CN204014064U - A kind of Sound Attenuator - Google Patents
A kind of Sound Attenuator Download PDFInfo
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- CN204014064U CN204014064U CN201420352303.5U CN201420352303U CN204014064U CN 204014064 U CN204014064 U CN 204014064U CN 201420352303 U CN201420352303 U CN 201420352303U CN 204014064 U CN204014064 U CN 204014064U
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- sound attenuator
- attenuator
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Abstract
The utility model discloses a kind of Sound Attenuator, described Sound Attenuator is frustum type structure, can, in Sound Attenuator size be not very large in the situation that, realize the required distance of free field test.This Sound Attenuator comprises the audio amplifier that is used to product to be tested that test audio signal is provided, for adjusting the frequency response curve of sound field, make sound field meet in IEC60268-4 the first acoustical cotton about the specification requirement of free field, for absorbing sound, eliminate the second acoustical cotton of the reflection of sound on Sound Attenuator inwall and for absorbing sound and eliminating sound field from the wedge of the sound reflection of Sound Attenuator bottom, can well meeting the test request that microphone products is produced the various performance index of line free field.
Description
Technical field
The utility model relates to electronic product technical field of measurement and test, particularly a kind of Sound Attenuator.
Background technology
Along with electronic product is more and more higher to the performance requirement of microphone spare and accessory parts, microphone products production line test performance requirement is also more and more higher, and produce the severe acoustic enviroment of line, has restricted the requirement of microphone products acoustical behavior.
At present, microphone is to build to produce line Sound Attenuator or semi-anechoic room in the method for producing line and realize free field test, and Sound Attenuator and semi-anechoic room's volume and weight are large, cost and maintenance cost is higher and need to be equipped with professional test personnel carries out operation and maintenance.
Utility model content
A kind of Sound Attenuator that the utility model provides, to solve existing product line Sound Attenuator or semi-anechoic room's volume and weight is large, cost is high problem.
For achieving the above object, the utility model embodiment has adopted following technical scheme:
The utility model embodiment provides a kind of Sound Attenuator, and described Sound Attenuator is frustum type structure, comprising:
Audio amplifier, is arranged on the top of Sound Attenuator, is used to product to be tested that test audio signal is provided;
The first acoustical cotton, closely abuts in audio amplifier surface, for adjusting the frequency response curve of sound field, makes sound field meet in IEC60268-4 the specification requirement about free field;
The second acoustical cotton, paving, on whole Sound Attenuator inwall, for sound absorption, is eliminated the reflection of sound on Sound Attenuator inwall;
Wedge, is arranged on the bottom of Sound Attenuator, for sound absorption, eliminates in sound field the sound reflection from Sound Attenuator bottom.
There is horizontal-shift and vertical shift in the center that further, in described audio amplifier, the center of loudspeaker is described audio amplifier.
In described the first acoustical cotton, dig out a frustum type hollow cavity, the loudspeaker of described audio amplifier are exposed in described frustum type hollow cavity bottom.
Further, the distance B between described Sound Attenuator top width A, bottom width C and top and bottom meets the ratio that A:B:C is 9:20:32.
Described Sound Attenuator is for realizing the testing requirement of microphone free field ultimate range 50cm.
The beneficial effect of the utility model embodiment is: the utility model embodiment provides a kind of Sound Attenuator, and this Sound Attenuator is frustum type structure, can, in Sound Attenuator size be not very large in the situation that, realize the required distance of free field test; In addition by comprising the audio amplifier that is used to product to be tested that test audio signal is provided, for adjusting the frequency response curve of sound field, make sound field meet in IEC60268-4 the first acoustical cotton about the specification requirement of free field, for absorbing sound, eliminate the second acoustical cotton of the reflection of sound on Sound Attenuator inwall and for absorbing sound and eliminating sound field from the wedge of the sound reflection of Sound Attenuator bottom, can well meeting the test request that microphone produces the various performance index of line free field.
Accompanying drawing explanation
A kind of Sound Attenuator internal structure schematic diagram that Fig. 1 provides for the present embodiment;
The outer schematic perspective view of audio amplifier that Fig. 2-a provides for the present embodiment;
The audio amplifier vertical view that Fig. 2-b provides for the present embodiment;
The schematic perspective view of the first acoustical cotton that Fig. 3-a provides for the present embodiment;
The vertical view of the first acoustical cotton that Fig. 3-b provides for this enforcement;
The profile of the first acoustical cotton that Fig. 3-c provides for the present embodiment;
A kind of Sound Attenuator schematic perspective view that Fig. 4 provides for the present embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
Referring to Fig. 1, be a kind of whistle box structure schematic diagram that the utility model embodiment provides, described Sound Attenuator is frustum type structure, comprising:
Audio amplifier 100, is arranged on the top 108 of Sound Attenuator, is used to product to be tested that test audio signal is provided.
Concrete, as shown in Fig. 2-a and Fig. 2-b, in described audio amplifier 100 there is horizontal-shift and vertical shift in the center of loudspeaker 20 and the center of described audio amplifier 100.
In the vertical view of Fig. 2-b, the center line 23 of audio amplifier 100 is in its surface corresponding to central point 21, and the center line 24 of loudspeaker 20 is corresponding to central point 22 on audio amplifier 100 surfaces, and described central point 21 exists horizontal-shift and vertical shift with described central point 22.
The first acoustical cotton 101, closely abuts in audio amplifier 100 surfaces, for adjusting the frequency response curve of sound field, makes sound field meet in IEC60268-4 the specification requirement about free field.
Concrete, as shown in Fig. 3-a, Fig. 3-b and Fig. 3-c, in described the first acoustical cotton 101, digging out a frustum type hollow cavity 30, the loudspeaker 20 of described audio amplifier are exposed in described frustum type hollow cavity 30 bottoms 31.
It should be noted that, in actual design process, bottom 31 and the top 32 of described frustum type hollow cavity 30 is square, bottom 31 length of sides of described frustum type hollow cavity 30 are R2, R2 equals the diameter of described loudspeaker 20, makes loudspeaker 20 be inscribed within the bottom 31 of frustum type hollow cavity 30, and described frustum type hollow cavity 30 top 32 length of sides are R1, R1 is divided equally by the center line 33 of described the first acoustical cotton 101, and R1>R2.
The second acoustical cotton 102, paving, on whole Sound Attenuator inwall 104, for sound absorption, is eliminated the reflection of sound on Sound Attenuator inwall 104.
Wedge 14, is arranged on the bottom 109 of Sound Attenuator, for sound absorption, eliminates in sound field the sound reflection from Sound Attenuator bottom 109.
Concrete, described wedge is flat-top wedge.
Beam 105, is arranged on the bottom of Sound Attenuator shell 106, for the damping of whole Sound Attenuator.
Mobile pulley 107, is arranged on the bottom of Sound Attenuator shell 106, for mobile Sound Attenuator.
It should be noted that, the center line 23 of described audio amplifier overlaps mutually with axial line 110 3 lines of the center line 33 of described the first acoustical cotton and described Sound Attenuator.
Further, when practical application, as shown in Figure 4, a kind of Sound Attenuator schematic perspective view providing for the present embodiment.Distance B between described Sound Attenuator top 108 width A, bottom 109 width C and 108Yu bottom, top 109 meets the ratio that A:B:C is 9:20:32.
It should be noted that, described Sound Attenuator can be realized the testing requirement of microphone free field ultimate range 50cm.And, can produce for realizing microphone products sensitivity, frequency response, phase place, directive property, the total harmonic distortion THD of line free field, the test of signal to noise ratio snr performance index.
In sum, the utility model discloses a kind of Sound Attenuator, this Sound Attenuator is frustum type structure, can, in Sound Attenuator size be not very large in the situation that, realize the required distance of free field test; In addition by comprising the audio amplifier that is used to product to be tested that test audio signal is provided, for adjusting the frequency response curve of sound field, make sound field meet in IEC60268-4 the first acoustical cotton about the specification requirement of free field, for absorbing sound, eliminate the second acoustical cotton of the reflection of sound on Sound Attenuator inwall and for absorbing sound and eliminating sound field from the wedge of the sound reflection of Sound Attenuator bottom, can well meeting the test request that microphone products is produced the various performance index of line free field.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection range of the present utility model.All any modifications of doing, be equal to replacement, improvement etc. within spirit of the present utility model and principle, be all included in protection range of the present utility model.
Claims (10)
1. a Sound Attenuator, is characterized in that, described Sound Attenuator is frustum type structure, comprising:
Audio amplifier, is arranged on the top of Sound Attenuator, is used to product to be tested that test audio signal is provided;
The first acoustical cotton, closely abuts in audio amplifier surface, for adjusting the frequency response curve of sound field, makes sound field meet in IEC60268-4 the specification requirement about free field;
The second acoustical cotton, paving, on whole Sound Attenuator inwall, for sound absorption, is eliminated the reflection of sound on Sound Attenuator inwall;
Wedge, is arranged on the bottom of Sound Attenuator, for sound absorption, eliminates in sound field the sound reflection from Sound Attenuator bottom.
2. Sound Attenuator according to claim 1, is characterized in that, in described audio amplifier, the center of loudspeaker and the center of described audio amplifier exist horizontal-shift and vertical shift.
3. Sound Attenuator according to claim 2, is characterized in that, digs out a frustum type hollow cavity in described the first acoustical cotton, and the loudspeaker of described audio amplifier are exposed in described frustum type hollow cavity bottom.
4. Sound Attenuator according to claim 1, is characterized in that, the center line of described audio amplifier overlaps mutually with the center line of described the first acoustical cotton and the axial line of described Sound Attenuator three lines.
5. Sound Attenuator according to claim 1, is characterized in that, described wedge is flat-top wedge.
6. Sound Attenuator according to claim 1, is characterized in that, described Sound Attenuator also comprises beam, is arranged on the bottom of Sound Attenuator shell, for the damping of whole Sound Attenuator.
7. Sound Attenuator according to claim 1, is characterized in that, described Sound Attenuator also comprises mobile pulley, is arranged on the bottom of Sound Attenuator shell, for mobile Sound Attenuator.
8. according to the Sound Attenuator described in claim 1-7 any one, it is characterized in that, the distance B between described Sound Attenuator top width A, bottom width C and top and bottom meets the ratio that A:B:C is 9:20:32.
9. Sound Attenuator according to claim 8, is characterized in that, described Sound Attenuator is for realizing the testing requirement of microphone free field ultimate range 50cm.
10. Sound Attenuator according to claim 8, is characterized in that, described Sound Attenuator is used for realizing the test that microphone products is produced the sensitivity of line free field, frequency response, phase place, directive property, total harmonic distortion THD, signal to noise ratio snr performance index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352303.5U CN204014064U (en) | 2014-06-28 | 2014-06-28 | A kind of Sound Attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352303.5U CN204014064U (en) | 2014-06-28 | 2014-06-28 | A kind of Sound Attenuator |
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| Publication Number | Publication Date |
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| CN204014064U true CN204014064U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420352303.5U Active CN204014064U (en) | 2014-06-28 | 2014-06-28 | A kind of Sound Attenuator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053113A (en) * | 2014-06-28 | 2014-09-17 | 歌尔声学股份有限公司 | Sound reducing enclosure |
| CN112565979A (en) * | 2020-12-10 | 2021-03-26 | 国光电器股份有限公司 | Speaker frequency response numerical value calculation method and device, electronic equipment and storage medium |
-
2014
- 2014-06-28 CN CN201420352303.5U patent/CN204014064U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053113A (en) * | 2014-06-28 | 2014-09-17 | 歌尔声学股份有限公司 | Sound reducing enclosure |
| CN112565979A (en) * | 2020-12-10 | 2021-03-26 | 国光电器股份有限公司 | Speaker frequency response numerical value calculation method and device, electronic equipment and storage medium |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |