CN201805550U - Acoustic test box - Google Patents
Acoustic test box Download PDFInfo
- Publication number
- CN201805550U CN201805550U CN2010201529236U CN201020152923U CN201805550U CN 201805550 U CN201805550 U CN 201805550U CN 2010201529236 U CN2010201529236 U CN 2010201529236U CN 201020152923 U CN201020152923 U CN 201020152923U CN 201805550 U CN201805550 U CN 201805550U
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- microphone
- hole
- casing
- calibrating plate
- joint
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- Expired - Lifetime
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Abstract
The utility model discloses an acoustic test box, which comprises a box body, a microphone installation part and a calibration plate part, wherein the box body is provided with through holes on a side panel and a top respectively, and the microphone installation part provided with a microphone enables the microphone to extend into the box body through the through hole on the side panel of the box body; the bottom of the calibration plate part is provided with a limit hole, and the bottom of the calibration plate part provided with the limit hole is placed into the box body through the through hole at the top of the box body; and the position of the microphone in the box body is determined through the limit hole in a calibration plate. The microphone installation part of the small test box is a whole which can be separately assembled and disassemble, so the microphone installation part is convenient for changing and calibrating the microphone. Signals of the microphone can be directly connected with joints on a flat plate through cables, so the test box is convenient to use.
Description
Technical field
The utility model relates to the acoustic measurement field, particularly a kind of test box.
Background technology
When development audio amplifier etc. was raised one's voice equipment, for the accuracy that guarantees to measure, loud speaker was measured in an airtight test box usually.When in test box the parameters,acoustic of loud speaker being measured, the position and the distance between microphone and the loud speaker of measuring microphone (as the most common microphone) are extremely important.For near-field test, the test result of same position different distance has very big difference; And apart from diverse location the frequency response of testing is also had very large influence equally.Therefore when measuring loud speaker, the distance of how accurately to locate the position of microphone and microphone and loud speaker is most important.
In existing test box, microphone often is fixed on the support or anchor clamps of bottom half depths, makes the position of microphone be difficult to be consistent.Especially for near-field test (for example 1cm or 3cm), though the position of microphone only poor 0.1mm, its test result also can differ by more than 0.1 decibel.Because the test of loud speaker needs all microphone to be calibrated before each test, therefore because the structure of existing test box and the restriction of corresponding microphone localization method, make that the result of test can have apparent in view difference each time, this has very large influence for test.
The utility model content
The purpose of this utility model is to overcome calibration that existing test box causes owing to structural defective, change the defective that the microphone operation is comparatively loaded down with trivial details, influence certainty of measurement, thereby a kind of easy use, easily adjusting, the test box of high measurement accuracy more are provided.
To achieve these goals, the utility model provides a kind of acoustical testing case, comprises casing, microphone mounting portion and calibrating plate part; Wherein,
Described casing has through hole at side panel and top, and the microphone mounting portion that microphone is installed extend into described microphone in the described casing via the through hole on the casing side panel; The bottom of described calibrating plate part includes a spacing hole, and the bottom that described calibrating plate part will comprise spacing hole places in the described casing by the through hole at casing top; Described microphone is determined its position in described casing by the spacing hole in the described calibrating plate.
In the technique scheme, described microphone mounting portion comprises flat board 2, support 8 and microphone installing hole 9; Wherein,
Described dull and stereotyped 2 are fixed together with an end of described support 8, have described microphone installing hole 9 on the other end of described support 8; Described dull and stereotyped 2 and described microphone installing hole 9 between horizontal range be described microphone in test box horizontal installation site and the distance between the casing side panel.
In the technique scheme, include first joint 5 that is connected with the signal output of described microphone in described microphone installing hole 9, second joint 3 is installed on described dull and stereotyped 2, described first joint 5 is connected with described second joint 3 via cable 7.
In the technique scheme, it is discoid that described calibrating plate partly becomes, therein mandrel segment have one with the perpendicular projection of disc level face; The diameter of described casing top through hole is less than the diameter of described disk and greater than the diameter of described projection; Described spacing hole is opened the bottom in described projection.
Advantage of the present utility model is: small-sized test box microphone of the present utility model mounting portion is the integral body that can install separately, remove, is convenient for changing, calibrates microphone.Microphone signal can by cable directly with flat board on company's head directly be connected convenient use.
Description of drawings
Fig. 1 is an acoustical testing case integral installation schematic diagram;
Fig. 2 is an acoustical testing case microphone of the present utility model mounting portion schematic diagram;
Fig. 3 is location calibrating plate schematic diagram.
The drawing explanation:
1 casing, 2 dull and stereotyped 3 second joints, 4 microphones
5 first joints, 6 screws, 7 cables, 8 supports
9 microphone installing holes, 10 spacing holes, 11 calibrating plate parts
12 microphone mounting portions, 13 projections
Embodiment
Below in conjunction with the drawings and specific embodiments test box of the present utility model is described.
As shown in Figure 1, test box of the present utility model comprises casing 1, microphone mounting portion 12 and calibrating plate part 11; Wherein, described microphone mounting portion 12 and calibrating plate part 11 all are installed on the described casing 1.Hereinafter will in conjunction with Fig. 1-Fig. 3 to the structure of each parts in the test box and between them concrete installation relation be illustrated.
As shown in Figure 2, microphone mounting portion 12 comprises flat board 2, support 8 and microphone installing hole 9.Described dull and stereotyped 2 are fixed together with an end of described support 8, have described microphone installing hole 9 on the other end of described support 8.Described microphone installing hole 9 is relevant with the horizontal installation site of described microphone in test box with flat board 2 distance in the horizontal direction.The bottom of described microphone installing hole 9 is equipped with the screw 6 that is used for fixing microphone, insert microphone in the microphone installing hole 9 after, by screw 6 fixing described microphones, and the signal output of described microphone is connected with described first joint 5.Have a through hole on described dull and stereotyped 2, and second joint 3 is installed in this through hole, be connected by cable 7 between described first joint 5 and described second joint 3, thereby the signal that microphone will be exported is transferred to outside the test box via first joint 5, cable 7, second joint 3.
As shown in Figure 3,11 one-tenth of calibrating plate parts are discoid, therein mandrel segment have one with the perpendicular projection 13 of disc level face, the bottom of this projection 13 has a spacing hole 10 with certain depth.Because the degree of depth of this spacing hole 10 is certain, if therefore the position of calibrating plate is certain, the microphone that then inserts in this spacing hole 10 also can be fixed, thereby realizes the location to microphone.
When being installed in microphone mounting portion 12 and calibrating plate 11 on the described casing 1, as shown in Figure 1, casing 1 includes two perforates, wherein on the side panel of casing, include a through hole, insert the part that it comprises support 8 and microphone installing hole 9 one ends in this casing described microphone mounting portion 12, is fixed on the side panel of described casing described dull and stereotyped 2 then.Described dull and stereotyped 2 and the side panel of casing 1 on all have the installing hole that several rows keep at a certain distance away, when being installed in flat board 2 on the side panel, can select wherein a certain row's installing hole mounting screw to realize the fixing of position each other.By this mode can in to a certain degree, regulate dull and stereotyped 2 with the casing side panel between relative position, thereby adjusting is installed in the position of the microphone in the microphone installing hole 9.Also have a through hole at the top of casing 1, the radius of this through hole should be less than the radius of the integrated disc portions of calibrating plate 11, but should be greater than the radius of the projection 13 of calibrating plate part 11.In the time of will calibrating disc portion and be placed in the casing top, the projection 13 of calibrating plate part is goed deep in the casing, the spacing hole 10 in the projection 13 be installed in microphone in the microphone installing hole 9 on same vertical axis.When the upright position of microphone is regulated, as previously mentioned, installation site between the side panel of adjusting dull and stereotyped 2 and casing 1, thereby regulate the position of described microphone, make described microphone enter spacing hole 10 fully and again can't promote in vertical direction, at this moment, microphone just will be in normal place.
Acoustical testing case of the present utility model is accurately located the position of microphone by calibrating plate, does not overlap calibrating plate if microphone has skew on horizontal level at all, and the upright position of microphone also can be determined by the spacing hole in the calibrating plate.
Above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. an acoustical testing case is characterized in that, comprises casing (1), microphone mounting portion (12) and calibrating plate part (13); Wherein,
Described casing (1) has through hole at side panel and top, and the microphone mounting portion (12) that microphone is installed extend into described microphone in the described casing (1) via the through hole on the casing side panel; The bottom of described calibrating plate part (13) includes a spacing hole (10), and the bottom that described calibrating plate part (13) will comprise spacing hole (10) places in the described casing (1) by the through hole at casing top; Described microphone is determined its position in described casing (1) by the spacing hole (10) in the described calibrating plate.
2. acoustical testing case according to claim 1 is characterized in that, described microphone mounting portion comprises flat board (2), support (8) and microphone installing hole (9); Wherein,
Described flat board (2) is fixed together with an end of described support (8), has described microphone installing hole (9) on the other end of described support (8); Horizontal range between described flat board (2) and the described microphone installing hole (9) be described microphone in test box horizontal installation site and the distance between the casing side panel.
3. acoustical testing case according to claim 2, it is characterized in that, in described microphone installing hole (9), include first joint (5) that is connected with the signal output of described microphone, second joint (3) is installed on described flat board (2), and described first joint (5) is connected with described second joint (3) via cable (7).
4. acoustical testing case according to claim 1 is characterized in that, it is discoid that described calibrating plate partly becomes, therein mandrel segment have one with the perpendicular projection (13) of disc level face; The diameter of described casing top through hole is less than the diameter of described disk and greater than the diameter of described projection (13); Described spacing hole (10) is opened the bottom in described projection (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201529236U CN201805550U (en) | 2010-04-06 | 2010-04-06 | Acoustic test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201529236U CN201805550U (en) | 2010-04-06 | 2010-04-06 | Acoustic test box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201805550U true CN201805550U (en) | 2011-04-20 |
Family
ID=43875049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201529236U Expired - Lifetime CN201805550U (en) | 2010-04-06 | 2010-04-06 | Acoustic test box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201805550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135457A (en) * | 2017-05-23 | 2017-09-05 | 杭州兆华电子有限公司 | A kind of headphone test device |
| CN110570635A (en) * | 2019-08-08 | 2019-12-13 | 浙江正泰汽车科技有限公司 | automobile turning alarm detection table |
-
2010
- 2010-04-06 CN CN2010201529236U patent/CN201805550U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135457A (en) * | 2017-05-23 | 2017-09-05 | 杭州兆华电子有限公司 | A kind of headphone test device |
| CN107135457B (en) * | 2017-05-23 | 2023-01-31 | 杭州兆华电子股份有限公司 | Headset testing device |
| CN110570635A (en) * | 2019-08-08 | 2019-12-13 | 浙江正泰汽车科技有限公司 | automobile turning alarm detection table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110420 |
|
| CX01 | Expiry of patent term |