CN104349263A - Sound-insulating box, testing device applying same and testing method thereof - Google Patents
Sound-insulating box, testing device applying same and testing method thereof Download PDFInfo
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- CN104349263A CN104349263A CN201410453578.2A CN201410453578A CN104349263A CN 104349263 A CN104349263 A CN 104349263A CN 201410453578 A CN201410453578 A CN 201410453578A CN 104349263 A CN104349263 A CN 104349263A
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Abstract
The invention provides a sound-insulating box, a testing device applying the same and a testing method thereof. The sound-insulating box adopts a structure with nestification of an outer box body and an inner box body; a vibration-insulating pad is used for supporting between the two box bodies, and can eliminate the influence of the physical vibration of the outer box body on the inner box body effectively. When the sound-insulating box is in use, a cavity between the inner box body and the outer box body is in a vacuum state, sound can not spread in vacuum, so that the sound outside can be effectively insulated; meanwhile, due to a vibration-reducing locking chain and a vibration-reducing pad of the testing device, the influence of vibration on the sound-insulating box is also effectively reduced, so that the purpose of testing the SNR (Signal-to-Noise Ratio) of a microphone is well realized; in addition, during testing, the cavity between the inner box body and the outer box body of the sound-insulating box is vacuumized instead of directly putting a product in the vacuum environment for testing, so that the damage of vacuumizing to a vibration diaphragm of the microphone product can be effectively prevented; the testing device also can be used for laboratories and production lines to realize testing for the performance parameters such as sensitivity, background noise and THD (Total Harmonic Distortion) of microphones.
Description
Technical field
The present invention relates to electronic product technical field of measurement and test, particularly a kind of sound-proofing and testing apparatus and the method for testing of applying this sound proof box.
Background technology
Along with increasing of consumer electronics function, more and more higher to the performance requirement of microphone monomer, the SNR of microphone requires to reach 70dB, and in current industry, each electroacoustic laboratory and product line are difficult to the microphone products SNR test realizing SNR signal to noise ratio >=70.
Summary of the invention
The invention provides a kind of sound proof box and apply testing apparatus and the method for testing of this sound proof box, to solve the problem that laboratory and product line are difficult to realize the microphone products SNR test of SNR signal to noise ratio >=70.
For achieving the above object, the embodiment of the present invention have employed following technical scheme:
The invention provides a kind of sound proof box, comprise outer case, internal box and isolation cushion, described isolation cushion supports described internal box and is nested in described outer case, cavity is formed between described internal box and described outer case, cavity in described internal box is test inner chamber, described outer case comprises an outer case door, and described internal box comprises an internal box door, described outer case door and the setting all in T shape of described internal box door.
Preferably, described sound proof box also comprises venthole and air admission hole, the described cavity formed before making described internal box and described outer case when described venthole is for testing becomes vacuum chamber, and described air admission hole makes described cavity consistent with ambient pressure at the end of being used for test.
Preferably, described internal box and described outer case are metal material.
On the one hand, present invention also offers a kind of testing apparatus applying above-mentioned sound proof box, described testing apparatus also comprises support, damping chain and beam, and described support is for hanging described sound proof box, described damping chain, for being hung on the bracket by described sound proof box, described damping chain can eliminate described support to shake the elastic construction had an impact to described sound proof box, described beam, for supporting described support, weaken the impact of earth shock on described support.
Preferably, described testing apparatus can meet the microphone products SNR test of SNR >=70.
Preferably, described testing apparatus can also be used for the test of sensitivity of microphone, background noise, total harmonic distortion.
Again on the one hand, invention also provides and a kind ofly apply the method that above-mentioned testing apparatus carries out microphone SNR test, comprise the following steps:
Open outer case door and the internal box door of sound proof box according to this, microphone to be measured is put in the test cavity of internal box, then shut internal box door and the outer case door of sound proof box according to this;
To be found time gas to the cavity between outer case and internal box by venthole, make described cavity reach vacuum state, simultaneously because outer case door and the setting in T shape of internal box door, pressure can effective airtight outer case and internal box;
SNR test is carried out to microphone, obtains test result;
After test terminates, open air admission hole, make the cavity pressure between outer case and internal box consistent with the external world.
The beneficial effect of the embodiment of the present invention is: the structure that sound proof box adopts outer case nested with internal box, and use isolation cushion to support between two casings, isolation cushion effectively can eliminate the impact of outer case physical shock on internal box.Cavity during use between interior outer case is vacuum state, and the T-shaped design of outer case door and internal box door can effective airtight outer case and internal box, and sound can not be propagated in a vacuum, so effectively can completely cut off external voice; Simultaneously the damping chain of testing apparatus and beam also effectively reduce the impact of vibrations on sound proof box, thus well achieve the object of testing microphone SNR.In addition, be that the cavity in Sound Attenuator between outer case is found time during test, instead of product be directly placed in vacuum environment and test, can effectively prevent from vacuumizing the damage to microphone products vibrating diaphragm.
Sound proof box provided by the invention and the testing apparatus of this sound proof box of application effectively can eliminate the interference that external environment is tested microphone, except can realizing the test of microphone SNR >=70dB, in laboratory and the test that line realizes the performance parameters such as sensitivity of microphone, background noise, THD can also be produced.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of sound proof box provided by the invention;
Fig. 2 is the cutaway view of a kind of sound proof box provided by the invention along A line in Fig. 1;
Fig. 3 is a kind of structural representation applying the testing apparatus of sound proof box provided by the invention;
Fig. 4 is use sound proof box testing apparatus provided by the invention carries out SNR test method flow diagram to microphone.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Fig. 1 and Fig. 2 gives the structural representation of sound proof box provided by the present invention, described sound proof box comprises outer case 41, internal box 42 and isolation cushion 43, described isolation cushion 43 supports described internal box 42 and is nested in described outer case 41, cavity 411 is formed between described internal box 42 and described outer case 41, cavity in described internal box 42 is test inner chamber 421, described outer case 41 comprises an outer case door 412, described internal box 42 comprises an internal box door 422, described outer case door 412 and the setting all in T shape of described internal box door 422.In addition, described sound proof box also comprises venthole 44 and air admission hole 45, the described cavity 411 formed before making described internal box 42 and described outer case 41 when described venthole 44 is for testing becomes vacuum chamber, and described air admission hole 45, at the end of test, makes described cavity 411 consistent with ambient pressure.
When using described sound proof box, open outer case door 412 and internal box door 422 successively, product to be tested is put in test inner chamber 421, then internal box door 422 and outer case door 412 is closed successively, then vacuumized by venthole 44 pairs of cavitys 411, as shown in Figure 2, because outer case door 412 and internal box door 422 all adopt T-shaped setting, in cavity 411 in evacuating air process, air pressure in cavity 411 diminishes gradually, outer case door 412 and internal box door 422 are closed more closely, because sound can not be propagated in vacuum environment, so external voice can be completely cut off thoroughly, realize the object of sound insulation test.
Product because be vacuumized by the cavity 411 between outer case 41 and internal box 42, instead of be directly placed in vacuum environment and test by sound proof box provided by the present invention, can effectively prevent from vacuumizing the damage to product vibrating diaphragm.
Further, when practical application, described internal box 42 and described outer case 41 are metal material, can play electromagnetic shielding action like this, and reach above-mentioned technique effect.
Fig. 3 gives the structural representation of the testing apparatus of the above-mentioned sound proof box of application provided by the present invention, described testing apparatus comprises support 1, damping chain 2, beam 3 and above-mentioned sound proof box 4, described support 1 is for hanging described sound proof box 4, described damping chain 2, for described sound proof box 4 is suspended on described support 1, described damping chain 2 has elasticity, can effectively eliminate because described support 1 shakes impact on described sound proof box 4, described beam 3, for supporting described support 1, weakens the impact of earth shock on described support 1.
Testing apparatus provided by the present invention by sound proof box 4 by elastic shock attenuation chain 2 be suspended on support 1 effectively can be eliminated ground or supporter vibrations on the impact of sound proof box 4, beam 3 also weakens the impact of earth shock on described support 1 simultaneously, thus more effective being supplied to tests the stable test environment of inner chamber 421 1.
It should be noted that, testing apparatus provided by the invention can meet the microphone products SNR test of SNR >=70, can also be used for the test of sensitivity of microphone, background noise, total harmonic distortion simultaneously.
Fig. 4 gives the above-mentioned sound proof box testing apparatus of use provided by the present invention carries out SNR test method flow diagram to microphone, when needs carry out SNR test to microphone, open outer case door 412 and the internal box door 422 of sound proof box 4 according to this, microphone to be measured is put in the test cavity 421 of internal box 42, then shuts internal box door 422 and the outer case door 411 of sound proof box according to this; To be found time gas by the cavity 411 between venthole 44 pairs of outer case 41 and internal box 42, make described cavity 411 reach vacuum state, simultaneously because outer case door 412 and internal box door 422 setting in T shape, pressure can effective airtight outer case 41 and internal box 42; SNR test is carried out to microphone, obtains test result; After test terminates, open air admission hole 45, make cavity 411 pressure between outer case 41 and internal box 42 consistent with the external world.
In sum, the invention provides testing apparatus and the method for testing thereof of a kind of sound proof box and this sound proof box of application, the structure that wherein sound proof box employing outer case is nested with internal box, use isolation cushion to support between two casings, isolation cushion effectively can eliminate the impact of outer case physical shock on internal box.Cavity during use between interior outer case is vacuum state, and the T-shaped design of outer case door and internal box door can effective airtight outer case and internal box, and sound can not be propagated in a vacuum, so effectively can completely cut off external voice; Simultaneously the damping chain of testing apparatus and beam also effectively reduce the impact of vibrations on sound proof box, thus well achieve the object of testing microphone SNR.In addition, be that the cavity in Sound Attenuator between outer case is found time during test, instead of product be directly placed in vacuum environment and test, can effectively prevent from vacuumizing the damage to microphone products vibrating diaphragm; Testing apparatus of the present invention can also be used for laboratory and produce the test that line realizes the performance parameters such as sensitivity of microphone, background noise, THD.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (7)
1. a sound proof box, it is characterized in that, comprise outer case, internal box and isolation cushion, described isolation cushion supports described internal box and is nested in described outer case, form cavity between described internal box and described outer case, the cavity in described internal box is test inner chamber, and described outer case comprises an outer case door, described internal box comprises an internal box door, described outer case door and the setting all in T shape of described internal box door.
2. sound proof box according to claim 1, it is characterized in that, described sound proof box also comprises venthole and air admission hole, the described cavity formed before making described internal box and described outer case when described venthole is for testing becomes vacuum chamber, described air admission hole makes described cavity consistent with ambient pressure at the end of being used for test.
3. sound proof box according to claim 1, is characterized in that, described internal box and described outer case are metal material.
4. the testing apparatus of sound proof box as described in an application claim as arbitrary in claims 1 to 3, it is characterized in that, described testing apparatus also comprises support, damping chain and beam, described support is for hanging described sound proof box, described damping chain, for described sound proof box is hung on the bracket, described damping chain can eliminate described support to shake the elastic construction had an impact to described sound proof box, described beam, for supporting described support, weaken the impact of earth shock on described support.
5. testing apparatus according to claim 4, is characterized in that, described testing apparatus can meet the microphone products SNR test of SNR >=70.
6. testing apparatus according to claim 4, is characterized in that, described testing apparatus can also be used for the test of sensitivity of microphone, background noise, total harmonic distortion.
7. apply the method that testing apparatus as claimed in claim 4 carries out microphone SNR test, comprise the steps:
Open outer case door and the internal box door of sound proof box according to this, microphone to be measured is put in the test cavity of internal box, then shut internal box door and the outer case door of sound proof box according to this;
To be found time gas to the cavity between outer case and internal box by venthole, make described cavity reach vacuum state, simultaneously because outer case door and the setting in T shape of internal box door, pressure can effective airtight outer case and internal box;
SNR test is carried out to microphone, obtains test result;
After test terminates, open air admission hole, make the cavity pressure between outer case and internal box consistent with the external world.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410453578.2A CN104349263B (en) | 2014-09-07 | 2014-09-07 | The test device and its test method of a kind of sound proof box and the application sound proof box |
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| CN201410453578.2A CN104349263B (en) | 2014-09-07 | 2014-09-07 | The test device and its test method of a kind of sound proof box and the application sound proof box |
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| CN104349263B CN104349263B (en) | 2018-04-17 |
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Cited By (5)
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| CN106303885A (en) * | 2016-09-29 | 2017-01-04 | 歌尔股份有限公司 | A kind of noise control method and system and a kind of sound proof box |
| CN107566932A (en) * | 2017-09-26 | 2018-01-09 | 卢毅祥 | A kind of microphone vacuum sound insulation cup |
| CN110636432A (en) * | 2019-09-29 | 2019-12-31 | 深圳市火乐科技发展有限公司 | Microphone testing method and related equipment |
| CN111405392A (en) * | 2019-10-30 | 2020-07-10 | 徐州积木电子科技有限公司 | Sound insulation box for electric window opener |
| CN115604613A (en) * | 2022-12-01 | 2023-01-13 | 杭州兆华电子股份有限公司（Cn） | Sound interference elimination method based on sound insulation box |
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| CN107566932A (en) * | 2017-09-26 | 2018-01-09 | 卢毅祥 | A kind of microphone vacuum sound insulation cup |
| CN110636432A (en) * | 2019-09-29 | 2019-12-31 | 深圳市火乐科技发展有限公司 | Microphone testing method and related equipment |
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| CN115604613A (en) * | 2022-12-01 | 2023-01-13 | 杭州兆华电子股份有限公司（Cn） | Sound interference elimination method based on sound insulation box |
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| CN104349263B (en) | 2018-04-17 |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant before: Goertek Inc. |
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