CN220493155U

CN220493155U - Microphone testing device

Info

Publication number: CN220493155U
Application number: CN202322231106.XU
Authority: CN
Inventors: 马仁杰; 周计祥; 黄显壮; 朱江涛
Original assignee: Jiangsu Liankang Information Co ltd
Current assignee: Jiangsu Liankang Information Co ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-02-13
Anticipated expiration: 2033-08-18

Abstract

The utility model relates to the technical field of microphone testing, in particular to a microphone testing device which comprises a sound absorption box body, a microphone set, a jig, a testing computer, a power amplifier, a sound card and a loudspeaker, wherein the microphone set is detachably arranged on the jig, the loudspeaker is arranged at the top of the sound absorption box body, a testing signal is triggered by the testing computer to be transmitted to the sound card, amplified by the power amplifier and then transmitted to the loudspeaker for sounding, and a sounding signal of the loudspeaker is collected by the microphone and transmitted back to the testing computer. According to the utility model, the test computer triggers the test signal to be transmitted to the sound card, and then the test signal is amplified by the power amplifier and then transmitted to the loudspeaker for sounding, and the plurality of microphones collect sounding signals of the loudspeaker and transmit the sounding signals back to the test computer, so that the test of the plurality of microphones can be completed simultaneously, the test efficiency is improved, multiple groups of manual nozzles are not required, and the test cost is greatly reduced.

Description

Microphone testing device

Technical Field

The utility model relates to the technical field of microphone testing, in particular to a microphone testing device.

Background

The development of acoustic technology relies on the development of electronics, using electroacoustic transducers and electronics, sound waves of any frequency, any waveform, and almost any intensity can be generated and received, making the scope of acoustic research far from being comparable. The acoustics are closely related to our life, are as large as ocean sonar, are as small as a mobile phone earphone, cover the aspects of our life, and along with the development of scientific technology, the updating speed of various products is gradually increased. Among them, as a widely used acoustic product, various performance parameters such as frequency response, harmonic distortion, signal to noise ratio, sensitivity, etc. are tested before shipment.

In the prior art, when a plurality of microphones are tested, a plurality of groups of manual mouth devices are required to be arranged, the devices are expensive, and the hardware cost is greatly increased, so that the technical cost is also greatly increased.

Disclosure of Invention

The utility model solves the problems in the related art, and provides the microphone testing device, which is characterized in that a testing computer triggers a testing signal to be transmitted to a sound card, and then the testing signal is amplified by a power amplifier and then transmitted to a loudspeaker for sounding, and a plurality of microphones collect sounding signals of the loudspeaker and transmit the sounding signals back to the testing computer, so that the testing of the plurality of microphones can be finished at the same time, the testing efficiency is improved, a plurality of groups of manual nozzles are not needed, and the testing cost is greatly reduced.

In order to solve the technical problems, the utility model is realized by the following technical scheme: the utility model provides a microphone testing arrangement, includes sound absorption box, microphone group, tool, test computer, power amplifier, sound card and speaker, microphone group demountable installation is on the tool, the speaker is installed in the top of sound absorption box, test computer triggers test signal and transmits sound card for, transmits the speaker sound production after power amplifier amplifies again, the sound production signal that the microphone adopted the speaker passes through the sound card and returns test computer again.

As a preferable scheme, the sound absorption box body sequentially comprises a facing metal plate, a damping sound insulation layer, a composite sound insulation metal plate and a wave absorption layer from outside to inside.

As the preferred scheme, the tool includes the anchor clamps, the anchor clamps include anchor clamps bottom plate and anchor clamps clamp plate, set up flutedly on the anchor clamps bottom plate, the microphone group is placed in the recess and is pressed tightly through the anchor clamps clamp plate, set up a plurality of sound holes on the anchor clamps clamp plate, anchor clamps pass through double-screw bolt and nut demountable installation on the bottom plate, the microphone group links to each other with microphone power supply control panel.

The sound insulation sealing plate is arranged on one side of the sound absorption box body and connected with the sliding block, the sliding block is slidably arranged on the guide rail, the sound insulation sealing plate drives the sliding block to move on the guide rail through driving of the air cylinder, and the guide rail is arranged on the bottom plate.

As an optimal scheme, the equipment cabin is arranged below the sound absorption box body, and the test computer, the power amplifier and the sound card are all arranged in the equipment cabin.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the test computer triggers the test signal to be transmitted to the sound card, and then the test signal is amplified by the power amplifier and then transmitted to the loudspeaker for sounding, and the plurality of microphones collect sounding signals of the loudspeaker and transmit the sounding signals back to the test computer, so that the test of the plurality of microphones can be completed simultaneously, the test efficiency is improved, multiple groups of manual nozzles are not required, and the test cost is greatly reduced; the application range is wide, and microphones in various forms and shapes can be tested only by replacing the clamp; the microphone is convenient to replace, the sound insulation sealing plate can be opened by being ejected out through the air cylinder, and the clamp can be taken down by unscrewing the nut so as to replace the microphone; the sound absorption box body is composed of a surface facing metal plate, a damping sound insulation layer, a composite sound insulation metal plate and a wave absorption layer, wherein the surface facing metal plate can improve the decoration effect and provide structural strength, the damping sound insulation layer provides damping vibration isolation, and the sound leakage caused by sheet resonance is prevented; the composite sound insulation metal plate is integrally sound-insulated to improve the sound insulation quantity; the wave absorbing layer is capable of absorbing internal reverberant sound and providing a free field test environment.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the sound absorbing box of the present utility model;

FIG. 3 is a schematic view of the structure of the jig and the sealing plate according to the present utility model;

fig. 4 is a schematic diagram of the test of the present utility model.

In the figure:

1. the sound absorption box body, 101, a wave absorption layer, 102, a sound insulation sealing plate, 2, a microphone set, 3, a jig, 301, a jig bottom plate, 302, a jig pressing plate, 303, a sound transmission hole, 304, a bottom plate, 305, a sliding block, 306, a guide rail, 4, a test computer, 5, a power amplifier, 6, a sound card, 7, a loudspeaker, 8, a cylinder, 9 and an equipment cabin.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

As shown in fig. 1 to 4, a microphone testing device comprises a sound absorption box 1, a microphone set 2, a jig 3, a testing computer 4, a power amplifier 5, a sound card 6 and a loudspeaker 7, wherein the microphone set 2 is detachably arranged on the jig 3, the loudspeaker 7 is arranged at the top of the sound absorption box 1, the testing computer 4 triggers a test signal to be transmitted to the sound card 6 and then transmitted to the loudspeaker 7 for sounding after being amplified by the power amplifier 5, the microphone set 2 collects sounding signals of the loudspeaker 7 and then transmits the sounding signals back to the testing computer 4 through the sound card 6, and relevant parameters of each microphone such as frequency response, harmonic distortion, sensitivity and the like are obtained through analysis software in the testing computer 4, so that the test of a plurality of microphones can be simultaneously carried out.

In one embodiment, the sound absorption box body 1 sequentially comprises a facing metal plate, a damping sound insulation layer, a composite sound insulation metal plate and a wave absorption layer 101 from outside to inside, wherein the surface facing metal plate can improve the decoration effect and provide structural strength, and the damping sound insulation layer provides damping vibration isolation to prevent sound leakage caused by sheet resonance; the composite sound insulation metal plate is integrally sound-insulated to improve the sound insulation quantity; the wave absorbing layer 101 is capable of absorbing internal reverberant sound, providing a free field test environment.

In one embodiment, the fixture 3 comprises a fixture, the fixture comprises a fixture bottom plate 301 and a fixture pressing plate 302, the fixture bottom plate 301 is provided with a groove, the microphone set 2 is placed in the groove and pressed by the fixture pressing plate 302, the fixture pressing plate 302 is fastened on the fixture bottom plate 301 through bolts, a plurality of sound transmission holes 303 are formed in the fixture pressing plate 302 and are convenient for sound transmission, the fixture is detachably mounted on the bottom plate 304 through studs and nuts and convenient to replace, the microphone set 2 is connected with a microphone power supply control board, the microphone power supply control board is provided with acquisition channels with the same number as the microphones, and the microphone power supply control board is used for supplying power to the microphone set 2 and transmitting sound signals acquired by the microphone set 2 to the test computer 4.

In one embodiment, the microphone group 2 to be tested is required to be replaced, the cylinder 8 is started to enable the sound insulation sealing plate 102 to slide outwards, so that the clamp is convenient to take down, and the microphone group 2 is replaced.

In one embodiment, the equipment cabin 9 is arranged below the sound absorption box body 1, the test computer 4, the power amplifier 5 and the sound card 6 are all arranged in the equipment cabin 9, the equipment cabin 9 is provided with radiating holes, a radiating fan is further arranged, and universal rollers are arranged at the bottom of the equipment cabin 9, so that the whole test device is convenient to move.

The above is a preferred embodiment of the present utility model, and a person skilled in the art can also make alterations and modifications to the above embodiment, therefore, the present utility model is not limited to the above specific embodiment, and any obvious improvements, substitutions or modifications made by the person skilled in the art on the basis of the present utility model are all within the scope of the present utility model.

Claims

1. A microphone testing device, characterized in that: the device comprises a sound absorption box body, a microphone set, a jig, a test computer, a power amplifier, a sound card and a loudspeaker, wherein the microphone set is detachably arranged on the jig, the loudspeaker is arranged at the top of the sound absorption box body, the sound card is respectively connected with the test computer and the power amplifier, the power amplifier is connected with the loudspeaker, and the microphone set is respectively connected with the loudspeaker and the sound card.

2. The microphone testing device of claim 1, wherein: the sound absorption box body sequentially comprises a facing metal plate, a damping sound insulation layer, a composite sound insulation metal plate and a wave absorption layer from outside to inside.

3. The microphone testing device of claim 1, wherein: the jig comprises a jig, the jig comprises a jig bottom plate and a jig pressing plate, a groove is formed in the jig bottom plate, the microphone set is placed in the groove and pressed by the jig pressing plate, a plurality of sound transmission holes are formed in the jig pressing plate, the jig is detachably arranged on the bottom plate through a stud and a nut, and the microphone set is connected with a microphone power supply control board.

4. The microphone testing device of claim 1, wherein: the sound insulation sealing plate is arranged on one side of the sound absorption box body and connected with the sliding block, the sliding block is slidably arranged on the guide rail, the sound insulation sealing plate drives the sliding block to move on the guide rail through driving of the air cylinder, and the guide rail is arranged on the bottom plate.

5. The microphone testing device of claim 1, wherein: the equipment cabin is arranged below the sound absorption box body, and the test computer, the power amplifier and the sound card are all arranged in the equipment cabin.