CN218830638U

CN218830638U - Electroacoustic test simulation nozzle

Info

Publication number: CN218830638U
Application number: CN202222870317.3U
Authority: CN
Inventors: 丁红桂; 范景
Original assignee: Minami Electroacoustic Co Ltd
Current assignee: Minami Electroacoustic Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-07
Anticipated expiration: 2032-10-28

Abstract

The utility model belongs to sound test field especially relates to an electroacoustic test emulation mouth, including the test support, locate the loudspeaker subassembly in the test support, and locate the leather suit between test support and the loudspeaker subassembly, and the test support, the loudspeaker subassembly, and be formed with the pressure field chamber between the leather suit jointly, in using, the sound signal that patent emulation mouth sent is picked up to the microphone, because of this signal low frequency is lossless (no decay), need not do the low frequency compensation during calibration, but down reduce, so can not increase the bearing power for patent emulation mouth, work under rated power always during the calibration of patent emulation mouth, the distortion is very little, emulation mouth low frequency extension is effectual, can satisfy the microphone performance test requirement (especially of the product of making an uproar) that the low frequency (20-100 Hz) required height, the defect of the serious decay of the low frequency of traditional emulation mouth below 100Hz has been compensatied.

Description

Electroacoustic test simulation nozzle

[ technical field ] A method for producing a semiconductor device

The utility model belongs to sound test field especially relates to an electroacoustic test emulation mouth.

[ background of the invention ]

The current electroacoustic application market widely applies a sound source with a simulated mouth simulating a sound field near a human mouth, and is suitable for testing acoustic parameter indexes of a telephone transmitter and a microphone (microphone) used in a voice communication network, and the testing principle is as shown in fig. 5: the simulated mouth response curve (shown as a solid line in fig. 5) is detected by a standard microphone, and then a straight line after the simulated mouth response curve becomes zero by EQ compensation is used as a standard microphone frequency response curve as a reference curve.

In the simulation mouth applied in the application field of the electroacoustic industry in the market, the attenuation of the free field frequency response of the response curve below 100Hz is too serious, the attenuation is nearly 20dB, when the simulation mouth is calibrated by using a standard microphone, the simulation mouth needs to be compensated by nearly 20dB (as shown by a dotted line in figure 5) near 20Hz, the distortion of the simulation mouth is very large, even the simulation mouth cannot bear high power, the simulation mouth is burnt, and therefore the simulation mouth can only be calibrated from 100Hz reluctantly from the safety viewpoint. Therefore, when the microphone is tested by applying the simulation mouth, the acoustic performance of the microphone with the frequency band of less than 20-100Hz is analyzed; especially in the current era of popular noise reduction products, the performance of the frequency band of 20-100Hz is very important for the requirement of a microphone, and the detection effect of the simulation mouth on the current market has defects on the performance below 100 Hz.

[ Utility model ] content

An object of the utility model is to provide a reduce the electroacoustic test emulation mouth of distortion through reducing the low frequency decay.

The utility model discloses realized by following technical scheme:

an electro-acoustic testing simulation mouth comprising:

the test bracket is internally provided with a bracket cavity, one end of the test bracket is provided with an assembling port communicated with the bracket cavity, and the other end of the test bracket is provided with a sound outlet communicated with the bracket cavity;

the loudspeaker assembly is arranged in the bracket cavity and used for converting the electric signal into a sound signal;

the leather sleeve piece is arranged between the test bracket and the loudspeaker component;

the test support, the loudspeaker subassembly and the leather external member form a pressure field cavity together, and the sound signal is sent out from the sound outlet hole after passing through the pressure field cavity.

The electro-acoustic testing simulation mouth as described above, the horn assembly comprising:

the shell is internally provided with a shell cavity, and one end of the shell is provided with an assembling port;

the horn body is arranged in the shell cavity;

the surface cover body is connected with one end of an assembling port of the outer shell and forms the outer shell cavity together with the outer shell, and a first through hole which is arranged opposite to the horn body and a second through hole which communicates the outer shell cavity and the pressure field cavity are formed in the surface cover body;

and one end of the connecting terminal is connected with the horn body, and the other end of the connecting terminal extends out of the outer shell.

As above, the loudspeaker component further comprises a tuning net arranged on the face cover body, and the tuning net covers the second through hole.

According to the electroacoustic test simulation mouth, the detachable connecting mechanism used for detachably connecting the shell body and the face cover body is arranged between the shell body and the face cover body.

As above, the electroacoustic test simulation nozzle comprises a plurality of clamping hooks arranged at the lower end of the face cover body and clamping grooves arranged on the inner wall of the outer shell and clamped and matched with the clamping hooks.

According to the electroacoustic test simulation nozzle, the clamping hooks are arranged at equal intervals along the circumferential direction of the surface cover body.

The electroacoustic test simulation nozzle further comprises a test frame base which is connected with one end of the assembling port of the test support and forms the support cavity together with the test support.

According to the electroacoustic test simulation nozzle, the shell is provided with the yielding through hole for the connecting terminal to pass through, and the side wall of the test support is provided with the through groove for the connecting terminal to pass through.

According to the electroacoustic test simulation nozzle, the through grooves of the support are waist-shaped through grooves, and the through grooves of the support are arranged at equal intervals in the circumferential direction of the test support.

According to the electroacoustic test simulation nozzle, the side wall of the shell is provided with the plurality of shell through holes, and the plurality of shell through holes are arranged at equal intervals along the circumferential direction of the shell.

Compared with the prior art, the utility model discloses there is following advantage:

the utility model provides an electroacoustic test emulation mouth, including the test support, locate the loudspeaker subassembly in the test support, and locate the leather suit between test support and the loudspeaker subassembly, and the test support, loudspeaker subassembly, and be formed with the pressure field chamber between the leather suit jointly, during the use, the acoustic signal that patent emulation mouth sent is picked up to the microphone, because of this signal low frequency is lossless (no decay), need not do the low frequency compensation during calibration, but down reduce, so can not increase the bearing capacity for patent emulation mouth, work under rated power always during patent emulation mouth calibration, the distortion is very little, emulation mouth low frequency extension is effectual, can satisfy the microphone performance test requirement (especially of making an uproar product of falling) that requires height to low frequency (20-100 Hz), compensate the defect of the serious decay of low frequency of traditional emulation mouth below 100Hz simultaneously.

[ description of the drawings ]

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

FIG. 1 is a schematic diagram of an electroacoustic test simulation nozzle according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an electroacoustic test simulation nozzle according to an embodiment of the present application;

FIG. 3 is an exploded view of an electro-acoustic test simulation nozzle according to an embodiment of the present application;

FIG. 4 is an exploded view of an electro-acoustic test simulation nozzle in an embodiment of the present application;

FIG. 5 is a schematic diagram of a response curve of a conventional electro-acoustic testing simulation mouth;

fig. 6 is a schematic diagram of the response curve of an electro-acoustic test simulation mouth in an embodiment of the present application.

[ detailed description ] embodiments

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the terms are used for distinguishing only when they do express the ordinal order in context.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In one embodiment, an electro-acoustic testing simulator nozzle, as shown in fig. 1-6, includes a test frame 1, a speaker assembly 2, and a skin assembly 3. A support cavity 11 is arranged in the test support 1, an assembling port communicated with the support cavity 11 is arranged at one end of the test support, and a sound outlet hole 12 communicated with the support cavity 11 is arranged at the other end of the test support; the horn assembly 2 is arranged in the bracket cavity 11 and used for converting an electric signal into a sound signal; leather external member 3 is located between test support 1 and loudspeaker subassembly 2, form pressure field chamber 4 jointly between test support 1, loudspeaker subassembly 2 and the leather external member 3, sound signal sends from play sound hole 12 after passing through pressure field chamber 4. During the use, send an electrical signal by the electroacoustic analysis appearance system earlier, pass to the loudspeaker subassembly after power amplifier amplifies, the loudspeaker subassembly sends from going out the sound hole and is picked up by the microphone behind the pressure field chamber with the sound signal that electrical signal conversion becomes, the sound signal that the microphone picked up converts the electrical signal and passes through power amplifier and reach the electroacoustic analysis appearance system again and analyze, this application loudspeaker subassembly sends the sound signal that electrical signal conversion becomes directly by the microphone pickup after the sound hole sends from going out the sound hole behind the better pressure field chamber of leakproofness, because sound signal has extremely strong directionality when propagating in the pressure field chamber, make sound signal from sending to the distance of receiving by the microphone short, thereby reduce the decay of low frequency, reduce the distortion, promote the test effect of emulation mouth, and the acoustic pressure distribution in the pressure field chamber is even, realize improving the emulation mouth low frequency extensibility, the frequency response characteristic is better, reduce the effect of distortion. The application is a simulated mouth specially designed for 20-100Hz, the characteristics of the patent simulated mouth are as shown in figure 6, the low frequency is much lower than 200Hz, the problem of bearing power does not exist during calibration, and the frequency response characteristic of the section of 20-100Hz can be easily calibrated. Therefore, parameters such as frequency response, phase, distortion and the like of the noise reduction microphone in the frequency band of 20-100Hz can be easily tested.

Specifically, the horn assembly 2 includes an outer case 21, a horn 22, a face cover 23, and a connection terminal 24. A shell cavity 211 is arranged in the shell body 21, and an assembling port is arranged at one end of the shell body; the horn 22 is arranged in the shell cavity 211; the face cover body 23 is connected with one end of an assembly opening of the outer shell 21, and forms the outer shell cavity 211 together with the outer shell 21, and the face cover body 23 is provided with a first through hole 231 arranged opposite to the horn body 22 and a second through hole 232 communicating the outer shell cavity 211 and the pressure field cavity 4; one end of the connecting terminal 24 is connected with the horn 22, and the other end extends out of the outer shell 21. The electric signal is transmitted to the speaker 22 through the connection terminal 24, and the speaker 22 emits the sound signal, and the sound signal can be emitted from the first through hole 231 and the second through hole 232 into the pressure field cavity, and then emitted from the sound emitting hole after passing through the pressure field cavity, and is picked up by the microphone arranged on the sound emitting hole.

More specifically, the speaker assembly 2 further includes a tuning net 25 disposed on the cover 23, and the tuning net 25 covers the second through hole 232. The tone of the sound signal can be improved.

Further, a detachable connection mechanism 5 for detachably connecting the outer shell 21 and the face cover body 23 is arranged between the outer shell 21 and the face cover body 23. Is convenient to detach, maintain and replace.

Specifically, the detachable connection mechanism 5 includes a plurality of hooks 51 disposed at the lower end of the cover 23, and a slot 52 disposed on the inner wall of the outer casing 21 and engaged with the hooks 51. More specifically, a plurality of the hooks 51 are disposed at equal intervals along the circumferential direction of the surface cover 23. The surface cover body 23 and the outer shell body 21 are connected stably and compactly, and the disassembly is simple and convenient.

Further, the electroacoustic test simulation mouth further comprises a test frame base 6 which is connected with one end of the assembling port of the test support 1 and forms the support cavity 11 together with the test support 1.

Still further, be equipped with on the shell body 21 and be used for supplying the yielding through-hole 212 that connecting terminal 24 passed, be equipped with on the test support 1 lateral wall and be used for supplying connecting terminal 24 to pass support logical groove 13.

Specifically, the support through groove 13 is a kidney-shaped through groove, and the support through groove 13 is arranged at equal intervals along the circumferential direction of the test support 1.

In addition, be equipped with a plurality of shell through-holes 213 on the shell body 21 lateral wall, it is a plurality of shell through-hole 213 sets up along shell body 21 circumferencial direction equidistance interval.

The above description is provided for one embodiment of the present invention, and the embodiments of the present invention are not limited to these descriptions, and the present invention is not limited to the above nomenclature and the English nomenclature since the trade nomenclature is different. All with the utility model discloses a method, structure etc. are similar, the same, or to the utility model discloses make a plurality of technological deductions or replacement under the design prerequisite, all should regard as the utility model discloses a protection scope.

Claims

1. An electro-acoustic testing simulation mouth, comprising:

the test device comprises a test bracket (1), a bracket cavity (11) is arranged in the test bracket, an assembling port communicated with the bracket cavity (11) is arranged at one end of the test bracket, and a sound outlet hole (12) communicated with the bracket cavity (11) is arranged at the other end of the test bracket;

the loudspeaker assembly (2) is arranged in the bracket cavity (11) and is used for converting the electric signal into a sound signal;

the leather sleeve piece (3) is arranged between the test bracket (1) and the loudspeaker component (2);

test support (1), loudspeaker subassembly (2) and leather external member (3) between form pressure field chamber (4) jointly, sound signal sends from sound hole (12) after through pressure field chamber (4).

2. Electro-acoustic testing dummy nozzle according to claim 1, characterized in that the horn assembly (2) comprises:

a shell body (21) which is internally provided with a shell cavity (211) and one end of which is provided with an assembling port;

a horn (22) disposed within the housing cavity (211);

the face cover body (23) is connected with one end of an assembling opening of the shell body (21) and forms the shell cavity (211) together with the shell body (21), and a first through hole (231) opposite to the loudspeaker body (22) and a second through hole (232) for communicating the shell cavity (211) with the pressure field cavity (4) are formed in the face cover body (23);

and a connection terminal (24) having one end connected to the horn (22) and the other end extending out of the outer case (21).

3. The electro-acoustic testing simulator nozzle according to claim 2, wherein said speaker assembly (2) further comprises a tuning net (25) disposed on the cover (23), said tuning net (25) covering the second through hole (232).

4. The electro-acoustic testing simulator mouth according to claim 2, wherein a detachable connection mechanism (5) for detachably connecting the outer shell (21) and the face cover (23) is arranged between the outer shell (21) and the face cover (23).

5. The electro-acoustic test simulation mouth as claimed in claim 4, wherein the detachable connection mechanism (5) comprises a plurality of hooks (51) arranged at the lower end of the face cover body (23), and a slot (52) arranged on the inner wall of the outer shell (21) and engaged with the hooks (51).

6. The electro-acoustic testing simulator nozzle as defined in claim 5, wherein a plurality of said hooks (51) are arranged at equal intervals along the circumferential direction of said face cover (23).

7. Electro-acoustic testing simulator mouth according to claim 1, further comprising a test frame base (6) connected to one end of the assembly opening of the test frame (1) and forming together with the test frame (1) said frame chamber (11).

8. An electro-acoustic testing simulation mouth as claimed in claim 2, wherein the outer shell (21) is provided with a yielding through hole (212) for the connection terminal (24) to pass through, and the side wall of the testing support (1) is provided with a support through groove (13) for the connection terminal (24) to pass through.

9. The electro-acoustic test emulation mouth as claimed in claim 8, wherein said cradle through slots (13) are kidney-shaped through slots, and a plurality of said cradle through slots (13) are equally spaced along the circumferential direction of the test cradle (1).

10. The electro-acoustic testing simulator nozzle according to claim 2, wherein said outer casing (21) has a plurality of outer casing through holes (213) formed in a sidewall thereof, said plurality of outer casing through holes (213) being equidistantly spaced along a circumferential direction of said outer casing (21).