CN102547547A - Microphone test tool, test system and test method - Google Patents
Microphone test tool, test system and test method Download PDFInfo
- Publication number
- CN102547547A CN102547547A CN2012100535587A CN201210053558A CN102547547A CN 102547547 A CN102547547 A CN 102547547A CN 2012100535587 A CN2012100535587 A CN 2012100535587A CN 201210053558 A CN201210053558 A CN 201210053558A CN 102547547 A CN102547547 A CN 102547547A
- Authority
- CN
- China
- Prior art keywords
- microphone
- test
- sound
- tested
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention provides a microphone test tool, a test system and a test method. The test tool comprises a pedestal and a sound cavity which are contacted with each other airtightly and provide an airtight sound field for a microphone to be tested, wherein the sound cavity comprises a front cavity and a rear cavity; the front cavity and the rear cavity are separated by a partition with a through hole; the through hole is formed in the center of the partition; a loudspeaker providing a test sound source is arranged in the rear cavity; and a sound hole of the loudspeaker faces the front cavity through the through hole on the partition. When the microphone to be tested and a reference microphone with the sound holes facing the test sound source are placed on the pedestal, the sound hole plane of the microphone to be tested is as same as that of the reference microphone and the microphone to be tested and the reference microphone are symmetrical about the center of the tool. According to the invention, performance parameters, such as frequency response, total harmonic distortion (THD), phase and the like, of a single microphone product or array microphone products can be tested. Compared with the original test method, the test system has more stable performance and test efficiency is higher.
Description
Technical field
The present invention relates to the microphone property technical field of measurement and test, more particularly, relate to a kind of microphone test fixture, test macro and method of testing thereof.
Background technology
Along with the extensive use of various portable type electronic products, earphone, this series products of microphone have become indispensable auxiliary communication tool in people's life, for they have the effect of high tone quality, before dispatching from the factory, all need pass through the multinomial performance test.
Conventional containing field method of testing is adopted in existing microphone test, and Fig. 1 is existing microphone test principle sketch map.As shown in Figure 1; The test macro that conventional containing field method of testing is adopted comprises measuring amplifier 1, power amplifier 2, test fixture 3, test computer 4 and the sound card 5 that links to each other with test computer 4; Provide the loud speaker 31 of measuring sound source to be arranged in the containing field (test tone chamber) of test fixture 3; The sound card 5 that links to each other with test computer 4 output sound signal under the control of test computer; This voice signal forms measuring sound source through loud speaker 31 in the test tone chamber after power amplifier 2 amplifies, 6 holes of microphone products to be tested are coupled to downwards in the test tone chamber test, and the signal that microphone products 6 to be tested produces under the effect of measuring sound source is via measuring amplifier 1 input sound card 5; The voice signal that is received by 4 pairs of sound cards of test computer is then handled, through with canonical parameter relatively obtain test result.
But, frequency response and sensitivity behaviour parameter that existing this conventional containing field method of testing can only test products, and, cause testing efficiency low because this type of method of testing is higher and cause the instability of test macro easily to the test fixture required precision.
Summary of the invention
In view of the above problems, the purpose of this invention is to provide microphone test fixture, test macro and the method for testing thereof that a kind of systematic function is stable more, testing efficiency is higher.
According to an aspect of the present invention, a kind of microphone test fixture is provided, has comprised the base and the operatic tunes, said base is that microphone to be tested provides airtight sound field with airtight contact of the said operatic tunes; Wherein,
The said operatic tunes comprises ante-chamber and back cavity, between said ante-chamber and the back cavity through one have through hole partition separate, said through hole is arranged on the center of partition;
In said back cavity, be provided with the loud speaker that measuring sound source is provided, the phonate hole of said loud speaker via the through hole on cutting off towards ante-chamber; And,
When microphone to be tested and reference microphone sound hole when measuring sound source is placed on the base, the sound plane, hole of microphone to be tested is identical with the sound plane, hole of reference microphone, the position of microphone to be tested and reference microphone position are symmetrical about the frock center.
According to a further aspect in the invention, a kind of microphone test macro is provided, has comprised measuring amplifier, power amplifier, test computer, the sound card that links to each other with test computer and aforesaid test fixture, wherein,
Said power amplifier is connected between said sound card and the said loud speaker, in order to amplify test computer through the sound card output sound signal;
Said measuring amplifier is connected between said microphone to be tested, reference microphone and the said sound card, is used to amplify the response signal that said microphone to be tested, reference microphone send.
Again on the one hand, the present invention also provides a kind of method that above-mentioned microphone test macro carries out the microphone test of using, and comprises the steps:
Measuring sound source is placed into the center through hole position that cuts off between the chamber before and after the test fixture towards base, evenly is placed on the sound hole of reference microphone and microphone to be tested on the same circumference of base in the test fixture towards sound source;
Be transferred to the loud speaker in the test fixture through test computer control sound card output test signal through power amplifier, make the loud speaker sounding in the airtight operatic tunes of test fixture, form low frequency steady testing sound field;
In said test sound field, produce response signal through measuring amplifier amplification reference microphone and microphone to be tested;
Through sound card the response signal input test computer that said measuring amplifier amplifies is obtained test result.
Utilize above-mentioned according to microphone test fixture of the present invention, test macro and method of testing thereof; Can test the performance parameter such as frequency response, THD (total harmonic distortion), phase place of single microphone products or array microphone product; More original method of testing test macro performance is more stable, and testing efficiency is higher.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present invention comprise the characteristic that the back will specify and in claim, particularly point out.Following explanation and accompanying drawing have specified some illustrative aspects of the present invention.Yet, the indication of these aspects only be some modes that can use in the variety of way of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Description of drawings
Through with reference to below in conjunction with the explanation of accompanying drawing and the content of claims, and along with to more complete understanding of the present invention, other purpose of the present invention and result will understand more and reach easy to understand.In the accompanying drawings:
Fig. 1 is existing microphone test principle sketch map;
Fig. 2 is the structural representation according to microphone test fixture of the present invention;
Fig. 3 is according to the microphone to be tested of the embodiment of the invention and the position of reference microphone;
Fig. 4 is according to a plurality of microphone to be tested of another embodiment of the present invention and the position of reference microphone;
Fig. 5 is the principle schematic according to the microphone test macro of the embodiment of the invention;
Fig. 6 is the schematic flow sheet according to the microphone method of testing of the embodiment of the invention.
Identical label is indicated similar or corresponding feature or function in institute's drawings attached.
Embodiment
Below will combine accompanying drawing that specific embodiment of the present invention is described in detail.
In the following description; Only some example embodiment of the present invention is described through the mode of explanation; Undoubtedly; Those of ordinary skill in the art can recognize, under situation without departing from the spirit and scope of the present invention, can revise described embodiment with various different modes.Therefore, accompanying drawing be described in just illustratively in essence, rather than be used to limit the protection range of claim.In addition, in this manual, identical Reference numeral indicates identical part.
Fig. 2 shows the structural representation according to microphone test fixture of the present invention.
As shown in Figure 2, microphone test fixture provided by the invention comprises the base 10 and the operatic tunes 20, and base 10 and the operatic tunes 20 airtight contacts are to ensure the seal of the test operatic tunes.This airtight contact can strengthen its seal through the O-ring seal between the contact-making surface that is arranged on the operatic tunes 20 and base 10 31, preferably uses double-deck O-ring seal.
Wherein, The outward appearance of the operatic tunes 20 is cylindrical; Comprise ante-chamber 22 and back cavity 24, between ante-chamber 22 and the back cavity 24 through one have through hole partition separate, through hole is arranged on the center of partition; In back cavity 24, be provided with the loud speaker 25 that measuring sound source is provided, the phonate hole of loud speaker 25 via the through hole on cutting off towards ante-chamber 22.Partition and loud speaker 25 are divided into two enclosed spaces with the operatic tunes 20, i.e. ante-chamber 22 and back cavity 24.
For the ease of confirming the placement location of microphone to be tested and reference microphone; In a preferred implementation of the present invention; Base plane is provided with anchor point, and the relevant position that microphone to be tested and reference microphone is placed on anchor point just can be so that the voice signal that measuring sound source sends be identical with the reference microphone place at microphone to be tested.Anchor point on the base plane is for the center being equally distributed at least two gauge points on the same circumference in the center of circle; When having only a microphone to be tested; Microphone to be tested and reference microphone are positioned at the position at diameter two ends on the circumference, and be as shown in Figure 3; When testing a plurality of microphones to be tested (array microphone) simultaneously, all microphones to be tested and reference microphone are evenly distributed on the same circumference together, and be as shown in Figure 4.
Need to prove; The purpose that array microphone is placed on the same circumference is in order to guarantee the phase test unanimity of microphone; If the phase performance parameter that need not test microphone; Also can use other aligning methods, but must guarantee that all microphone products sound Kong Jun are in the same plane.
In addition; Because in the process of microphone of same batch of test, only need change microphone to be tested or microphone array to be tested, reference microphone 40 need not to change; Therefore; Can reference microphone be fixed on the base, to strengthen the stability of test, the output signal of reference microphone is drawn test fixture through the lead hole on the base.In order to prevent the operatic tunes 20 leakage sound, guarantee that the test sound field is the sealing sound field, can also be in the bottom of reference microphone the reference microphone signal output lead position of drawing base O-ring seal is set.
In addition, in order to weaken the sound reflection in the operatic tunes 20, can also on the inwall of the operatic tunes 20, paste 0.5mm thickness sound-absorbing material, it is stable at low frequency performance that the design of sound source back cavity guarantees that sound source is sent audio signal.
Utilize test fixture shown in Figure 2; Because microphone to be tested and reference microphone are in the same test sound field together on its base; Thereby make that the stability of test macro is stronger; The test result of microphone to be tested is more accurate, and the structural design of this test fixture can also be used for testing parameters such as the frequency response, THD, phase place of single microphone products or microphone products array, and testing efficiency also is significantly improved.
Fig. 5 shows the principle schematic according to the microphone test macro of the embodiment of the invention.
As shown in Figure 5; Microphone test macro provided by the invention comprises measuring amplifier 100, power amplifier 200, test fixture 300, test computer 400 and the sound card 500 that links to each other with test computer 400; Provide the loud speaker 25 of measuring sound source to be arranged in the back cavity of test fixture 300; The sound card 500 that links to each other with test computer 400 output sound signal under the control of test computer; This voice signal forms measuring sound source through loud speaker 25 in the operatic tunes after power amplifier 200 amplifies; The sound hole of microphone to be tested 30 and reference microphone 40 is coupled in the operatic tunes downwards tests; The signal that microphone 30 reference microphone 40 to be tested produce under the effect of measuring sound source is imported sound card 500 respectively via measuring amplifier 100, and the voice signal that is received by 400 pairs of sound cards of test computer then compares processing, finally obtains the test result of microphone to be tested.
Fig. 6 is for using the method flow sketch map that above-mentioned test macro is tested microphone.
As shown in Figure 6; When needs are tested microphone products; Earlier measuring sound source (loud speaker 25) is placed into the center through hole position that cuts off between test fixture 300 front/back cavities towards base; The sound hole of reference microphone 40 and microphone 30 to be tested evenly is placed on towards sound source on the same circumference of bases in the test fixture 300 (step S610), wherein, places the order of measuring sound source and microphone and can exchange; Be transferred to the loud speaker (step S620) in the test fixture through test computer 400 control sound cards 500 output test signals through power amplifier 200 then, the loud speaker sounding forms low frequency steady testing sound field (step S630) in the airtight operatic tunes of test fixture; Reference microphone 40 produces response signal with microphone 30 to be tested and exports measuring amplifier 100 (step S640) in above-mentioned test sound field; Measuring amplifier 100 amplifies the response signal of reference microphone 40 and microphone 30 to be tested respectively, then via sound card 500 input test computers 400 to obtain test result (step S650).
As above describe according to microphone test fixture of the present invention, test macro and method of testing thereof with the mode of example with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the microphone test fixture, test macro and the method for testing thereof that propose for the invention described above, can also on the basis that does not break away from content of the present invention, make various improvement.Therefore, protection scope of the present invention should be confirmed by the content of appending claims.
Claims (8)
1. a microphone test fixture comprises the base and the operatic tunes, and said base is that microphone to be tested provides airtight sound field with airtight contact of the said operatic tunes; Wherein,
The said operatic tunes comprises ante-chamber and back cavity, between said ante-chamber and the back cavity through one have through hole partition separate, said through hole is arranged on the center of partition;
In said back cavity, be provided with the loud speaker that measuring sound source is provided, the phonate hole of said loud speaker via the through hole on cutting off towards ante-chamber; And,
When microphone to be tested and reference microphone sound hole when measuring sound source is placed on the base, the sound plane, hole of microphone to be tested is identical with the sound plane, hole of reference microphone, the position of microphone to be tested and reference microphone position are symmetrical about the frock center.
2. microphone test fixture as claimed in claim 1 wherein, is provided with O-ring seal between the contact-making surface of the said operatic tunes and base.
3. microphone test fixture as claimed in claim 2, wherein, said base is provided with anchor point, and said anchor point is for the center being equally distributed at least two gauge points on the same circumference in the center of circle.
4. microphone test fixture as claimed in claim 1 wherein, is covered with the sound-absorbing material of 0.5mm thickness on the inwall of the said operatic tunes.
5. microphone test fixture as claimed in claim 1, wherein, said reference microphone is fixed on the said base, and the signal output lead of said reference microphone is drawn said test fixture through the lead hole on the said base.
6. microphone test fixture as claimed in claim 5, wherein, the position of drawing base at the bottom of said reference microphone, said reference microphone signal output lead is provided with O-ring seal.
7. microphone test macro comprises measuring amplifier, power amplifier, test computer, the sound card that links to each other with test computer and like each described test fixture among the claim 1-6, wherein,
Said power amplifier is connected between said sound card and the said loud speaker, in order to amplify test computer through the sound card output sound signal;
Said measuring amplifier is connected between said microphone to be tested, reference microphone and the said sound card, is used to amplify the response signal that said microphone to be tested, reference microphone send.
8. an application rights requires 7 described microphone test macros to carry out the method for microphone test, comprises the steps:
Measuring sound source is placed into the center through hole position that cuts off between the chamber before and after the test fixture towards base, evenly is placed on the sound hole of reference microphone and microphone to be tested on the same circumference of base in the test fixture towards sound source;
Be transferred to the loud speaker in the test fixture through test computer control sound card output test signal through power amplifier, make the loud speaker sounding in the airtight operatic tunes of test fixture, form low frequency steady testing sound field;
In said test sound field, produce response signal through measuring amplifier amplification reference microphone and microphone to be tested;
Through sound card the response signal input test computer that said measuring amplifier amplifies is obtained test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100535587A CN102547547A (en) | 2012-03-02 | 2012-03-02 | Microphone test tool, test system and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100535587A CN102547547A (en) | 2012-03-02 | 2012-03-02 | Microphone test tool, test system and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102547547A true CN102547547A (en) | 2012-07-04 |
Family
ID=46353275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100535587A Pending CN102547547A (en) | 2012-03-02 | 2012-03-02 | Microphone test tool, test system and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102547547A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103581819A (en) * | 2012-08-03 | 2014-02-12 | 致伸科技股份有限公司 | Microphone detection method |
| CN103781010A (en) * | 2012-10-25 | 2014-05-07 | 上海耐普微电子有限公司 | Silicon microphone testing device |
| CN104105048A (en) * | 2014-07-17 | 2014-10-15 | 福建星网视易信息系统有限公司 | Detecting system, device and method for audio test of electronic device |
| CN104640055A (en) * | 2015-03-09 | 2015-05-20 | 歌尔声学股份有限公司 | Microphone testing method and testing system |
| CN104954966A (en) * | 2015-06-30 | 2015-09-30 | 歌尔声学股份有限公司 | Microphone sensitivity test tool and system |
| CN105516873A (en) * | 2015-09-25 | 2016-04-20 | 华晨汽车集团控股有限公司 | Device and method for testing sensitivity and frequency response curve of microphone |
| CN105722003A (en) * | 2016-01-20 | 2016-06-29 | 苏州搏技光电技术有限公司 | MEMS microphone testing mechanism |
| CN105744457A (en) * | 2016-04-18 | 2016-07-06 | 格云特自动化科技（深圳）有限公司 | Audio device frequency response testing device and method |
| CN105916091A (en) * | 2015-12-10 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | MIC test device and manufacturing method and use method thereof |
| CN106303879A (en) * | 2015-05-28 | 2017-01-04 | 钰太芯微电子科技（上海）有限公司 | A kind of detection device based on time-domain analysis and detection method |
| CN106454680A (en) * | 2016-11-23 | 2017-02-22 | 吟飞科技(江苏)有限公司 | Test field for speaker sound and testing method |
| WO2018190818A1 (en) * | 2017-04-12 | 2018-10-18 | Cirrus Logic International Semiconductor Ltd. | Testing of multiple electroacoustic devices |
| CN109379692A (en) * | 2018-12-19 | 2019-02-22 | 珠海市精实测控技术有限公司 | A kind of welding bell group acoustical testing shielded box |
| CN109391893A (en) * | 2017-08-10 | 2019-02-26 | 百辰光电股份有限公司 | Microphone test equipment and its method |
| CN110602623A (en) * | 2019-08-28 | 2019-12-20 | 歌尔股份有限公司 | Device and method for testing acoustic performance based on multi-channel microphone |
| CN110771180A (en) * | 2017-01-26 | 2020-02-07 | W.L.戈尔及同仁股份有限公司 | High throughput acoustic vent structure testing device |
| CN110891236A (en) * | 2018-09-09 | 2020-03-17 | 广东思派康电子科技有限公司 | Method and device for realizing production test of multi-microphone array |
| CN113056188A (en) * | 2018-12-18 | 2021-06-29 | 桑德托克斯公司 | Device for monitoring the condition of a livestock facility |
| CN113453137A (en) * | 2021-06-29 | 2021-09-28 | 四川长虹电器股份有限公司 | Method and device for detecting single-microphone abnormity in microphone array |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090304192A1 (en) * | 2008-06-05 | 2009-12-10 | Fortemedia, Inc. | Method and system for phase difference measurement for microphones |
| CN101984680A (en) * | 2010-11-10 | 2011-03-09 | 瑞声声学科技(深圳)有限公司 | Test device of pressure microphone and test method thereof |
| CN202551345U (en) * | 2012-03-02 | 2012-11-21 | 歌尔声学股份有限公司 | Fixture and system for testing microphone |
-
2012
- 2012-03-02 CN CN2012100535587A patent/CN102547547A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090304192A1 (en) * | 2008-06-05 | 2009-12-10 | Fortemedia, Inc. | Method and system for phase difference measurement for microphones |
| CN101984680A (en) * | 2010-11-10 | 2011-03-09 | 瑞声声学科技(深圳)有限公司 | Test device of pressure microphone and test method thereof |
| CN202551345U (en) * | 2012-03-02 | 2012-11-21 | 歌尔声学股份有限公司 | Fixture and system for testing microphone |
Non-Patent Citations (1)
| Title |
|---|
| 张春华: "用于校验听力设备的小型消声箱", 《铁道劳动卫生通讯》, no. 3, 30 September 1983 (1983-09-30) * |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103581819A (en) * | 2012-08-03 | 2014-02-12 | 致伸科技股份有限公司 | Microphone detection method |
| CN103781010B (en) * | 2012-10-25 | 2016-12-21 | 上海耐普微电子有限公司 | The test device of silicon microphone |
| CN103781010A (en) * | 2012-10-25 | 2014-05-07 | 上海耐普微电子有限公司 | Silicon microphone testing device |
| CN104105048A (en) * | 2014-07-17 | 2014-10-15 | 福建星网视易信息系统有限公司 | Detecting system, device and method for audio test of electronic device |
| CN104105048B (en) * | 2014-07-17 | 2017-08-25 | 福建星网视易信息系统有限公司 | Detecting system, apparatus and method for electronic equipment audio-frequency test |
| CN104640055A (en) * | 2015-03-09 | 2015-05-20 | 歌尔声学股份有限公司 | Microphone testing method and testing system |
| CN104640055B (en) * | 2015-03-09 | 2018-12-18 | 歌尔股份有限公司 | A kind of microphone test method and test macro |
| CN106303879A (en) * | 2015-05-28 | 2017-01-04 | 钰太芯微电子科技（上海）有限公司 | A kind of detection device based on time-domain analysis and detection method |
| CN106303879B (en) * | 2015-05-28 | 2024-01-16 | 钰太芯微电子科技（上海）有限公司 | Detection device and detection method based on time domain analysis |
| CN104954966B (en) * | 2015-06-30 | 2018-10-12 | 歌尔股份有限公司 | A kind of sensitivity of microphone test fixture and system |
| CN104954966A (en) * | 2015-06-30 | 2015-09-30 | 歌尔声学股份有限公司 | Microphone sensitivity test tool and system |
| CN105516873A (en) * | 2015-09-25 | 2016-04-20 | 华晨汽车集团控股有限公司 | Device and method for testing sensitivity and frequency response curve of microphone |
| CN105916091A (en) * | 2015-12-10 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | MIC test device and manufacturing method and use method thereof |
| CN105722003A (en) * | 2016-01-20 | 2016-06-29 | 苏州搏技光电技术有限公司 | MEMS microphone testing mechanism |
| CN105744457A (en) * | 2016-04-18 | 2016-07-06 | 格云特自动化科技（深圳）有限公司 | Audio device frequency response testing device and method |
| CN105744457B (en) * | 2016-04-18 | 2019-04-09 | 格云特自动化科技（深圳）有限公司 | Audio parts frequency response test device and method |
| CN106454680A (en) * | 2016-11-23 | 2017-02-22 | 吟飞科技(江苏)有限公司 | Test field for speaker sound and testing method |
| CN106454680B (en) * | 2016-11-23 | 2019-05-03 | 吟飞科技(江苏)有限公司 | The checkout area and test method of loudspeaker sound |
| CN110771180A (en) * | 2017-01-26 | 2020-02-07 | W.L.戈尔及同仁股份有限公司 | High throughput acoustic vent structure testing device |
| CN110771180B (en) * | 2017-01-26 | 2021-09-17 | W.L.戈尔及同仁股份有限公司 | Testing device of vent structure and method for quantifying acoustic parameters of test sample |
| TWI713373B (en) * | 2017-04-12 | 2020-12-11 | 英商思睿邏輯國際半導體有限公司 | Testing of multiple electroacoustic devices |
| CN110720227A (en) * | 2017-04-12 | 2020-01-21 | 思睿逻辑国际半导体有限公司 | Testing multiple electroacoustic devices |
| CN110720227B (en) * | 2017-04-12 | 2021-07-23 | 思睿逻辑国际半导体有限公司 | Apparatus and method for testing a plurality of electroacoustic devices |
| US11190890B2 (en) | 2017-04-12 | 2021-11-30 | Cirrus Logic, Inc. | Testing of multiple electroacoustic devices |
| WO2018190818A1 (en) * | 2017-04-12 | 2018-10-18 | Cirrus Logic International Semiconductor Ltd. | Testing of multiple electroacoustic devices |
| CN109391893A (en) * | 2017-08-10 | 2019-02-26 | 百辰光电股份有限公司 | Microphone test equipment and its method |
| CN110891236A (en) * | 2018-09-09 | 2020-03-17 | 广东思派康电子科技有限公司 | Method and device for realizing production test of multi-microphone array |
| CN113056188A (en) * | 2018-12-18 | 2021-06-29 | 桑德托克斯公司 | Device for monitoring the condition of a livestock facility |
| CN109379692A (en) * | 2018-12-19 | 2019-02-22 | 珠海市精实测控技术有限公司 | A kind of welding bell group acoustical testing shielded box |
| CN110602623A (en) * | 2019-08-28 | 2019-12-20 | 歌尔股份有限公司 | Device and method for testing acoustic performance based on multi-channel microphone |
| CN113453137A (en) * | 2021-06-29 | 2021-09-28 | 四川长虹电器股份有限公司 | Method and device for detecting single-microphone abnormity in microphone array |
| CN113453137B (en) * | 2021-06-29 | 2023-03-14 | 四川长虹电器股份有限公司 | Method and device for detecting single-microphone abnormity in microphone array |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102547547A (en) | Microphone test tool, test system and test method | |
| CN202551345U (en) | Fixture and system for testing microphone | |
| CN102811411B (en) | Microphone apparatus | |
| CN102165791A (en) | Dual-mode loudspeaker | |
| US9661412B2 (en) | Apparatus for providing passive stereo amplification for a portable device | |
| CN104427441B (en) | Integrated audio signal processing circuit, audio system and the method for reducing cross-talk noise | |
| TWI713373B (en) | Testing of multiple electroacoustic devices | |
| CN104640055A (en) | Microphone testing method and testing system | |
| CN101998221A (en) | Loudspeaker sound testing method and device | |
| CN104349240A (en) | Expanded electronic device and transmission system thereof | |
| CN112866853A (en) | Method and device for calibrating production line of howling earphone in transparent mode | |
| TWI429298B (en) | Microphone calibration method | |
| CN109089197A (en) | Loudspeaker monomer, loudspeaker assembly and electronic equipment | |
| CN202917067U (en) | Sound propagation demonstration instrument | |
| CN204733382U (en) | A kind of MEMS microphone | |
| CN205283820U (en) | Testing tool | |
| CN103686579B (en) | Loudspeaker abnormal sound detection method and utilize the method loudspeaker detection device | |
| CN204810549U (en) | Cone detection tool | |
| CN206835377U (en) | Loudspeaker test device and loudspeaker test equipment | |
| CN108810745A (en) | It utters long and high-pitched sounds test method, utter long and high-pitched sounds test system and relevant apparatus | |
| CN106998524A (en) | Loudspeaker test device and loudspeaker test equipment | |
| CN208112957U (en) | Acoustic product test device and acoustic product detection system | |
| CN204598294U (en) | A kind of electro-acoustic conversion device and a kind of electronic equipment | |
| CN106197882A (en) | The method judging Microspeaker module seal | |
| US9363604B2 (en) | Speaker box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120704 |