阅读说明：本技术 一种等效自由场测试的微型喇叭测试治具 (Miniature loudspeaker test fixture of equivalent free field test ) 是由 丁红桂 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种等效自由场测试的微型喇叭测试治具本体,包括治具本体,治具本体上形成有耦合腔和使耦合腔与外界空气连通的泄压通孔。其中,耦合腔由于其体积小,测试时发声元件发出的声波集中在耦合腔内并由位于耦合腔内的收音元件收取,其隔音效果佳,等同于自由场中的无响室。同时,泄压通孔使耦合腔与大气相通,使声波的传播接近其在大气中的传播,即该测试治具的测试环境等同于自由场的测试坏境,接近喇叭的实际使用环境。由该微型喇叭测试治具测试得出的喇叭频响曲线与由自由场测出的喇叭频响曲线走势基本相同,可作为研发人员判断喇叭性能的有效依据,且该微型喇叭测试治具结构简单,成本大大低于自由场,有利于在小型企业里推广使用。(The invention discloses a micro-horn test fixture body for testing equivalent free fields, which comprises a fixture body, wherein a coupling cavity and a pressure relief through hole for communicating the coupling cavity with the outside air are formed on the fixture body. The coupling cavity is small in size, so that sound waves emitted by the sound generating element are concentrated in the coupling cavity and collected by the sound receiving element positioned in the coupling cavity during testing, the sound insulation effect is good, and the sound insulation effect is equal to that of a soundless room in a free field. Meanwhile, the coupling cavity is communicated with the atmosphere through the pressure relief through hole, so that the propagation of sound waves is close to the propagation of the sound waves in the atmosphere, namely the test environment of the test fixture is equal to the test environment of a free field and is close to the actual use environment of the loudspeaker. The loudspeaker frequency response curve that is got by this miniature loudspeaker test fixture test is the same basically with the loudspeaker frequency response curve trend that is measured by the free field, can judge the effective basis of loudspeaker performance as research and development personnel, and this miniature loudspeaker test fixture simple structure, and the cost is less than the free field greatly, is favorable to using widely in small-size enterprise.)

1. The utility model provides a miniature loudspeaker test fixture body of equivalent free field test which characterized in that, includes fixture body (1), be formed with coupling chamber (2) on fixture body (1) and make coupling chamber (2) and outside air intercommunication's pressure release through-hole (3).

2. The testing fixture body of the micro horn for testing the equivalent free field according to claim 1, wherein a sound generating element (4) and a sound receiving element (5) are arranged in the coupling cavity (2), and the pressure relief through hole (3) is located between the sound generating element (4) and the sound receiving element (5).

3. The testing fixture body for the micro horn for the equivalent free field test of claim 2, wherein the sound generating element (4) and the sound receiving element (5) are oppositely arranged at two axial sides of the coupling cavity (2), and the pressure relief through hole (3) extends along the radial direction of the coupling cavity (2).

4. The testing fixture body of the micro-horn for the equivalent free field test of claim 1, 2 or 3, wherein the number of the pressure relief through holes (3) is plural, and the plural pressure relief through holes (3) are distributed on the fixture body (1) at intervals.

5. The testing jig body of the micro-horn for the equivalent free field test of claim 1, wherein the jig body (1) comprises a sounding part support (6) for fixing the sounding element (4), and the sounding part support (6) comprises two support plates (61) which are arranged at intervals to form the pressure relief through hole (3).

6. The testing fixture body for the micro horn of the equivalent free field test of claim 5, wherein a plurality of connecting strips (62) are arranged between the two support plates (61), and the connecting strips (62) are distributed around the periphery of the support plates (61) at intervals to form a plurality of pressure relief through holes (3).

7. The testing fixture body of the micro horn for the equivalent free field test of claim 5, wherein one side of the two support plates (61) adjacent to the coupling cavity (2) is connected to form a connecting portion (63), and a connecting hole (64) for communicating the pressure relief through hole (3) and the coupling cavity (2) is formed in the connecting portion (63).

8. The testing fixture body of the micro horn for testing the equivalent free field according to claim 5, further comprising a sound receiving component support (7) for fixing the sound receiving component (5), wherein the coupling cavity (2) is formed on the sound receiving component (5) or the sound receiving component support (7), and an assembling through hole (65) for the coupling cavity (2) to be inserted is formed on the sound generating component support (6).

9. The testing fixture body of the micro-horn for testing the equivalent free field according to claim 1, wherein the coupling cavity (2) is bowl-shaped or straight cylinder-shaped.

[ technical field ] A method for producing a semiconductor device

The application relates to the field of acoustic testing, in particular to a miniature loudspeaker testing jig for testing equivalent free fields.

[ background of the invention ]

During horn research and development, two common test methods are free field test and pressure field test when a new product is subjected to performance test. The free field test precision is high, and research personnel can read various performances of the loudspeaker from the loudspeaker frequency response curve, but the cost is high. The pressure field is low in cost, but a horn frequency response curve obtained by the pressure field is a straight line before 1kHz, and research personnel cannot read the performance of the horn, so that accurate correction cannot be made on a new product.

[ summary of the invention ]

An object of this application is to provide a miniature loudspeaker test fixture of equivalent free field test, its pressure release through-hole through making coupling cavity and outside air intercommunication makes the propagation of sound wave be close to its propagation in the atmosphere, and this test fixture's test environment is equivalent to the test environment of free field promptly, is close the actual use environment of loudspeaker.

The application is realized by the following technical scheme:

the utility model provides a miniature loudspeaker test fixture of equivalent free field test, includes the tool body, be formed with the coupling chamber on the tool body and make the coupling chamber and the pressure release through-hole of outside air intercommunication.

The miniature loudspeaker test fixture for testing the equivalent free field is characterized in that a sound production element and a sound reception element are arranged in the coupling cavity, and the pressure relief through hole is located between the sound production element and the sound reception element.

According to the miniature horn test fixture for the equivalent free field test, the sound generating element and the sound receiving element are oppositely arranged on two axial sides of the coupling cavity, and the pressure relief through hole extends along the radial direction of the coupling cavity.

According to the micro-horn test fixture for the equivalent free field test, the number of the pressure relief through holes is multiple, and the pressure relief through holes are distributed on the fixture body at intervals.

The miniature horn test fixture for testing the equivalent free field comprises a fixture body, wherein the fixture body comprises a sounding part support used for fixing the sounding element, and the sounding part support comprises two support plates which are arranged at intervals and form the pressure relief through hole.

The micro-horn test fixture for the equivalent free field test has the advantages that the connecting strips are arranged between the two support plates, the number of the connecting strips is multiple, and the connecting strips are distributed around the periphery of the support plates at intervals to form the plurality of pressure relief through holes.

According to the micro horn test fixture for the equivalent free field test, one sides of the two support plates, which are close to the coupling cavity, are connected to form a connecting part, and a connecting hole for communicating the pressure relief through hole with the coupling cavity is formed in the connecting part.

The testing jig for the micro loudspeaker for the equivalent free field test further comprises a sound receiving part support for fixing the sound receiving element, the coupling cavity is formed on the sound receiving element or the sound receiving part support, and an assembling through hole for the insertion of the coupling cavity is formed on the sound generating part support.

The micro-horn test fixture for the equivalent free field test is characterized in that the coupling cavity is bowl-shaped or straight cylinder-shaped.

Compared with the prior art, the invention has the following advantages:

the invention makes the propagation of sound wave close to the propagation in the atmosphere through the pressure relief through hole which makes the coupling cavity communicate with the outside air, namely the testing environment of the testing jig is equal to the testing environment of the free field and is close to the actual using environment of the loudspeaker, the loudspeaker frequency response curve tested by the miniature loudspeaker testing jig is basically the same as the trend of the loudspeaker frequency response curve tested by the free field, and the miniature loudspeaker testing jig can be used as an effective basis for research and development personnel to judge the performance of the loudspeaker, has simple structure, has the cost greatly lower than the free field, and is beneficial to popularization and use in small enterprises.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic diagram of a conventional free field test;

FIG. 2 is a schematic structural diagram of a horn test using the present application;

FIG. 3 is a comparison graph of frequency response curves of a horn measured in a free field, a pressure field, and an equivalent free field formed by the present application, respectively;

fig. 4 is a perspective view of a micro-horn testing fixture of an equivalent free field test in accordance with an embodiment 1 of the present invention;

FIG. 5 is a front view of an embodiment 1 of a micro-horn testing fixture for equivalent free field testing according to the present application;

fig. 6 is a cross-sectional view of an embodiment 1 of a micro-horn testing fixture for equivalent free field testing according to the present application;

fig. 7 is a perspective view of a sounding member holder according to embodiment 1 of the present application;

fig. 8 is a sectional view of a sounding member holder according to embodiment 1 of the present application;

fig. 9 is a perspective view of a micro-horn testing fixture of an equivalent free field test of the present application in embodiment 2;

FIG. 10 is a cross-sectional view of an embodiment 2 of a micro-horn testing fixture for equivalent free field testing according to the present application;

fig. 11 is a perspective view of a sounding member holder according to embodiment 2 of the present application;

fig. 12 is a sectional view of a sounding member holder according to embodiment 2 of the present application;

fig. 13 is a partial enlarged view of a portion a in fig. 12.

[ detailed description ] embodiments

In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1, in the free field test, the speaker is fixed on a standard baffle in a soundless chamber for testing, wherein sound waves emitted by the speaker are propagated in the atmosphere and conform to the actual use environment of the speaker, and meanwhile, the soundless chamber is used for isolating external noise, thereby improving the accuracy of sound reception. Therefore, the testing effect is accurate, and various performances of the loudspeaker can be accurately tested. However, the construction cost of the soundless room is high, and small enterprises cannot bear the construction cost.

The invention provides a micro-horn test fixture body for equivalent free field test, wherein an embodiment 1 of the micro-horn test fixture body for equivalent free field test is shown as 1-5, and comprises a fixture body 1, a coupling cavity 2 and a pressure relief through hole 3 for communicating the coupling cavity 2 with the outside air are formed on the fixture body 1, a sound production element 4 and a sound reception element 5 are arranged in the coupling cavity 2, specifically, the sound production element 4 is a horn, and the sound reception element 5 is a microphone. Because the coupling cavity 2 is small in size, sound waves emitted by the sound generating element 4 are concentrated in the coupling cavity 2 and collected by the sound receiving element 5 positioned in the coupling cavity 2 during testing, and the sound insulation effect is good and is equal to that of a soundless room in a free field. Meanwhile, the coupling cavity 2 is communicated with the atmosphere through the pressure relief through hole 3, so that the propagation of sound waves is close to the propagation of the sound waves in the atmosphere, namely the test environment of the test fixture is equal to the test environment of a free field and is close to the actual use environment of a loudspeaker. The horn frequency response curve obtained by the test of the test fixture is shown as the curve 100 in fig. 12, wherein, as shown in fig. 12, the curve 300 is the horn frequency response curve measured by using the pressure field, and the curve 200 is the horn frequency response curve measured by using the free field. The trend of the curve 300 at 1000HZ is clearly different from that of the curve 200, whereas the trend of the curve 100 is substantially the same as that of the curve 200. The result that this miniature loudspeaker test fixture measured is close the result that the free field measured promptly, can judge the effective basis of loudspeaker performance as research and development personnel, and this miniature loudspeaker test fixture simple structure, and the cost is less than the free field greatly, is favorable to using widely in small-size enterprise.

Further, as a preferred embodiment of the present invention, but not limited thereto, the sound emitting element 4 and the sound receiving element 5 are disposed opposite to each other on two axial sides of the coupling cavity 2, and the pressure relief through hole 3 is located between the sound emitting element 4 and the sound receiving element 5 and extends along a radial direction of the coupling cavity 2. This arrangement facilitates the transmission and collection of sound.

Further, as a preferred embodiment of the present invention, but not limited thereto, the jig body 1 includes a sound emitting piece support 6 for fixing the sound emitting element 4 and a sound receiving piece support 7 for fixing the sound receiving element 5, the sound receiving piece support 7 is formed with the coupling cavity 2 and a second assembling through hole (not labeled in the figure) communicated with the coupling cavity 2 for inserting the sound receiving element 5, the sound emitting piece support 6 is formed with an assembling through hole 65 for inserting the coupling cavity 2 and the pressure relief through hole 3 communicated with the coupling cavity 2, and one side of the assembling through hole 65 away from the sound receiving piece support 7 is connected with the sound emitting element 4. The structure is reasonable in layout and good in sound measuring effect.

Further, as a preferred embodiment of the present invention, but not limited thereto, the sound generating element holder 6 includes two support plates 61 spaced apart from each other to form the pressure relief through hole 3, and as can be seen from fig. 4 and 5, the pressure relief through hole 3 is flat and long. The arrangement realizes the communication between the coupling cavity 2 and the outside air, so that sound waves are propagated in the atmosphere similarly, and the simulation of a free field test environment is realized.

Further, as a preferred embodiment of the present invention, but not limited to, a plurality of connecting strips 62 are disposed between the two support plates 61, the connecting strips 62 extend along the radial direction of the coupling cavity 2, and the plurality of connecting strips 62 are distributed around the peripheral side of the support plate 61 at intervals to form a plurality of pressure relief through holes 3. This arrangement improves the stability of the connection between the two plates 61.

Further, as a preferred embodiment of the present invention, but not limiting, the coupling cavity 2 is bowl-shaped.

Fig. 6 to 10 show an embodiment 2 of a micro-horn testing fixture for equivalent free field testing, which is different from embodiment 1 in that two support plates 61 are connected to form a connecting portion 63 at a side close to the coupling cavity 2, and a connecting hole 64 for communicating the pressure relief through hole 3 with the coupling cavity 2 is formed in the connecting portion 63. This setting satisfies promptly the intercommunication of coupling chamber 2 and outside air has improved again the syllable-dividing effect of coupling chamber 2 avoids external noise to influence the test effect, further simulates the test environment of free field.

Further, it is different from embodiment 1 in that the coupling cavity 2 is formed on the sound-receiving member 5. The arrangement is beneficial to improving the sealing performance of the coupling cavity 2 and improving the accuracy of sound reception.

Further, it is different from embodiment 1 in that the coupling chamber has a straight cylindrical shape.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application. Furthermore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms disclosed. Similar or identical methods, structures, etc. as used herein, or several technical inferences or substitutions made on the concept of the present application should be considered as the scope of the present application.