CN201438762U - Sound attenuating chamber for loudspeaker pure tone online detection - Google Patents
Sound attenuating chamber for loudspeaker pure tone online detection Download PDFInfo
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- CN201438762U CN201438762U CN200920096309XU CN200920096309U CN201438762U CN 201438762 U CN201438762 U CN 201438762U CN 200920096309X U CN200920096309X U CN 200920096309XU CN 200920096309 U CN200920096309 U CN 200920096309U CN 201438762 U CN201438762 U CN 201438762U
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Abstract
The utility model relates to a sound attenuating chamber for loudspeaker pure tone online detection. A loudspeaker baffle plate is installed in the center of the upper plane of the shell of a chamber body. Two longitudinal vertical plates are symmetrically and fixedly installed in the chamber body. Transverse vertical plates are symmetrically and fixedly installed between the two longitudinal vertical plates. A microphone supporting plate is horizontally and fixedly installed in a square chamber formed by the four vertical plates. A microphone is installed on a support. The longitudinal vertical plates, the transverse vertical plates and the supporting plate are of sound-attenuating porous plates. The inner wall of the shell of the chamber body is covered by a lining wrapped by gauze. Air layers forming resonant cavities are left between the lining of the chamber body and the longitudinal vertical plates and between the lining of the chamber body and the transverse vertical plates. The utility model has the advantages that the overall structure is simple, the installation cost and the manufacturing cost are low, the loudspeaker pure tone online detection can be perfectly realized when being matched with the loudspeaker pure tone online detection instrument based on time-frequency analysis, and the health of the detection personnel is effectively protected.
Description
Technical field
The utility model belongs to the loudspeaker techniques field, especially a kind of Sound Attenuator that is used for the online detection of loudspeaker simple tone.
Background technology
At present, in the loud speaker production process, " pure tone detection " is the important procedure of product quality inspection.During detection, loud speaker is applied swept-frequency signal under the rated power, whether the response signal that detects its generation is qualified, and to satisfy the requirement of user to loudspeaker quality, the online detection of loudspeaker simple tone mainly relies on the testing staff to monitor with ear.This subjectivity monitor method not only depends on people's the sense of hearing and experience, and with operational environment and people's state very big relation is arranged, and is unfavorable for the automation of production process and the quality assurance of product.
Adopt the time frequency analysis means to realize on the loud speaker production line in real time, detect fast and automatically, accuracy of detection and detection efficiency are higher.Loudspeaker faults detection method based on time frequency analysis, by computer acquisition and analyzing responding signal, judge the quality of loud speaker, and with short time discrete Fourier transform and wavelet package transforms method signal is carried out time frequency analysis respectively, extract its feature, adopt SVMs and Artificial Neural Network to judge the quality of loud speaker.
By all kinds of literature searches both domestic and external, do not find similar apparatus and relevant research report.
Summary of the invention
The purpose of this utility model is to provide a kind of Sound Attenuator that is used for the online detection of loudspeaker simple tone, and this Sound Attenuator can effectively reduce the interference of ambient noise when loudspeaker simple tone is online to be detected, and the adverse effect that the frequency reverberation detects pure tone in the silencer box.
The technical solution of the utility model is:
A kind of Sound Attenuator that is used for the online detection of loudspeaker simple tone, it is characterized in that: by cabinet shell, speaker baffle, vertical riser, horizontal riser, detecting microphone and supporting plate thereof constitutes, the planar central lid is equipped with a speaker baffle on cabinet shell, symmetry is fixed with two vertical risers in casing, symmetry is fixed with two horizontal risers between these two vertical risers, the unsettled supporting plate that is fixed with of level in two vertical risers and two square chambeies that horizontal riser surrounded, on this supporting plate, be equipped with one and detect microphone, vertical riser, laterally riser and supporting plate are the noise elimination porous plate that is shaped on uniform through hole on it, at two vertical risers, cabinet shell inwall between two horizontal risers and the cabinet shell has posted the casing liner respectively, the inboard of the horizontal riser between two vertical risers has also posted the riser liner, equally all posted an end liner on the supporting plate and on the cabinet shell of supporting plate below, vertically all leave the air layer that forms resonant cavity between riser and horizontal riser and the casing liner, also leave the air layer that forms resonant cavity between the end liner of supporting plate below and the supporting plate.
And described casing liner, riser liner and end liner all are to be rolled into the sound absorption mineral wool that mates with cavity size with gauze.
The utlity model has significant advantage and effect, be in particular in:
1, this Sound Attenuator utilizes perforation board resonance sound absorption structure to obtain acoustically effective at special frequency channel, make by the micropore of porous plate and the vibration of the air particles of the fiber construct of sound absorption mineral wool and be subjected to damping, produce heat by friction, acoustic energy is converted into heat energy, reach acoustically effective, overall structure is simple, and manufacturing cost is lower.
2, this Sound Attenuator adopts sound absorption mineral wool and noise elimination porous plate and liner thereof to form, can effectively shield the interference of ambient noise when loudspeaker simple tone is online to be detected, effectively absorb because of reflection produce the frequency reverberation, and then, replace existing, as to be unfavorable for testing staff's health people's ear listening mode with the loudspeaker simple tone on-line detector based on time frequency analysis, global design is scientific and reasonable.
3, the utility model overall structure is simple, and it is lower that manufacturing cost is installed, and cooperates with loudspeaker simple tone on-line detector based on time frequency analysis, can the online detection of perfect realization loudspeaker simple tone, protect effectively that the testing staff's is healthy.
Description of drawings
Fig. 1 is a longitudinal cross-section of the present utility model cutaway view;
Fig. 2 is a vertical view of the present utility model;
Fig. 3 is that the A-A of Fig. 1 is to cross-sectional view.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment formation of the present utility model is specifically described in detail, but the narration of the utility model embodiment is illustrative, rather than determinate, and its protection range is as the criterion with the content of claims.
A kind of Sound Attenuator that is used for the online detection of loudspeaker simple tone, constitute by tetragonal cabinet shell 1, speaker baffle 2, vertical riser 4, horizontal riser 17, detection microphone 9 and supporting plate 11 thereof, six faces of cabinet shell all adopt has certain thickness core-board making, play the sound effect that intercepts outside noise, faying face adopts damping glue bonding; The speaker baffle of planar central lid dress on cabinet shell, its centre is shaped on elliptical aperture 3 (see figure 2)s, and this elliptical aperture is according to the size for connection configuration of tested speaker; Symmetry is fixed with two vertical risers 4 in casing, symmetry is fixed with two horizontal riser (see figure 3)s between these two vertical risers, the unsettled supporting plate (see figure 1) that is fixed with of level in two vertical risers and two square chambeies that horizontal riser surrounded, installation and measuring microphone on this supporting plate, vertically riser, supporting plate are for being shaped on the noise elimination porous plate of uniform through hole 5,12 respectively on it, and laterally riser also is this noise elimination porous plate; Cabinet shell inwall between two vertical risers, two horizontal risers and cabinet shell has posted casing liner 6,15 respectively, horizontal riser inboard between two vertical risers has all posted riser liner 8, posted end liner 10,14 respectively on the cabinet shell of supporting plate and supporting plate below, vertically leave the air layer 7,16 that forms resonant cavity between riser and horizontal riser and its casing liner respectively, also leave the air layer 13 that forms resonant cavity between the casing end liner of supporting plate below and the supporting plate.
Casing liner of the present utility model, riser liner and end liner all are to be rolled into the sound absorption mineral wool that mates with cavity size with gauze; The punching rate of noise elimination porous plate is respectively 1.1% and 0.8%, and through-hole diameter is Φ 5mm, and spacing is respectively 40 * 40 and 45 * 45.
Claims (2)
1. Sound Attenuator that is used for the online detection of loudspeaker simple tone, it is characterized in that: by cabinet shell, speaker baffle, vertical riser, horizontal riser, detecting microphone and supporting plate thereof constitutes, the planar central lid is equipped with a speaker baffle on cabinet shell, symmetry is fixed with two vertical risers in casing, symmetry is fixed with two horizontal risers between these two vertical risers, the unsettled supporting plate that is fixed with of level between two vertical risers and two square chambeies that horizontal riser surrounded, on this supporting plate, be equipped with one and detect microphone, vertical riser, laterally riser and supporting plate are the noise elimination porous plate that is shaped on uniform through hole on it, at two vertical risers, cabinet shell inwall between two horizontal risers and the cabinet shell has posted the casing liner respectively, the inboard of the horizontal riser between two vertical risers has also all posted the riser liner, equally all posted an end liner on the supporting plate and on the cabinet shell of supporting plate below, vertically all leave the air layer that forms resonant cavity between riser and horizontal riser and the casing liner, also leave the air layer that forms resonant cavity between the end liner of supporting plate below and the supporting plate.
2. the Sound Attenuator that is used for the online detection of loudspeaker simple tone according to claim 1 is characterized in that: described casing liner, riser liner and end liner all are to be rolled into the sound absorption mineral wool that mates with cavity size with gauze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920096309XU CN201438762U (en) | 2009-04-15 | 2009-04-15 | Sound attenuating chamber for loudspeaker pure tone online detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920096309XU CN201438762U (en) | 2009-04-15 | 2009-04-15 | Sound attenuating chamber for loudspeaker pure tone online detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201438762U true CN201438762U (en) | 2010-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920096309XU Expired - Fee Related CN201438762U (en) | 2009-04-15 | 2009-04-15 | Sound attenuating chamber for loudspeaker pure tone online detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201438762U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475989A (en) * | 2013-08-28 | 2013-12-25 | 苏州岸肯电子科技有限公司 | Silencing box for test speaker |
| CN103634730A (en) * | 2012-08-20 | 2014-03-12 | 上海斐讯数据通信技术有限公司 | Audio parameter automatic adjustment system and method used for mobile terminal assembling line |
| CN104349263A (en) * | 2014-09-07 | 2015-02-11 | 歌尔声学股份有限公司 | Sound-insulating box, testing device applying same and testing method thereof |
| CN105307098A (en) * | 2015-10-30 | 2016-02-03 | 歌尔声学股份有限公司 | Test tool, test system and test method |
| CN105578373A (en) * | 2014-10-14 | 2016-05-11 | 天津职业技术师范大学 | Loudspeaker pure tone detection method based on image fractal |
| CN108933986A (en) * | 2017-05-27 | 2018-12-04 | 苏州岸肯电子科技有限公司 | Producing line tests silencer box with loudspeaker |
| CN109286887A (en) * | 2018-09-20 | 2019-01-29 | 苏州岸肯电子科技有限公司 | Silencer box is used in a kind of test of loudspeaker |
| CN114627891A (en) * | 2022-05-16 | 2022-06-14 | 山东捷瑞信息技术产业研究院有限公司 | Moving coil loudspeaker quality detection method and device |
-
2009
- 2009-04-15 CN CN200920096309XU patent/CN201438762U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103634730A (en) * | 2012-08-20 | 2014-03-12 | 上海斐讯数据通信技术有限公司 | Audio parameter automatic adjustment system and method used for mobile terminal assembling line |
| CN103475989A (en) * | 2013-08-28 | 2013-12-25 | 苏州岸肯电子科技有限公司 | Silencing box for test speaker |
| CN104349263A (en) * | 2014-09-07 | 2015-02-11 | 歌尔声学股份有限公司 | Sound-insulating box, testing device applying same and testing method thereof |
| CN105578373A (en) * | 2014-10-14 | 2016-05-11 | 天津职业技术师范大学 | Loudspeaker pure tone detection method based on image fractal |
| CN105578373B (en) * | 2014-10-14 | 2019-01-15 | 天津职业技术师范大学 | A kind of loudspeaker simple tone detecting method dividing shape based on image |
| CN105307098A (en) * | 2015-10-30 | 2016-02-03 | 歌尔声学股份有限公司 | Test tool, test system and test method |
| CN105307098B (en) * | 2015-10-30 | 2018-10-19 | 歌尔股份有限公司 | A kind of test fixture, test system and test method |
| CN108933986A (en) * | 2017-05-27 | 2018-12-04 | 苏州岸肯电子科技有限公司 | Producing line tests silencer box with loudspeaker |
| CN109286887A (en) * | 2018-09-20 | 2019-01-29 | 苏州岸肯电子科技有限公司 | Silencer box is used in a kind of test of loudspeaker |
| CN114627891A (en) * | 2022-05-16 | 2022-06-14 | 山东捷瑞信息技术产业研究院有限公司 | Moving coil loudspeaker quality detection method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20110415 |