CN107979802A - A kind of point sound source device for microphone phased array Performance Evaluation - Google Patents
A kind of point sound source device for microphone phased array Performance Evaluation Download PDFInfo
- Publication number
- CN107979802A CN107979802A CN201711233794.6A CN201711233794A CN107979802A CN 107979802 A CN107979802 A CN 107979802A CN 201711233794 A CN201711233794 A CN 201711233794A CN 107979802 A CN107979802 A CN 107979802A
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- CN
- China
- Prior art keywords
- sound source
- source device
- sound insulation
- insulation conduit
- sound
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention belongs to noise testing technical field, is related to a kind of point sound source device for microphone phased array Performance Evaluation.It is characterized in that：It includes loudspeaker (1), rubber seal (2), connection bolt (3) and sound insulation conduit (4).The present invention proposes a kind of point sound source device, reduces sound source volume, improves directive property, expands frequency range, meets requirement of the microphone phased array Performance Evaluation to point sound source.
Description
Technical field
The invention belongs to noise testing technical field, is related to a kind of point sound source for microphone phased array Performance Evaluation
Device.
Background technology
Noise source location technology based on microphone phased array is to realize the primary hand of noise source positioning and identification at present
Section.The main performance indicator of microphone phased array includes dynamic range, 3dB beamwidths, spatial confusion etc..These performance parameters are equal
For the function of frequency, i.e., when same set of microphone phased array positions the noise of different frequency, its locating effect exists
Difference.In addition, when various forms of arrays position the noise source of same frequency, locating effect is also different.Therefore, it is
The performance of evaluation microphone phased array using the point sound source with good directive property, it is necessary to carry out positioning measurement, so as to obtain
Microphone phased array to parameters such as the dynamic range of different frequency auditory localization, 3dB beamwidths.Current sound source volume is big,
Directive property is poor, frequency range is narrow, it is impossible to meets requirement of the microphone phased array Performance Evaluation to point sound source.
The content of the invention
The purpose of the present invention is：A kind of point sound source device for microphone phased array Performance Evaluation is proposed, to contract
Small sound source volume, improves directive property, expands frequency range, meets requirement of the microphone phased array Performance Evaluation to point sound source.
The technical scheme is that：A kind of point sound source device for microphone phased array Performance Evaluation, its feature
It is：It includes loudspeaker 1, rubber seal 2, connection bolt 3 and sound insulation conduit 4；Sound insulation conduit 4 has funnel shaped, it
The pipe section of heavy caliber section and the right including the left side, the diameter of heavy caliber section, which is progressively restrained, is transitioned into pipe section, is led in sound insulation
The left port of pipe 4 has sound insulation conduit flange, by connecting bolt 3 by sound insulation conduit flange and loudspeaker flanged joint to be overall,
Rubber seal 2 is between sound insulation conduit flange and loudspeaker flange；The side wall of sound insulation conduit 4 is double-decker, bilayer knot
Cavity between structure is vacuum chamber 5, and the right output port of sound insulation conduit 4 is sound penetrating hole 7.
It is an advantage of the invention that：A kind of point sound source device for microphone phased array Performance Evaluation is proposed, is reduced
Sound source volume, improves directive property, expands frequency range, meet microphone phased array Performance Evaluation to point sound source
It is required that.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Embodiment
The present invention is described in further details below.It is a kind of for microphone phased array Performance Evaluation referring to Fig. 1
Point sound source device, it is characterised in that：It includes loudspeaker 1, rubber seal 2, connection bolt 3 and sound insulation conduit 4；Insulate against sound conduit
4 have funnel shaped, it includes the heavy caliber section on the left side and the pipe section on the right, and the diameter of heavy caliber section, which is progressively restrained, to be transitioned into
Pipe section, has sound insulation conduit flange in the left port of sound insulation conduit 4, will sound insulation conduit flange and loudspeaker by connecting bolt 3
Flanged joint is overall, and rubber seal 2 is between sound insulation conduit flange and loudspeaker flange；Sound insulation conduit 4 side wall be
Double-decker, the cavity between double-decker is vacuum chamber 5, and the right output port of sound insulation conduit 4 is sound penetrating hole 7.
In order to further improve directive property, the internal diameter of described sound insulation conduit (4) the pipe section is 4mm~10mm；Insulating against sound
The outside of conduit 4 is coated with acoustic foam layer 6, and the thickness of acoustic foam layer 6 is 5mm~20mm.The vacuum of the vacuum chamber 5
Spend for 100Pa~1000Pa.
The present invention is based on piston acoustic source principle, and sound wave is produced by using loudspeaker, and along sound insulation conduit outflow, through entrant sound
Hole radiates to form point sound source, has the characteristics that sound source is small, directive property is good, wide frequency range, suitable for microphone phase battle array
Row Performance Evaluation.Sonic source device of the present invention is made of loudspeaker, rubber seal, sound insulation conduit, acoustic foam etc..Loudspeaker is adopted
With small size tweeter, the sound wave for testing required different frequency is produced.Loudspeaker is connected with sound insulation conduit by bolt,
And the sealing of junction is realized using rubber seal.The sound wave that loudspeaker produces is along sound insulation ducted propagation, finally through sound penetrating hole
Outflow, the radiative acoustic wave in the form of point sound source.In order to improve the oise insulation factor of sound insulation conduit, using the form of double-layer vacuum pumping, i.e.,
Vacuumized among two layers of tube wall, oise insulation factor is significantly provided, lower influence of the tube wall transmitted acoustic pulse to point sound source sound field.In order to drop
Influence of the low tube wall surface sound reflecting to point sound source sound field, is carried out coated using acoustic foam.
Embodiment, one embodiment of the present of invention, loudspeaker are finished parts, and the internal diameter of the heavy caliber section for the conduit that insulates against sound is
68mm, the length of heavy caliber section is 40mm；Internal diameter is reduced into 8mm, the length of transition by heavy caliber section by a transition
For 50mm；Small-bore section of a diameter of 8mm, length 200mm.Sound insulation conduit is double-decker, and internal layer thickness is 4mm, outer layer
Thickness is 1mm, and the cavity thickness between double-decker is 2mm, vacuum 100Pa.The coated sound absorption in outer surface of sound insulation conduit
Foam, depth of foam 5mm.
Claims (9)
- A kind of 1. point sound source device for microphone phased array Performance Evaluation, it is characterised in that：It include loudspeaker (1), Rubber seal (2), connection bolt (3) and sound insulation conduit (4)；Sound insulation conduit (4) has funnel shaped, it includes the big of the left side Bore section and the pipe section on the right, the diameter of heavy caliber section, which is progressively restrained, is transitioned into pipe section, in the left port of sound insulation conduit (4) There is sound insulation conduit flange, be overall, rubber seal with loudspeaker flanged joint by connecting bolt (3) by sound insulation conduit flange (2) between sound insulation conduit flange and loudspeaker flange；The side wall of sound insulation conduit (4) is double-decker, between double-decker Cavity be vacuum chamber (5), sound insulation conduit (4) right output port be sound penetrating hole (7).
- 2. point sound source device according to claim 1, it is characterised in that：The internal diameter of described sound insulation conduit (4) the pipe section For 4mm~10mm.
- 3. point sound source device according to claim 1 or 2, it is characterised in that：Suction is coated with outside sound insulation conduit (4) Sound froth bed (6).
- 4. point sound source device according to claim 3, it is characterised in that：Sound absorption is coated with outside sound insulation conduit (4) Froth bed (6).
- 5. according to the point sound source device described in claim 1,2 or 4, it is characterised in that：The vacuum of the vacuum chamber (5) is 100Pa~1000Pa.
- 6. point sound source device according to claim 3, it is characterised in that：The vacuum of the vacuum chamber (5) is 100Pa ~1000Pa.
- 7. according to claim 1,2,4 or the point sound source device, it is characterised in that：The thickness of the acoustic foam layer (6) Spend for 10mm~30mm.
- 8. point sound source device according to claim 3, it is characterised in that：The thickness of the acoustic foam layer (6) is 10mm~30mm.
- 9. point sound source device according to claim 5, it is characterised in that：The thickness of the acoustic foam layer (6) is 10mm~30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233794.6A CN107979802A (en) | 2017-11-29 | 2017-11-29 | A kind of point sound source device for microphone phased array Performance Evaluation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233794.6A CN107979802A (en) | 2017-11-29 | 2017-11-29 | A kind of point sound source device for microphone phased array Performance Evaluation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107979802A true CN107979802A (en) | 2018-05-01 |
Family
ID=62008440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711233794.6A Pending CN107979802A (en) | 2017-11-29 | 2017-11-29 | A kind of point sound source device for microphone phased array Performance Evaluation |
Country Status (1)
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| CN (1) | CN107979802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781557A (en) * | 2020-05-12 | 2020-10-16 | 杭州兆华电子有限公司 | Acoustic camera positioning error correction method based on point sound source |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651920A (en) * | 2009-06-19 | 2010-02-17 | 瑞声声学科技(深圳)有限公司 | Microphone distortion test system |
| CN201858439U (en) * | 2010-11-25 | 2011-06-08 | 新疆通利塑业有限公司 | Soundproof plastic pipe |
| CN102175465A (en) * | 2011-02-16 | 2011-09-07 | 芜湖恒耀汽车零部件有限公司 | Sound source used for testing transfer function of exhaust system of vehicle |
| CN204437562U (en) * | 2014-12-18 | 2015-07-01 | 蔡俊龙 | A kind of drainage pipeline sound insulation sticking structure |
| CN204482015U (en) * | 2015-01-22 | 2015-07-15 | 邹士磊 | The anti-type speaker system of high radiation |
-
2017
- 2017-11-29 CN CN201711233794.6A patent/CN107979802A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651920A (en) * | 2009-06-19 | 2010-02-17 | 瑞声声学科技(深圳)有限公司 | Microphone distortion test system |
| CN201858439U (en) * | 2010-11-25 | 2011-06-08 | 新疆通利塑业有限公司 | Soundproof plastic pipe |
| CN102175465A (en) * | 2011-02-16 | 2011-09-07 | 芜湖恒耀汽车零部件有限公司 | Sound source used for testing transfer function of exhaust system of vehicle |
| CN204437562U (en) * | 2014-12-18 | 2015-07-01 | 蔡俊龙 | A kind of drainage pipeline sound insulation sticking structure |
| CN204482015U (en) * | 2015-01-22 | 2015-07-15 | 邹士磊 | The anti-type speaker system of high radiation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781557A (en) * | 2020-05-12 | 2020-10-16 | 杭州兆华电子有限公司 | Acoustic camera positioning error correction method based on point sound source |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180501 |