CN112468950A - Device and method for testing volume of sound cavity of loudspeaker - Google Patents
Device and method for testing volume of sound cavity of loudspeaker Download PDFInfo
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- CN112468950A CN112468950A CN202011513728.6A CN202011513728A CN112468950A CN 112468950 A CN112468950 A CN 112468950A CN 202011513728 A CN202011513728 A CN 202011513728A CN 112468950 A CN112468950 A CN 112468950A
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- loudspeaker
- volume
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- cavity
- screw rod
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000004044 response Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 29
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 238000012356 Product development Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a device and a method for testing the volume of a sound cavity of a loudspeaker, wherein the device comprises a loudspeaker fixing plate, a cylindrical cavity, an upper fixing plate, a screw rod and a movable sliding block; the loudspeaker fixing plate is arranged at one end of the cylindrical cavity, and the upper fixing plate is arranged at the other end of the cylindrical cavity; the periphery of the movable sliding block is matched with the inner wall of the cylindrical cavity and is arranged in the cylindrical cavity, one end of the screw rod penetrates through the upper fixing plate and is fixedly connected with the movable sliding block, and the screw rod is connected with the upper fixing plate in a threaded fit manner; the loudspeaker fixing plate is provided with a loudspeaker mounting hole for mounting a loudspeaker. A volume-variable sound cavity is formed by the cylindrical cavity, the upper fixing plate, the screw rod and the movable sliding block, the movable sliding block is driven to move by rotating the screw rod during testing, the volume of the sound cavity is changed, the optimal volume of a loudspeaker to be tested can be quickly obtained by collecting frequency response curves under the volumes of the sound cavities, the accuracy of the optimal volume is effectively enhanced, and the product development period is shortened.
Description
Technical Field
The invention relates to the field of loudspeaker testing, in particular to a loudspeaker sound cavity volume testing device and method.
Background
For loudspeakers of different manufacturers and different specifications, the optimal deviation standard volume needs to be determined when the parameters of the loudspeakers are different, and at present, a volume value of a sound cavity is generally calculated by a complex data formula during design so as to correct the problem of difference of optimal volume data of the sound cavity; however, this calculated value is not necessarily the optimum value, but is close to the optimum value. Therefore, the existing method is difficult to quickly obtain the optimal volume of the loudspeaker, and further difficult to quickly compare the tone quality of the loudspeaker with the same specification, so that the tone quality of the loudspeaker is influenced, the development workload is large, the period is long, and the test cost of the loudspeaker is increased.
Disclosure of Invention
The invention provides a device and a method for testing the volume of a sound cavity of a loudspeaker, which aim to solve the problem that the optimal volume of the sound cavity of the loudspeaker is difficult to obtain quickly in the existing scheme.
In a first aspect, a loudspeaker sound cavity volume testing device is provided, which comprises a loudspeaker fixing plate, a cylindrical cavity, an upper fixing plate, a screw rod and a movable sliding block;
the loudspeaker fixing plate is arranged at one end of the cylindrical cavity, and the upper fixing plate is arranged at the other end of the cylindrical cavity; the periphery of the movable sliding block is matched with the inner wall of the cylindrical cavity and is arranged in the cylindrical cavity, one end of the screw rod penetrates through the upper fixing plate and is fixedly connected with the movable sliding block, and the screw rod is connected with the upper fixing plate in a threaded fit manner; and the loudspeaker fixing plate is provided with a loudspeaker mounting hole for mounting a loudspeaker.
According to the loudspeaker sound cavity volume testing device provided by the scheme, the sound cavity with the variable volume is formed by the cylindrical cavity, the upper fixing plate, the screw and the movable sliding block, during testing, the loudspeaker to be tested is installed at the loudspeaker installing hole, then the movable sliding block is driven to move by rotating the screw, the volume of the sound cavity is changed, and the optimal volume of the loudspeaker to be tested can be quickly obtained by collecting the tone quality of each sound cavity under the volume.
Further, the periphery of the movable sliding block is provided with at least one sealing ring, and the sealing ring is in interference fit with the inner wall of the cylindrical cavity. Through setting up interference fit's sealing washer, can ensure the leakproofness between activity slider and the cylinder cavity inner wall, preferably set up two sealing washers, reach double seal guarantee.
Further, the activity slider centre is provided with the screw thread blind hole, the one end of screw rod with the cooperation of screw thread blind hole is connected, just the screw rod with screw thread blind hole junction spot welding is fixed or sticky fixed.
Further, the top of the screw is provided with a driving part for driving the screw to rotate, and the driving part is arranged to facilitate the stress to rotate the screw.
Further, the driving part is of an inner hexagonal structure or an outer hexagonal structure.
Further, a threaded hole matched with the external thread of the screw is formed in the middle of the upper fixing plate, and the screw is in threaded connection with the threaded hole.
Furthermore, a sealing gasket is arranged between the loudspeaker fixing plate and the cylindrical cavity, and the sealing gasket can ensure the sealing property between the loudspeaker fixing plate and the cylindrical cavity.
Further, the sealing gasket is made of silicon rubber or EV cotton.
Furthermore, the speaker mounting hole comprises a speaker sound outlet hole located in the middle of the speaker fixing plate and a wire outlet hole located on one side of the speaker sound outlet hole. The loudspeaker is arranged at the sound outlet hole of the loudspeaker, and the loudspeaker connecting wire is led out from the sound outlet hole.
In a second aspect, there is provided a loudspeaker sound cavity volume testing method, which uses the loudspeaker sound cavity volume testing device as described above for testing, and includes the following steps:
mounting a loudspeaker to be tested at a loudspeaker mounting hole on a loudspeaker fixing plate, and sealing;
sending a sound source driving signal to a loudspeaker to be tested;
the movable sliding block slides by rotating the screw rod to change the volume of the sound cavity, and a frequency response curve from low frequency to high frequency generated by the loudspeaker under the corresponding volume of the sound cavity is collected, and when the frequency response curve reaches an optimal state, the corresponding volume of the sound cavity is the optimal volume.
Advantageous effects
The invention provides a device and a method for testing the volume of a sound cavity of a loudspeaker, wherein the sound cavity with variable volume is formed by a cylindrical cavity, an upper fixing plate, a screw rod and a movable sliding block, when in testing, the loudspeaker to be tested is arranged at a mounting hole of the loudspeaker, then the screw rod is rotated to drive the movable slide block to move, the volume of the sound cavity is changed, the optimal volume of the loudspeaker to be tested can be quickly obtained by collecting the frequency response curve under each volume of the sound cavity, can quickly compare the tone quality of the loudspeaker with the same specification, effectively enhances the accuracy of the optimal volume and the sealing performance of the product, greatly improves the high-quality tone quality of the product, and meanwhile, the workload of developers is synchronously saved, the product development period is shortened, the loudspeakers with similar sizes can share one cavity, only the loudspeaker fixing plate needs to be replaced, the cavity resource sharing utilization rate is effectively enhanced, and the test cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a cross-sectional view of a volume testing device for a sound cavity of a loudspeaker according to an embodiment of the present invention;
FIG. 2 is a bottom view of a device for testing the volume of a sound cavity of a loudspeaker according to an embodiment of the present invention;
fig. 3 is a top view of a loudspeaker sound cavity volume testing device provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "center", "longitudinal", "lateral", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, an embodiment of the present invention provides a loudspeaker sound cavity volume testing device, which includes a loudspeaker fixing plate 1, a cylindrical cavity 2, an upper fixing plate 3, a screw rod 4, and a movable slider 5;
the loudspeaker fixing plate 1 is arranged at one end of the cylindrical cavity 2, and the upper fixing plate 3 is arranged at the other end of the cylindrical cavity 2; the periphery of the movable sliding block 5 is matched with the inner wall of the cylindrical cavity 2 and is arranged in the cylindrical cavity 2, one end of the screw rod 4 penetrates through the upper fixing plate 3 and is fixedly connected with the movable sliding block 5, and the screw rod 4 is connected with the upper fixing plate 3 in a threaded fit manner; the loudspeaker fixing plate 1 is provided with a loudspeaker mounting hole for mounting a loudspeaker 6.
Specifically, the speaker mounting hole includes a speaker sound outlet 11 located in the middle of the speaker fixing plate 1, and a wire outlet 12 located on one side of the speaker sound outlet 11. The loudspeaker 6 is arranged at the loudspeaker sound outlet hole 11, the loudspeaker connecting wire 61 is led out from the wire outlet hole 12, and the wire outlet hole 12 is arranged between the periphery of the loudspeaker 6 and the inner wall of the cylindrical cavity 2. Loudspeaker fixed plate 1 with be provided with sealed 7 between the cylinder cavity 2, sealed 7 can guarantee the leakproofness between loudspeaker fixed plate 1 and the cylinder cavity 2, and during the implementation, sealed 7 optional silicon rubber spare or EV cotton of filling up, loudspeaker fixed plate 1 is fixed in on the cylinder cavity 2 through assembly screw 8. Four angles of speaker fixed plate still are provided with mounting hole 9, install it through the installation screw on the test jig and can test.
In this embodiment, a threaded hole matched with the external thread of the screw rod 4 is formed in the middle of the upper fixing plate 3, and the screw rod 4 is in threaded connection with the threaded hole. During specific implementation, the threaded holes in the upper fixing plate 3 can be formed by pressing and riveting inner hexagonal nuts or candle welding nuts in the middle of the upper fixing plate 3, and can also be formed in one step.
The movable sliding block is characterized in that a threaded blind hole is formed in the middle of the movable sliding block 5, after the screw rod 4 is assembled on the upper fixing plate 3 through threads, one end of the screw rod 4 is connected with the threaded blind hole in a matched mode, and the joint of the screw rod 4 and the threaded blind hole is fixed in a spot welding mode or in an adhesive mode so as to ensure that the screw rod 4 does not loosen when rotating forwards and backwards. In other embodiments, one end of the screw rod 4 can be directly welded with the movable sliding block 5.
At least one sealing ring 51 is arranged on the periphery of the movable sliding block 5, and the sealing ring 51 is in interference fit with the inner wall of the cylindrical cavity 2. By providing the sealing ring 51 with interference fit, the sealing property between the movable slider 5 and the inner wall of the cylindrical cavity 2 can be ensured. As shown in fig. 1, two sealing rings 51 are preferably arranged in the embodiment, two annular grooves are machined on the periphery of the movable sliding block 5, one sealing ring 51 is assembled in each annular groove, and the sealing ring 51 can be a silicon rubber sealing ring, so that a double-sealing guarantee is achieved.
In this embodiment, the top of the screw rod 4 is provided with a driving portion 41 for driving the screw rod 4 to rotate, and the driving portion 41 is arranged to facilitate the force to rotate the screw rod 4. During specific implementation, the driving portion 41 can select an inner triangular structure, an inner hexagonal structure, an outer octagonal structure and the like, and only the requirement that the driving portion is convenient for stress to enable the screw rod 4 to rotate is met, as shown in fig. 3, the inner hexagonal structure is preferred in the embodiment.
In another embodiment of the present invention, a method for testing a volume of a sound cavity of a speaker by using the device for testing a volume of a sound cavity of a speaker as described above is provided, which includes the following steps:
mounting a loudspeaker to be tested at a loudspeaker mounting hole on a loudspeaker fixing plate, and then sealing; the sealing treatment comprises the steps of fixing the periphery of the loudspeaker by using an adhesive to ensure the sealing between the periphery of the loudspeaker and a loudspeaker fixing plate, and temporarily sealing a wire outlet hole by using plasticine to ensure the integral sealing property of the cavity so as to avoid influencing the frequency response of the loudspeaker;
sending a sound source driving signal to a loudspeaker to be tested;
the movable sliding block slides by rotating the screw rod to change the volume of the sound cavity, and a frequency response curve from low frequency to high frequency generated by the loudspeaker under the corresponding volume of the sound cavity is collected, and when the frequency response curve reaches an optimal state, the corresponding volume of the sound cavity is the optimal volume.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
The invention provides a device and a method for testing the volume of a sound cavity of a loudspeaker, wherein the sound cavity with variable volume is formed by a cylindrical cavity, an upper fixing plate, a screw rod and a movable sliding block, when in testing, the loudspeaker to be tested is arranged at a mounting hole of the loudspeaker, then the screw rod is rotated to drive the movable slide block to move, the volume of the sound cavity is changed, the optimal volume of the loudspeaker to be tested can be quickly obtained by collecting the frequency response curve under each volume of the sound cavity, can quickly compare the tone quality of the loudspeaker with the same specification, effectively enhances the accuracy of the optimal volume and the sealing performance of the product, greatly improves the high-quality tone quality of the product, and meanwhile, the workload of developers is synchronously saved, the product development period is shortened, the loudspeakers with similar sizes can share one cavity, only the loudspeaker fixing plate needs to be replaced, the cavity resource sharing utilization rate is effectively enhanced, and the test cost is reduced.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A loudspeaker sound cavity volume testing device is characterized by comprising a loudspeaker fixing plate, a cylindrical cavity, an upper fixing plate, a screw rod and a movable sliding block;
the loudspeaker fixing plate is arranged at one end of the cylindrical cavity, and the upper fixing plate is arranged at the other end of the cylindrical cavity; the periphery of the movable sliding block is matched with the inner wall of the cylindrical cavity and is arranged in the cylindrical cavity, one end of the screw rod penetrates through the upper fixing plate and is fixedly connected with the movable sliding block, and the screw rod is connected with the upper fixing plate in a threaded fit manner; and the loudspeaker fixing plate is provided with a loudspeaker mounting hole for mounting a loudspeaker.
2. The device for testing the volume of the sound cavity of the loudspeaker according to claim 1, wherein at least one sealing ring is arranged on the periphery of the movable sliding block, and the sealing ring is in interference fit with the inner wall of the cylindrical cavity.
3. The device for testing the volume of the sound cavity of the loudspeaker according to claim 1, wherein a threaded blind hole is formed in the center of the movable sliding block, one end of the screw rod is in fit connection with the threaded blind hole, and the joint of the screw rod and the threaded blind hole is fixed by spot welding or gluing.
4. The device for testing the volume of the sound cavity of the loudspeaker according to claim 1, wherein the top of the screw rod is provided with a driving part for driving the screw rod to rotate.
5. The device for testing the volume of the sound cavity of the loudspeaker according to claim 4, wherein the driving part has an inner hexagonal structure or an outer hexagonal structure.
6. The device for testing the volume of the sound cavity of the loudspeaker according to claim 1, wherein a threaded hole matched with the external thread of the screw is formed in the middle of the upper fixing plate, and the screw is in threaded connection with the threaded hole.
7. The device for testing the volume of the sound cavity of the loudspeaker as claimed in claim 1, wherein a sealing gasket is arranged between the loudspeaker fixing plate and the cylindrical cavity.
8. The loudspeaker sound cavity volume test device of claim 7, wherein the gasket is a silicone rubber or EV cotton.
9. The device for testing the volume of the sound cavity of the loudspeaker as claimed in claim 1, wherein the loudspeaker mounting holes comprise a loudspeaker sound outlet hole located in the middle of the loudspeaker fixing plate and a wire outlet hole located on one side of the loudspeaker sound outlet hole.
10. A method for testing the volume of a sound cavity of a loudspeaker by using the device for testing the volume of the sound cavity of the loudspeaker according to any one of claims 1 to 9, comprising the following steps:
mounting a loudspeaker to be tested at a loudspeaker mounting hole on a loudspeaker fixing plate, and sealing;
sending a sound source driving signal to a loudspeaker to be tested;
the movable sliding block slides by rotating the screw rod to change the volume of the sound cavity, and a frequency response curve from low frequency to high frequency generated by the loudspeaker under the corresponding volume of the sound cavity is collected, and when the frequency response curve reaches an optimal state, the corresponding volume of the sound cavity is the optimal volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011513728.6A CN112468950A (en) | 2020-12-21 | 2020-12-21 | Device and method for testing volume of sound cavity of loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011513728.6A CN112468950A (en) | 2020-12-21 | 2020-12-21 | Device and method for testing volume of sound cavity of loudspeaker |
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| CN112468950A true CN112468950A (en) | 2021-03-09 |
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| CN202011513728.6A Pending CN112468950A (en) | 2020-12-21 | 2020-12-21 | Device and method for testing volume of sound cavity of loudspeaker |
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| CN111654801A (en) * | 2020-06-18 | 2020-09-11 | 广东台德智联科技有限公司 | Artificial intelligence speaker frequency response test fixture |
| CN111929366A (en) * | 2020-08-13 | 2020-11-13 | 胡全红 | Novel sound insulation material's performance check out test set |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1615047A (en) * | 2004-11-19 | 2005-05-11 | 南京大学 | Unit testing method and baffle for loundspeaker |
| CN101281099A (en) * | 2008-05-16 | 2008-10-08 | 瑞声声学科技(常州)有限公司 | Test method of polytypic acoustical device |
| CN101895802A (en) * | 2010-06-11 | 2010-11-24 | 青岛海信移动通信技术股份有限公司 | Mobile terminal equipment |
| GB201111164D0 (en) * | 2011-06-30 | 2011-08-17 | Wolfson Microelectronics Plc | Low frequency acoustic source |
| CN105158292A (en) * | 2015-08-27 | 2015-12-16 | 河海大学 | Gas specific heat ratio measuring device and gas specific heat ratio measuring method |
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| CN111929366A (en) * | 2020-08-13 | 2020-11-13 | 胡全红 | Novel sound insulation material's performance check out test set |
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Application publication date: 20210309 |