CN101651920B - Microphone distortion test system - Google Patents
Microphone distortion test system Download PDFInfo
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- CN101651920B CN101651920B CN 200910108212 CN200910108212A CN101651920B CN 101651920 B CN101651920 B CN 101651920B CN 200910108212 CN200910108212 CN 200910108212 CN 200910108212 A CN200910108212 A CN 200910108212A CN 101651920 B CN101651920 B CN 101651920B
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- microphone
- loud speaker
- test system
- sound
- phonocatheter
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Abstract
The invention provides a microphone distortion test system which comprises a loudspeaker, a microphone and an audio analyzing instrument, wherein the microphone is away from the loudspeaker for a certain distance; and the audio analyzing instrument is connected with the microphone. The microphone distortion test system also comprises a sound absorption material and a sonic wave guide pipe with a smooth inner wall, wherein one end of the sonic wave guide pipe is connected with the loudspeaker, and the sound absorption material is inserted into the other end of the sonic wave guide pipe; the microphone is inserted into the sonic wave guide pipe, and the sound pressure transmitted by the loudspeaker reaches the microphone by the sonic wave guide pipe. The microphone distortion test system has an accurate test result.
Description
[technical field]
The present invention relates to a kind of microphone test macro, relate in particular to microphone distortion test system under a kind of high sound intensity.
[background technology]
The microphone distortion test system of correlation technique comprise the audio amplifier that is placed in anechoic chamber, with audio amplifier microphone and the audio analyzer that is connected with microphone separated by a distance, wherein be provided with loud speaker in audio amplifier, this loud speaker is provided with voice coil loudspeaker voice coil and vibrating diaphragm.
Yet when testing microphone distortion under the high sound intensity condition, the sound pressure level that audio amplifier can produce is limited, as wants to increase the sound pressure level of audio amplifier, and needing provide very large alternating voltage to audio amplifier, surpasses the tolerance limit of sound equipment when electrical power, is easy to burn out audio amplifier.
In addition, high-power input audio amplifier causes the Oscillation Amplitude of the vibrating diaphragm of loud speaker and voice coil loudspeaker voice coil larger, causes the nonlinear distortion of loud speaker larger, and making final testing result is not the distortion of microphone, but the distortion of loud speaker causes measurement result inaccurate.
Therefore, be necessary to propose in fact a kind of new microphone distortion test system.
[summary of the invention]
Technical problem solved by the invention is to provide a kind of measurement result test macro of microphone distortion accurately.
According to the above-mentioned technical problem that needs solution, designed a kind of microphone distortion test system, it comprise loud speaker, with loud speaker microphone separated by a distance, the audio analyzer that is connected with microphone, wherein, described microphone distortion test system also comprises sound-absorbing material and is connected end and connects the acoustic waveguide tube that loud speaker, the other end are inserted with the inner wall smooth of sound-absorbing material, described microphone is inserted in acoustic waveguide tube, and the acoustic pressure that loud speaker sends arrives microphone by acoustic waveguide tube.
Preferably, described acoustic waveguide tube is provided with the tube coupling that is connected with loud speaker and the phonocatheter that is connected with tube coupling, and described microphone is inserted in phonocatheter.
Preferably, the cross section of described phonocatheter is square, and it is triangular in shape that sound-absorbing material is inserted in an end of phonocatheter.
Preferably, the cross section of described phonocatheter is rounded, and the end that sound-absorbing material is inserted in phonocatheter is conical.
Preferably, described microphone distortion test system also comprise be located at the preamplifier between audio analyzer and microphone and be located at audio analyzer and loud speaker between audio frequency power amplifier.
A kind of microphone distortion method of testing, it comprises the steps:
One loud speaker is provided;
One microphone is provided, and itself and loud speaker are separated by a distance;
One audio analyzer is provided, and it is connected to loud speaker and microphone;
One sound-absorbing material is provided;
The acoustic waveguide tube of one inner wall smooth is provided, and the one end is connected with loud speaker, the other end is inserted with sound-absorbing material; Microphone is inserted in acoustic waveguide tube, makes the acoustic pressure that loud speaker sends arrive microphone by acoustic waveguide tube, at last by audio analyzer analytical test result.
Preferably, this microphone distortion method of testing also comprises:
One preamplifier is provided, and it is located between audio analyzer and microphone;
One audio frequency power amplifier is provided, and it is located between audio analyzer and loud speaker.
Microphone distortion test system test result of the present invention is accurate.
[description of drawings]
Fig. 1 is the schematic diagram of microphone distortion test system of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, microphone distortion test system of the present invention is elaborated.
Microphone distortion test system of the present invention, it comprise loud speaker 1, with loud speaker 1 microphone 2 separated by a distance, the audio analyzer 3 that is connected with microphone 2, wherein, described microphone distortion test system also comprises sound-absorbing material 4 and is connected end connection loud speaker 1, the other end is inserted with the acoustic waveguide tube 5 of the inner wall smooth of sound-absorbing material 4, described microphone 2 is inserted in acoustic waveguide tube 5, and the acoustic pressure that described loud speaker 1 sends arrives microphone 2 by acoustic waveguide tube 5.
Described acoustic waveguide tube 5 is provided with the tube coupling 51 that is connected with loud speaker 1 and the phonocatheter 52 that is connected with tube coupling 51, and described microphone 2 is inserted in phonocatheter 52.One end of tube coupling 51 is consistent with the bore of loud speaker 1, and the other end is consistent with the shape of the cross section of phonocatheter 52.In present embodiment, the cross section of phonocatheter 52 is square, and it is triangular in shape that sound-absorbing material 4 is inserted in an end of phonocatheter 52.
The maximum length of the phonocatheter that cross section is square affects its high-frequency cut-off frequency, is uniform plane wave in waveguide pipe lower than the sound wave of the high-frequency cut-off frequency of phonocatheter, is decaying wave in waveguide pipe higher than the sound wave of high-frequency cut-off frequency.It is test sound wave that the present invention adopts plane wave, so the present invention can according to actual testing requirement, adopt the waveguide pipe of different length.For example, when test frequency was the sound wave of 1KHZ, can adopt length was the waveguide pipe of 3.4cm, and at this moment, the high-frequency cut-off frequency of waveguide pipe is 5KHZ.In like manner, the diameter of the phonocatheter that cross section is rounded affects its high-frequency cut-off frequency, and the present invention can according to actual testing requirement, adopt the waveguide pipe of different-diameter.
Preferably, described microphone distortion test system also comprise be located at the preamplifier between audio analyzer and microphone and be located at audio analyzer and loud speaker between audio frequency power amplifier.
Microphone distortion test system of the present invention, acoustic waveguide tube can be concentrated acoustic energy, so as long as provide the audio amplifier of smaller power just can obtain higher and the relatively uniform sound intensity.Because acoustic waveguide tube has certain volume, so acoustic capacitance is very large, acoustic load impedance is very large for sound source loudspeaker, so the Oscillation Amplitude of vibrating diaphragm is subjected to certain restriction, the nonlinear distortion of loud speaker itself is little, makes final test result more accurate.
The cross section of phonocatheter also can be rounded, and correspondingly, the end that sound-absorbing material is inserted in phonocatheter is conical.
Above-described is only embodiments of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (7)
1. microphone distortion test system, it comprise loud speaker, with loud speaker microphone and the audio analyzer that is connected with microphone separated by a distance, it is characterized in that: described microphone distortion test system also comprises sound-absorbing material and is connected end and connects the acoustic waveguide tube that loud speaker, the other end are inserted with the inner wall smooth of sound-absorbing material, described microphone is inserted in acoustic waveguide tube, and the acoustic pressure that loud speaker sends arrives microphone by acoustic waveguide tube.
2. microphone distortion test system according to claim 1, it is characterized in that: described acoustic waveguide tube is provided with the tube coupling that is connected with loud speaker and the phonocatheter that is connected with tube coupling, and described microphone is inserted in phonocatheter.
3. microphone distortion test system according to claim 2, it is characterized in that: the cross section of described phonocatheter is square, and it is triangular in shape that sound-absorbing material is inserted in an end of phonocatheter.
4. microphone distortion test system according to claim 2, it is characterized in that: the cross section of described phonocatheter is rounded, and the end that sound-absorbing material is inserted in phonocatheter is conical.
5. according to claim 2 or 3 or 4 described microphone distortion test systems is characterized in that: described microphone distortion test system also comprise be located at the preamplifier between audio analyzer and microphone and be located at audio analyzer and loud speaker between audio frequency power amplifier.
6. microphone distortion method of testing, it comprises the steps:
One loud speaker is provided;
One microphone is provided, and itself and loud speaker are separated by a distance;
One audio analyzer is provided, and it is connected to loud speaker and microphone;
One sound-absorbing material is provided;
The acoustic waveguide tube of one inner wall smooth is provided, and the one end is connected with loud speaker, the other end is inserted with sound-absorbing material;
Microphone is inserted in acoustic waveguide tube, makes the acoustic pressure that loud speaker sends arrive microphone by acoustic waveguide tube;
By audio analyzer analytical test result.
7. microphone distortion method of testing according to claim 6, it is characterized in that: this microphone distortion method of testing also comprises:
One preamplifier is provided, and it is located between audio analyzer and microphone;
One audio frequency power amplifier is provided, and it is located between audio analyzer and loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910108212 CN101651920B (en) | 2009-06-19 | 2009-06-19 | Microphone distortion test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910108212 CN101651920B (en) | 2009-06-19 | 2009-06-19 | Microphone distortion test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101651920A CN101651920A (en) | 2010-02-17 |
| CN101651920B true CN101651920B (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910108212 Expired - Fee Related CN101651920B (en) | 2009-06-19 | 2009-06-19 | Microphone distortion test system |
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| Country | Link |
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| CN (1) | CN101651920B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986723B (en) * | 2010-11-01 | 2014-04-30 | 瑞声声学科技(深圳)有限公司 | Test system and test method for pressure gradient microphone |
| CN101984680B (en) * | 2010-11-10 | 2014-07-09 | 瑞声声学科技(深圳)有限公司 | Test device of pressure microphone and test method thereof |
| CN102883252A (en) * | 2011-07-14 | 2013-01-16 | 上海一诺仪表有限公司 | Cone-shaped ultra-waveguide vibrator of ultrasonic transducer |
| CN103096234A (en) * | 2013-01-22 | 2013-05-08 | 青岛歌尔声学科技有限公司 | Microphone testing device and method |
| CN104640054B (en) * | 2015-02-12 | 2018-02-02 | 广东欧珀移动通信有限公司 | Mobile terminal receiver/loudspeaker method of testing and system |
| JP7009165B2 (en) * | 2017-02-28 | 2022-01-25 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | Sound pickup device, sound collection method, program and image pickup device |
| CN107277730B (en) * | 2017-05-31 | 2019-10-22 | 歌尔股份有限公司 | Acoustical testing system for electroacoustic transducer |
| CN107979802A (en) * | 2017-11-29 | 2018-05-01 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of point sound source device for microphone phased array Performance Evaluation |
| CN110392333B (en) * | 2018-04-20 | 2021-03-09 | 致伸科技股份有限公司 | Microphone detection device |
| CN109121062B (en) * | 2018-10-17 | 2023-01-13 | 杭州兆华电子股份有限公司 | High sound pressure microphone testing arrangement |
| CN109951766B (en) * | 2019-03-27 | 2021-01-22 | 苏州科达科技股份有限公司 | Microphone array correction system and method |
| CN111510842B (en) * | 2020-04-17 | 2021-08-10 | 北京百度网讯科技有限公司 | Microphone testing system and testing method |
| CN111683332B (en) * | 2020-06-08 | 2021-11-09 | 荣成歌尔电子科技有限公司 | Optical noise test system, optical noise test method and storage medium |
| CN114354761B (en) * | 2022-01-11 | 2024-01-12 | 重庆医科大学 | Device and method for measuring loss of acoustic waveguide tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292984A (en) * | 1998-03-12 | 2001-04-25 | 约翰·乌尔曼 | Directional microphone |
| CN101336011A (en) * | 2007-06-28 | 2008-12-31 | 纬创资通股份有限公司 | Microphone assembling test system and method thereof |
-
2009
- 2009-06-19 CN CN 200910108212 patent/CN101651920B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292984A (en) * | 1998-03-12 | 2001-04-25 | 约翰·乌尔曼 | Directional microphone |
| CN101336011A (en) * | 2007-06-28 | 2008-12-31 | 纬创资通股份有限公司 | Microphone assembling test system and method thereof |
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| Publication number | Publication date |
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| CN101651920A (en) | 2010-02-17 |
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Effective date of registration: 20170526 Address after: Singapore Ang Mo Kio 65 Street No. 10 techpoint Building 1 floor, No. 8 Co-patentee after: AAC Acoustic Technologies (Changzhou) Co., Ltd. Patentee after: AAC Technologies (Singapore) Co., Ltd. Address before: 518057 Nanshan District province high tech Industrial Park, Shenzhen, North West New Road, No. 18 Co-patentee before: AAC Acoustic Technologies (Changzhou) Co., Ltd. Patentee before: AAC Acoustic Technologies (Shenzhen) Co., Ltd. |
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Granted publication date: 20130522 Termination date: 20210619 |
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