CN205844267U - A kind of sound scattering coefficient on-the-spot test microphone linear array - Google Patents
A kind of sound scattering coefficient on-the-spot test microphone linear array Download PDFInfo
- Publication number
- CN205844267U CN205844267U CN201620817808.3U CN201620817808U CN205844267U CN 205844267 U CN205844267 U CN 205844267U CN 201620817808 U CN201620817808 U CN 201620817808U CN 205844267 U CN205844267 U CN 205844267U
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- China
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- microphone
- scattering coefficient
- linear array
- sound scattering
- spot test
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Abstract
This utility model relates to microphone linear array, particularly to a kind of sound scattering coefficient on-the-spot test microphone linear array.Mainly solving existing sound scattering coefficient to measure test block material shape requires height, processing cutting is wasted time and energy, and the technical problem such as test period length.The technical solution of the utility model: a kind of sound scattering coefficient on-the-spot test microphone linear array, including U-shaped fixed support, rotatable A-frame is installed in U-shaped support bracket fastened one end, U-shaped support bracket fastened other end setting angle regulation disk, it is respectively arranged with connection support on A-frame and angular adjustment disk, connecting and fix microphone installing plate, microphone installing plate perforate on support, microphone is fixed on microphone installing plate by rubber bush.This utility model can be used for the Site Detection of the random incidence sound scattering coefficient of the sound diffuser in architectural acoustics field it can also be used to the on-the-spot test of random incidence sound scattering coefficient.
Description
Technical field
This utility model relates to microphone linear array, particularly to a kind of sound scattering coefficient on-the-spot test microphone linear array.
Can be used for the Site Detection of the random incidence sound scattering coefficient of sound diffuser in architectural acoustics field it can also be used to random incidence
The on-the-spot test of sound scattering coefficient.
Background technology
Sound scattering coefficient measurement is the most emerging Acoustic detection project, is mainly used to evaluate Interior Interface sound scattering special
Property.Existing standard method of testing is that reverberation chamber is measured, and Fig. 1 is that equidimension model sound scattering coefficient tests schematic diagram, specific practice
It is that test specimen processing is cut into square or circular (area about 10 square metres), and test block 1 is placed in rotary round table 2.
Promoting round platform to rotate an angle, generally 5 to 10 degree, until having turned a circle, testing and recording corresponding sound field impulse response,
Then can get one group of sound field pulse respond, carry out this group sound field impulse response synchronizing after superposition and processing, just can obtain
Sound scattering coefficient to test specimen.Existing random incidence sound scattering coefficient is measured as laboratory measurement, there is following several respects shortcoming:
(1) material shape requiring height, processing cutting is wasted time and energy；(2) needing specialized laboratory, test period is long, and cost is high.
Summary of the invention
The purpose of this utility model is to provide a kind of sound scattering coefficient on-the-spot test microphone linear array, mainly solves existing
Sound scattering coefficient is measured and test block material shape is required height, and processing cutting is wasted time and energy, and the technical problem such as test period length.
The technical solution of the utility model: a kind of sound scattering coefficient on-the-spot test microphone linear array, including U-shaped fixing
Frame, the rotatable A-frame of U-shaped support bracket fastened one end installation, U-shaped support bracket fastened other end setting angle regulation disk, three
It is respectively arranged with connection support on angle support and angular adjustment disk, connects and fix microphone installing plate, microphone installing plate on support
Perforate, microphone is fixed on microphone installing plate by rubber bush.Whole microphone linear array is straight by 13 microphones
Line Unequal distance is arranged to make up, between microphone spacing be followed successively by 10 cm, 5 cm, 5 cm, 5 cm, 2.5 cm, 2.5 cm, 2.5
cm、2.5 cm、5 cm、5 cm、5 cm、10 cm.Scale, each scale interval 10 degree it is carved with on described angular adjustment disk.
Rubber bush and microphone interference fit.
The beneficial effects of the utility model: this utility model device, based on in-site measurement, utilizes the sensing of microphone linear array
Property characteristic, defines the space filtering to sound field, reduces the requirement to signal to noise ratio, directly obtain the energy of direct reflection sound wave
Amount, thus obtains sound scattering coefficient.This structure is measured for sound scattering coefficient, can carry out in-site measurement.There is measurement simplicity,
Acoustic enviroment is required the advantages such as low.Additionally, this device to material shape without particular/special requirement, reduce measurement cost.
Accompanying drawing explanation
Fig. 1 is that equidimension model sound scattering coefficient tests schematic diagram.
Fig. 2 is this utility model structural representation.
Fig. 3 is this utility model microphone mounting structure schematic diagram.
Fig. 4 is this utility model microphone mounting plates structure schematic diagram.
Fig. 5 is mike cord array directionality schematic diagram.
In figure: 1-test block, 2-rotary round table, 3-U type fixed support, 4-A-frame, 5-angular adjustment disk, 6-is even
Connect support, 7-microphone installing plate, 8-microphone, 9-rubber bush.
Detailed description of the invention
With reference to Fig. 2,3,4, a kind of sound scattering coefficient on-the-spot test microphone linear array, including U-shaped fixed support 3, U-shaped solid
Rotatable A-frame 4, U-shaped support bracket fastened other end setting angle regulation disk 5, A-frame are installed in one end of fixed rack
Connect support 6 with being respectively arranged with on angular adjustment disk, connect and on support, fix microphone installing plate 7, microphone installing plate perforate,
Microphone 8 is fixed on microphone installing plate by rubber bush 9, rubber bush 9 and microphone 8 interference fit.Whole
Microphone linear array is arranged to make up by 13 microphone straight line Unequal distance, between microphone spacing be followed successively by 10 cm, 5 cm, 5 cm,
5 cm、2.5 cm、2.5 cm、2.5 cm、2.5 cm、5 cm、5 cm、5 cm、10 cm.Carve on described angular adjustment disk 5
There are scale, each scale interval 10 degree.
During measurement, the linear array directivity pattern (microphone spacing is 2.5cm) of 5 microphone compositions, in conjunction with above-mentioned directivity
Feature, adjusts the receiving angle of antenna during measurement, linear array is parallel to direct reflection sound wave direction, to the time domain impulse letter received
Number integration, just can get the energy of direct reflection ripple, thus can directly obtain the energy of scattered sound waves, such as Fig. 5.To some discrete
After angle carry out above-mentioned measurement, just can get the sound scattering coefficient of material.
Claims (4)
1. a sound scattering coefficient on-the-spot test microphone linear array, is characterized in that including U-shaped fixed support, U-shaped fixed support
One end rotatable A-frame is installed, U-shaped support bracket fastened other end setting angle regulation disk, A-frame and angle are adjusted
Being respectively arranged with connection support on pitch circle dish, connect and fix microphone installing plate on support, microphone installing plate perforate, microphone passes through
Rubber bush is fixed on microphone installing plate.
A kind of sound scattering coefficient on-the-spot test microphone linear array the most according to claim 1, is characterized in that mike cord
Battle array be arranged to make up by 13 microphone straight line Unequal distance, between microphone spacing be followed successively by 10 cm, 5 cm, 5 cm, 5 cm, 2.5
cm、2.5 cm、2.5 cm、2.5 cm、5 cm、5 cm、5 cm、10 cm。
A kind of sound scattering coefficient on-the-spot test microphone linear array the most according to claim 1, is characterized in that described angle
It is carved with scale, each scale interval 10 degree on degree regulation disk.
A kind of sound scattering coefficient on-the-spot test microphone linear array the most according to claim 1, is characterized in that described rubber
Rubber sleeve and microphone interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620817808.3U CN205844267U (en) | 2016-08-01 | 2016-08-01 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620817808.3U CN205844267U (en) | 2016-08-01 | 2016-08-01 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844267U true CN205844267U (en) | 2016-12-28 |
Family
ID=57641894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620817808.3U Withdrawn - After Issue CN205844267U (en) | 2016-08-01 | 2016-08-01 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205844267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124627A (en) * | 2016-08-01 | 2016-11-16 | 上海市计量测试技术研究院 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
-
2016
- 2016-08-01 CN CN201620817808.3U patent/CN205844267U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124627A (en) * | 2016-08-01 | 2016-11-16 | 上海市计量测试技术研究院 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
| CN106124627B (en) * | 2016-08-01 | 2019-03-19 | 上海市计量测试技术研究院 | A kind of sound scattering coefficient on-the-spot test microphone linear array |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20190319 |