CN107343251B - audio test box - Google Patents
audio test box Download PDFInfo
- Publication number
- CN107343251B CN107343251B CN201710641055.4A CN201710641055A CN107343251B CN 107343251 B CN107343251 B CN 107343251B CN 201710641055 A CN201710641055 A CN 201710641055A CN 107343251 B CN107343251 B CN 107343251B
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- box body
- box
- sound
- microphone
- layer
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- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 229920000742 Cotton Polymers 0.000 claims abstract description 21
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 238000013016 damping Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- 229910052755 nonmetal Inorganic materials 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
Abstract
The invention discloses an audio test box capable of effectively improving the shielding and absorbing capacity of low frequency and the anti-interference capacity of a box body on ground vibration and external sound, and aims to provide an audio test box capable of effectively improving the shielding and absorbing capacity of low frequency and the anti-interference capacity of the box body on ground vibration and external sound. The invention comprises a box body formed by welding aluminum alloy, wherein a damping film box layer, at least two isolation audio frequency combination layers and a first sound absorption cotton layer are sequentially arranged in the box body from outside to inside, a microphone supporting module is arranged in the first sound absorption cotton layer, a clamp supporting module positioned right above the microphone supporting module is arranged at the upper end of the box body, and an electric cabinet module is arranged at the side end of the box body. The invention is applied to the technical field of test boxes.
Description
Technical Field
The invention relates to a test box, in particular to an audio test box.
Background
A traditional audio screen test box adopts a three-layer structure, and the materials are respectively from outside to inside: metal plate, medium density plate, sound absorbing cotton; the metal outer layer is made of aluminum alloy or alloy steel, so that the stability of the whole box body is improved, the influence of external vibration of a general degree on the box body is reduced, and a certain non-contact type sound shielding effect is achieved. The medium density board is 15-25mm thick and has good absorption and isolation effects on low frequency; the sound absorbing cotton is of a thickness of more than 50mm and is mainly used for absorbing external sound in the box body and reducing the influence of sound reflection, resonance and the like on the test. Fixing a microphone on the inner side of an audio box, placing a tested product into a sealing carrier, receiving the sound segments of different frequencies emitted by the tested product in the audio box by the microphone placed in the audio box, converting the sound segments into electric signals, transmitting the electric signals to a computer, converting the electric signals into audio curves by audio processing software, expressing the audio curves, judging the quality of the tested product by comparing the audio curves with a standard curve, and preventing defective products from flowing into the assembly; in the research and development stage, the test result is directly fed back to the low, medium and high audio performance of the product, and has more definite guiding significance on the optimization of the product.
At present, most of the audio products at home and abroad have obvious pertinence and emphasis, the frequency band which is easy to distinguish by the ears, namely the audio medium-high frequency band effect is emphasized, the audio test related equipment also has pertinence and emphasis, the audio box has better performance on medium-high frequency shielding absorption, and the low frequency is not strictly considered, so that the manufacturing and cost reduction are facilitated; with the technological progress, the storage capacity is civilian, the audio lossless format with large storage volume is popular, consumers are more and more pursuing audio products, the full-band superior performance of the audio products requires that the test equipment and the inspection equipment also meet the full-band test requirements, the ground vibration and the outside noise anti-interference capability also need to be further improved, and the short plates of the early audio box structure are easily affected by external interference in the low-frequency isolation and absorption process.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the audio test box which can effectively improve the shielding and absorbing capacity of low frequency and the anti-interference capacity of the box body on the ground vibration and the influence of external sound.
The technical scheme adopted by the invention is as follows: the invention comprises a box body formed by welding aluminum alloy, wherein a damping film box layer, at least two isolation audio frequency combination layers and a first sound absorption cotton layer are sequentially arranged in the box body from outside to inside, a microphone supporting module is arranged in the first sound absorption cotton layer, a clamp supporting module positioned right above the microphone supporting module is arranged at the upper end of the box body, and an electric cabinet module is arranged at the side end of the box body.
Further, the number of layers of the isolation audio combination layer is two, and each isolation audio combination layer comprises a medium-density wood board layer and a second sound-absorbing cotton layer which are sequentially arranged from outside to inside and are positioned in the box body.
Further, the fixture supporting module comprises a cylinder, a supporting plate, a sliding rail, a connector, an isovolumetric pressure head and a supporting seat, wherein an aluminum alloy cover plate is arranged at the upper end of the box body, the supporting seat is arranged at the upper end of the aluminum alloy cover plate, the supporting plate is arranged at the upper end of the supporting seat, the sliding rail is arranged on the end face of the supporting plate, one end of the connector is connected with the cylinder, and the other end of the connector is connected with the isovolumetric pressure head which is arranged on the sliding rail in an adapting mode.
Further, the bottom of the supporting seat is provided with an upper cavity positioned under the constant volume pressure head, an upper cavity sealing ring and a sound outlet communicated with the inside of the box body are arranged in the upper cavity of the groove, and the sound outlet is provided with a sound outlet sealing ring.
Further, the microphone support module comprises a microphone, a nonmetallic nut, a nonmetallic concentric clamp and a metal support rod, wherein the lower end of the microphone is fixed in the nonmetallic concentric clamp, the nonmetallic concentric clamp is fixed at the upper end of the metal support rod, and the nonmetallic nut is sleeved and fixed on the microphone.
Further, the electric cabinet module comprises an electric cabinet shell, a control panel, a status indication panel, a barometer, a USB interface and an RS232 interface, wherein the electric cabinet shell is fixed on the outer end face of the cabinet body, the control panel is arranged at the upper end of the electric cabinet shell, the status indication panel is arranged in the control panel, the barometer is arranged on the end face of the electric cabinet shell, and the USB interface and the RS232 interface are arranged at the side end of the electric cabinet shell.
Further, the first sound-absorbing cotton layer is arranged in a barrier-type structure at the central part in the box body.
Furthermore, shock absorption foot pads are arranged on the periphery of the lower end of the box body.
The beneficial effects of the invention are as follows: the invention comprises a box body formed by welding aluminum alloy, which is characterized in that: the novel sound-absorbing box is characterized in that a damping film box layer, at least two layers of isolation audio combination layers and a first sound-absorbing cotton layer are sequentially nested from outside to inside in the box body, a microphone supporting module is arranged in the first sound-absorbing cotton layer, a clamp supporting module right above the microphone supporting module is arranged at the upper end of the box body, an electric control box module is arranged at the side end of the box body, so that a plurality of layers of sound-insulating damping materials are added in the audio test box, the damping film box layer, at least two layers of isolation audio combination layers and the first sound-absorbing cotton layer are sequentially combined in a nested mode of the outer box body and the inner box body, and the design can effectively improve the shielding and absorbing capacity of low frequency and the anti-interference capacity of the box body on ground vibration and external sound through verification.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a middle cross-sectional view of the present invention;
FIG. 3 is a schematic view of the structure of the clamp support module;
fig. 4 is a schematic structural view of a microphone support module;
fig. 5 is a schematic structural view of the electric cabinet module.
Detailed Description
As shown in fig. 1 to 5, in this embodiment, the present invention includes a box 1 formed by welding aluminum alloy, a damping film box layer 2, two insulating audio combination layers 3 and a first sound-absorbing cotton layer 4 are nested in sequence from outside to inside in the box 1, each insulating audio combination layer 3 includes a middle-density wood board layer 31 and a second sound-absorbing cotton layer 32 which are sequentially arranged from outside to inside in the box 1, that is, one layer of the outermost layer from outside to inside of the present invention is the box 1 formed by welding aluminum alloy plates with thickness of 10mm, and the main functions of the box 1 are to make the whole body more stable; from the manufacturing process, the aluminum alloy plate is selected to be lighter than the steel plate, the controllability is higher than the board processing size by several quality levels, and the volume consistency of the box body 1 is better ensured. The second layer is made of 4mm damping rubber the damping rubber box layer 2, damping rubber box layer 2 mainly weakens external vibrations, avoids influencing the sound insulation effect of box 1. The third layer is the medium density wood board layer 31 in the first layer of the isolation audio frequency combination layer 3, which is used for isolating the influence of the external low frequency sound section on the internal environment of the box body 1. The fourth layer is the second sound-absorbing cotton layer 32 in the first layer of the isolated audio frequency combination layer 3, and mainly has the function of absorbing the influence of the middle and high frequency sound segments on the outside on the inside of the box body 1. The fifth layer is the middle-density wood board layer 31 in the second isolated audio frequency combination layer 3, and mainly acts to absorb and reduce the low-frequency sound segments emitted by the internal sound source, reduce the sound reflection and reduce the vibration caused by the sound; and at the same time, the low-frequency sound section transmitted from the outside is further isolated again. The sixth layer is the second sound-absorbing cotton layer 32 in the second audio-isolating composite layer 3, which mainly absorbs most of the sound of the internal sound source, reduces the reflection of the sound in the case 1, and also further isolates the external sound. The seventh layer is the first sound-absorbing cotton layer 4 arranged in the center of the case 1 in a barrier-type structure, and has the main function of increasing the surface area of the inner cavity, good sound-absorbing property, and capability of absorbing a large amount of sound energy inside and outside the case 1 and reducing the reverberation time. Through the design structure, the sound insulation effect of the invention in the frequency band of 500Hz-20kHz is remarkable, and the reverberation caused by noise interference and reflection of low-frequency and high-frequency sound segments is greatly reduced.
In this embodiment, a microphone supporting module 5 is disposed in the first sound absorbing cotton layer 4, the microphone supporting module 5 includes a microphone 51, a non-metal nut 52, a non-metal concentric clamp 53 and a metal supporting rod 54, the lower end of the microphone 51 is fixed in the non-metal concentric clamp 53, the non-metal concentric clamp 53 is fixed at the upper end of the metal supporting rod 54, the non-metal nut 52 is sleeved and fixed on the microphone 51, and the microphone 51 is fixed on the non-metal concentric clamp 53, which has the advantages that: isolating the microphone 51 from direct contact with metal, reducing the effects of external sounds and vibrations; the disassembly and assembly during the calibration of the microphone 51 are facilitated; the distance from the end face of the microphone 51 to the product sound outlet can be adjusted to the state that the microphone 51 is not loose and not tight; in addition, the metal supporting rod 54 is made of metal, so that the supporting strength and the weight are increased, and the tuning fork effect of the long rod caused by external vibration is effectively avoided.
In this embodiment, the upper end of the case 1 is provided with a fixture supporting module 6 located right above the microphone supporting module 5, the fixture supporting module 6 includes a cylinder 61, a supporting plate 62, a sliding rail 63, a joint 64, an isovolumetric pressure head 65 and a supporting seat 66, the upper end of the case 1 is provided with an aluminum alloy cover plate 8, the supporting seat 66 is provided with the upper end of the aluminum alloy cover plate 8, the supporting plate 62 is provided with the upper end of the supporting seat 66, the sliding rail 63 is provided with the end face of the supporting plate 62, one end of the joint 64 is connected with the cylinder 61, the other end of the joint 64 is connected with the isovolumetric pressure head 65 which is adaptively installed on the sliding rail 63, the bottom of the supporting seat 66 is provided with an upper cavity 67 located right below the isovolumetric pressure head 65, an upper cavity sealing ring 68 and an audio outlet which is communicated with the inside of the case 1 are arranged in the upper cavity 67, and the audio outlet is provided with an audio outlet sealing ring 69. The supporting plate 62 is fixed on the supporting seat 66, so that an assembly chain is reduced, the supporting plate 62 is made of alloy steel materials, the part machining precision is guaranteed, the supporting plate 62 is made of brass materials, the stability of the supporting plate is improved, vibration is reduced, and 90+/-0.1 DEG is required to be met vertically after assembly; the slide rail 63 with high precision is added to serve as a motion guide of the constant volume pressing head 65, so that the parallelism between the constant volume pressing head 65 and the supporting seat 66 is ensured to be less than 0.1 degree; the supporting seat 66 increases the hard limit of the pressing stroke of the constant volume pressing head 65, so as to ensure the consistent volume of the inner cavity of the constant volume pressing head 65 after pressing. The sealing performance of the constant volume pressure head 65 after being pressed down is ensured by adding the upper cavity sealing ring 68 and the sound outlet sealing ring 69.
In this embodiment, the side end of the box body 1 is provided with an electric cabinet module 7, the electric cabinet module 7 includes an electric cabinet housing 71, a control panel 72, a status indication panel 73, a barometer 74, a USB interface 75 and an RS232 interface 76, the RS232 interface 76 is one of the serial communication interfaces of the current mainstream the electric cabinet housing 71 is fixed on the outer end face of the box body 1, the control panel 72 is disposed at the upper end of the electric cabinet housing 71, the status indication panel 73 is disposed in the control panel 72, the barometer 74 is disposed on the end face of the electric cabinet housing 71, and the USB interface 75 and the RS232 interface 76 are disposed on the side end of the electric cabinet housing 71. The beneficial effect of this design is: fixing the electric cabinet housing 71 outside the cabinet 1, there is no control element to influence the test on sound reflection and noise generation; the electric cabinet module 7 is modularly designed, and only the carrier and the pressure head are required to be changed after the product is changed, so that the box body 1 is improved in universality; the external USB interface 75 and the external RS232 interface 76 are used for controlling the programming of the board and the control of the computer without opening the box, so that the operation is simple and convenient.
In this embodiment, shock-absorbing foot pads 9 are disposed around the lower end of the case 1.
The invention is applied to the technical field of test boxes.
While the embodiments of this invention have been described in terms of practical aspects, they are not to be construed as limiting the meaning of this invention, and modifications to the embodiments and combinations with other aspects thereof will be apparent to those skilled in the art from this description.
Claims (3)
1. The utility model provides an audio test box, includes box (1) that aluminum alloy welded formed, its characterized in that: the novel sound absorption box is characterized in that a damping film box layer (2), at least two layers of isolation audio frequency combination layers (3) and a first sound absorption cotton layer (4) are sequentially arranged inside the box body (1) from outside to inside, a microphone supporting module (5) is arranged in the first sound absorption cotton layer (4), a clamp supporting module (6) which is positioned right above the microphone supporting module (5) is arranged at the upper end of the box body (1), and an electric control box module (7) is arranged at the side end of the box body (1); the number of the isolation audio frequency combination layers (3) is two, and each isolation audio frequency combination layer (3) is positioned in the box body (1) from outside to inside and is provided with a medium-density wood board layer (31) and a second sound-absorbing cotton layer (32) in sequence; the first sound-absorbing cotton layer (4) is arranged in a barrier-type structure at the central part in the box body (1); damping foot pads (9) are arranged around the lower end of the box body (1); the fixture supporting module (6) comprises an air cylinder (61), a supporting plate (62), a sliding rail (63), a joint (64), an isovolumetric pressure head (65) and a supporting seat (66), wherein an aluminum alloy cover plate (8) is arranged at the upper end of the box body (1), the supporting seat (66) is arranged at the upper end of the aluminum alloy cover plate (8), the supporting plate (62) is arranged at the upper end of the supporting seat (66), the sliding rail (63) is arranged on the end face of the supporting plate (62), one end of the joint (64) is connected with the air cylinder (61), and the other end of the joint (64) is connected with the isovolumetric pressure head (65) which is adaptively arranged on the sliding rail (63). The microphone support module (5) comprises a microphone (51), a nonmetallic nut (52), a nonmetallic concentric clamp (53) and a metal support rod (54), wherein the lower end of the microphone (51) is fixed in the nonmetallic concentric clamp (53), the nonmetallic concentric clamp (53) is fixed at the upper end of the metal support rod (54), and the nonmetallic nut (52) is sleeved and fixed on the microphone (51).
2. The audio test box of claim 1, wherein: the bottom of the supporting seat (66) is provided with a groove upper cavity (67) positioned under the constant volume pressure head (65), an upper cavity sealing ring (68) and a sound outlet communicated with the inside of the box body (1) are arranged in the groove upper cavity (67), and the sound outlet is provided with a sound outlet sealing ring (69).
3. The audio test box of claim 1, wherein: the electric cabinet module (7) comprises an electric cabinet shell (71), a control panel (72), a state indication panel (73), a barometer (74), a USB interface (75) and an RS232 interface (76), wherein the electric cabinet shell (71) is fixed on the outer end face of the cabinet body (1), the control panel (72) is arranged at the upper end of the electric cabinet shell (71), the state indication panel (73) is arranged in the control panel (72), the barometer (74) is arranged on the end face of the electric cabinet shell (71), and the USB interface (75) and the RS232 interface (76) are arranged on the side end of the electric cabinet shell (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641055.4A CN107343251B (en) | 2017-07-31 | 2017-07-31 | audio test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641055.4A CN107343251B (en) | 2017-07-31 | 2017-07-31 | audio test box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107343251A CN107343251A (en) | 2017-11-10 |
| CN107343251B true CN107343251B (en) | 2023-11-21 |
Family
ID=60217545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710641055.4A Active CN107343251B (en) | 2017-07-31 | 2017-07-31 | audio test box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107343251B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246572B (en) * | 2018-09-25 | 2020-12-01 | 上海金东唐科技有限公司 | Frequency response test jig and microphone parameter test system |
| CN110784815B (en) * | 2019-11-05 | 2021-02-12 | 苏州市精创测控技术有限公司 | Device and method for testing acoustic performance of product |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204392572U (en) * | 2014-12-15 | 2015-06-10 | 深圳市佳晨科技有限公司 | A kind of sound proof box |
| CN106645812A (en) * | 2016-10-27 | 2017-05-10 | 中国航空工业集团公司洛阳电光设备研究所 | General tester for testing different types of aviation products |
| CN206195894U (en) * | 2016-09-29 | 2017-05-24 | 深圳市马太智能科技有限公司 | Audio frequency radio frequency test box and audio frequency radio frequency test equipment |
| CN206196055U (en) * | 2016-10-25 | 2017-05-24 | 珠海市运泰利自动化设备有限公司 | Speaker test board |
| CN207150831U (en) * | 2017-07-31 | 2018-03-27 | 珠海市运泰利自动化设备有限公司 | Audio-frequency test case |
-
2017
- 2017-07-31 CN CN201710641055.4A patent/CN107343251B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204392572U (en) * | 2014-12-15 | 2015-06-10 | 深圳市佳晨科技有限公司 | A kind of sound proof box |
| CN206195894U (en) * | 2016-09-29 | 2017-05-24 | 深圳市马太智能科技有限公司 | Audio frequency radio frequency test box and audio frequency radio frequency test equipment |
| CN206196055U (en) * | 2016-10-25 | 2017-05-24 | 珠海市运泰利自动化设备有限公司 | Speaker test board |
| CN106645812A (en) * | 2016-10-27 | 2017-05-10 | 中国航空工业集团公司洛阳电光设备研究所 | General tester for testing different types of aviation products |
| CN207150831U (en) * | 2017-07-31 | 2018-03-27 | 珠海市运泰利自动化设备有限公司 | Audio-frequency test case |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107343251A (en) | 2017-11-10 |
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