting is achieved, and the convenience of installation of the microphone 6 and the stability after the completion of the installation are improved.

The rain shield 20 includes a first portion 20a, a second portion 20b, and a third portion 20c (as shown in fig. 4, which are generally defined by three portions shown by dot-dash lines), which are sequentially disposed, wherein a first end 201 of the rain shield 20 is located in the first portion 20a, a second end 202 of the rain shield 20 is located in the third portion 20c, and as a preferred embodiment, the rain shield 20 is a solid of revolution, the first portion 20a and the third portion 20c are cylindrical, the second portion 20b is in a truncated cone shape, axes of the three portions are coincident, a diameter of the first portion 20a is smaller than a diameter of the third portion 20c, and a diameter of a connecting surface 207 of the second portion 20b connected to the third portion 20c is larger than a diameter of the second portion 20b, thereby forming an annular hook 300; the hook 300 is hooked with the windshield 1, and functions to fix the windshield 1 and the weather shield 20, preventing the weather shield 20 from being withdrawn from the windshield 1. It is understood that the hook 300 may not be annular, for example, one or more convex hooks 300 may be provided.

Further, the inner cavity 10 of the weather shield 1 has the same contour as the outer contour of the weather shield 20, preferably both are tight-fitting, and the weather shield 20 has been secured by the clamping force of the material. Except that the tail end of the second end face 202 of the rain shield 20 is located outside the inner cavity 10 of the wind shield 1, the rest parts of the rain shield 20 are all arranged in the inner cavity 10 of the wind shield 1, and the rain shield 20 and the wind shield 1 can be fixed in a gluing mode and the like, so that the connection firmness of the wind shield 1 and the rain shield 20 is improved.

The wind shield 1 is made of porous materials, has good sound absorption and wind prevention effects, and can be made of porous materials such as sponge or foam; as shown in fig. 6, in a preferred embodiment, the windshield 1 is spherical, and the head 61 of the microphone 6 is located at or near the center of the windshield 1, and the sound pickup diaphragm of the microphone 6 is located at approximately the same distance from the outer surface of the windshield 1, thereby improving the sound pickup effect of the microphone 6.

As shown in fig. 1 and 4, the third portion 20c of the weather shield 20 is provided with an annular chamber 220 for placing the first seal ring 22 and a screw hole 221 communicating the annular chamber 220 with the second end face 202 of the weather shield 20, the diameter of the annular chamber 220 being smaller than the diameter of the screw hole 221, thereby forming a step 204 inside the third portion 20 c. The microphone rainproof device further comprises an abutting piece 3 in threaded connection with the threaded hole 221, and the abutting piece 3 is provided with a through hole 31 for the microphone 6 to penetrate through; preferably, the through hole 31 coincides with the axis of the mounting hole 203 of the rain cover 20, the microphone 6 passes through the through hole 31 and is disposed in the mounting hole 203 with the first sealing ring 22, when the abutting piece 3 is rotated, the depth of the abutting piece 3 extending into the rain cover 20 becomes larger, the distance between the third end face 32 of the abutting piece 3 and the annular supporting surface 2200 of the annular cavity 220 becomes smaller, the first sealing ring 22 deforms under the extrusion of the abutting piece 3 and the annular supporting surface 2200, the radial thickness thereof becomes larger, and the matching with the annular side wall 2201 of the annular cavity 2201 and the outer surface 60 of the microphone 6 is tighter, thereby better playing the roles of waterproof and fixing the microphone 6.

Specifically, as shown in fig. 8, the thickness B of the annular cavity 220 is smaller than the thickness D of the first seal ring 22 in the natural state, and the width a of the annular supporting surface 2200 of the annular cavity 220 is smaller than or equal to the width C of the first seal ring 22 in the natural state. Thus, when the abutting piece 3 is screwed, the third end face 32 of the abutting piece 3 facing the inside of the windshield 1 is contacted with the first sealing ring 22, at this time, the first sealing ring 22 is simultaneously contacted with the annular supporting surface 2200 of the annular cavity 220, the annular side wall 2201 of the annular cavity 220 and the outer surface 60 of the microphone 6, and as the abutting piece 3 is screwed, the first sealing ring 22 deforms under the extrusion of the third end face 32 of the abutting piece 3, so that the width C of the first sealing ring 22 is increased, the first sealing ring 22 extrudes the outer surface and the annular side wall 2201 of the microphone 6, the microphone 6 is fixed, and meanwhile, the microphone 6 is better sealed and waterproof.

As shown in fig. 9 and 10, in one embodiment, the abutment member 3 comprises a convex collar 30 protruding outwards, and the microphone flashing device further comprises a second sealing ring 4 pressed between the collar 30 and the flashing 20, the second sealing ring 4 being made of an elastic material, such as rubber. When the abutting piece 3 is screwed, the second sealing ring 4 abuts against the second end face 202 of the rain cover 20 and the fourth end face 33 of the convex ring 30, deformation occurs, so that liquid is difficult to invade the threaded hole 221, and the waterproof performance is further improved.

As shown in fig. 11 and 12, the surface of the through hole 31 of the abutment 3 is provided with an annular seal 5 elastically abutting against the outer surface 60 of the microphone 6. As a preferred embodiment, the annular seal 5 comprises a flare 50, the diameter of the flare 50 increasing towards the inside of the windshield 1 in order to fit the annular seal 5 over the microphone 6. The annular sealing piece 5 is elastically abutted with the outer surface 60 of the microphone 6, the annular sealing piece 5 deforms after being extruded, a gap between the through hole 31 of the abutting piece 3 and the outer surface 60 of the microphone 6 is filled, rainwater is prevented from entering the threaded hole 221 through the inner hole of the abutting piece 3, and the waterproof performance of a rainproof device of the microphone is further improved.

The utility model also proposes an acoustic measurement device comprising a microphone 6 and the microphone flashing device described above, as shown in fig. 5 and 6, the microphone 6 being mounted in a flashing 20. The head 61 of the sensor 6 is arranged in the waterproof cover 20, the tail of the microphone 6 is arranged outside the rainproof assembly 2, and the tail is provided with a wire which can transmit electric signals.

Taking the acoustic measurement device shown in fig. 6 as an example, the windshield 1 (i.e. a wind ball) with a diameter of 90mm is used, the material is sponge, and the matched microphone 6 is a microphone of the model MPA416 of the company limited of the reputation acoustoelectric technology of beijing. Through testing, the waterproof grade of the acoustic measurement device can reach IP54, and the influence of the microphone rainproof device on the sensitivity and the frequency response of the microphone 6 is in an allowable range. As shown in fig. 13 and 14, fig. 13 shows a graph of the frequency response measured by the outdoor microphone 6, and fig. 14 is a table of the technical parameters of the outdoor microphone 6 measured.

The foregoing is merely exemplary of the utility model and other modifications can be made without departing from the scope of the utility model.

Claims (10)

1. A microphone rain protection device, comprising:

a windshield (1) comprising a first inner cavity (10), the windshield (1) being made of a porous material; the method comprises the steps of,

rain-proof subassembly (2), including rain-proof cover (20), waterproof ventilated membrane (21) and first sealing washer (22), head (61) of microphone (6) wear to establish in rain-proof cover (20), rain-proof cover (20) are located tip in wind-proof cover (1) is equipped with opening (200), waterproof ventilated membrane (21) seal opening (200), first sealing washer (22) encircle in surface (60) of microphone (6), and with rain-proof cover (20) with microphone (6) elasticity butt.

2. Microphone rain protection device according to claim 1, characterized in that the rain cover (20) comprises a first end face (201) and a second end face (202) at two ends respectively, and a mounting hole (203) communicating the first end face (201) and the second end face (202), the first end face (201) being located inside the wind cover (1), the waterproof and breathable film (21) being provided at the first end face (201).

3. Microphone flashing according to claim 1, characterized in that the flashing (20) comprises a protruding hook (300), which hook (300) is hooked with the flashing (1).

4. A microphone rain protection device according to claim 3, characterized in that the hook (300) is ring-shaped.

5. Microphone rain protection device according to claim 1, characterized in that the windshield (1) is made of sponge, the windshield (1) being spherical.

6. Microphone rain protection device according to any of claims 1 to 5, characterized in that the rain protection cover (20) is provided with an annular cavity (220) for placing the first sealing ring (22) and a threaded hole (221) for communicating the annular cavity (220) with a second end surface (202) of the rain protection cover (20), the second end surface (202) being the end surface of the rain protection cover (20) facing the outside of the wind protection cover (1), the microphone rain protection device further comprises an abutting piece (3) screwed with the threaded hole (221), the abutting piece (3) is used for extruding the first sealing ring (22), and the abutting piece (3) is provided with a through hole (31) for the microphone (6) to penetrate.

7. Microphone rain protection device according to claim 6, characterized in that the thickness of the annular cavity (220) is smaller than the thickness of the first sealing ring (22) in its natural state, and the width of the annular supporting surface (2200) of the annular cavity (220) is smaller than or equal to the width of the first sealing ring (22) in its natural state.

8. Microphone flashing according to claim 6, characterized in that the abutment (3) comprises a convex collar (30) protruding outwards, and in that the microphone flashing comprises a second sealing ring (4) pressed between the collar (30) and the flashing (20).

9. Microphone flashing device according to claim 6, characterized in that the surface of the through hole (31) is provided with an annular seal (5) in elastic abutment with the microphone (6).

10. Acoustic measurement device, characterized by comprising a microphone (6) and a microphone flashing device according to any of claims 1 to 9, the microphone (6) being mounted in the flashing cover (20).