CN100523745C - Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition - Google Patents
Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition Download PDFInfo
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- CN100523745C CN100523745C CNB2007101718194A CN200710171819A CN100523745C CN 100523745 C CN100523745 C CN 100523745C CN B2007101718194 A CNB2007101718194 A CN B2007101718194A CN 200710171819 A CN200710171819 A CN 200710171819A CN 100523745 C CN100523745 C CN 100523745C
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- sound
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- noise measurement
- absorption sponge
- identification
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Abstract
The invention belongs to the technical field of acoustics and provides a sound insulation and noise elimination tube for in-site noise measurement and identification. The invention consists of an elastic connecting section, a sound absorption sponge, a wall plate, a sound absorption sponge, a bottom microphone hole, a sealing film, a cavity and a bottom plate. The elastic connecting section, the wall plate and the bottom plate are interconnected to form the cavity; the internal wall of the cavity closely attaches to the sound absorption sponge; the bottom microphone hole is arranged in the middle of the bottom plate of a multi-layer aluminum plate damping light sound insulation structure; the elastic sealing film of the microphone hole is arranged on the external side of the bottom microphone hole. When in use, the invention can be closely attached to the surface of the measured noise source and the microphone extends into the middle part of the cavity through the microphone hole. The invention has simple structure, easy process and good sound insulation performance and is portable. The invention can effectively measure and identify the noise in the site with a plurality of noise sources.
Description
Technical field
The invention belongs to the acoustic technique field, be specifically related to a kind of acoustical insulation sound-deadening pipe that is used for on-site noise measurement and identification.
Background technology
Large-scale industrial enterprise noise source is numerous, it is wide to distribute, the sound level height, noise effect is bigger each other, common single microphone is directly measured and is difficult to the contribution of each noise source of identification under a lot of situations, can't provide reliable basis for control measures, and sound intensity technique can suppress the influence of ground unrest under certain condition, but apparatus expensive, and under the comparatively strong field condition of reverberation field, be difficult to effectively measure.
Summary of the invention
The objective of the invention is to propose the acoustical insulation sound-deadening pipe that a kind of portable, high sound insulation property, device simply are used for on-site noise measurement and identification.
The on-site noise measurement that the present invention proposes and the acoustical insulation sound-deadening pipe of identification, rounded or rectangular configuration, by elasticity linkage section 1, the first sound absorption sponge 2, wallboard 3, the second sound absorption sponge 4, microphone holes 5, diaphragm seal 6, cavity 7, base plate 8 is formed, its structure as shown in Figure 1, wherein, two elasticity linkage sections 1, two wallboards 3, two base plates 8 are connected to form cavity 7, cavity 7 open tops, elasticity linkage section 1 bottom is connected with wallboard 3 tops, wallboard 3 bottoms link to each other with base plate 8 one ends, the first sound absorption sponge 2 is close to elasticity linkage section 1, and be positioned at cavity 7, the second sound absorption sponges 4 and be close to wallboard 3 and base plate 8, and be positioned at cavity 1, microphone holes 5 is positioned at base plate 8 middle parts, and the outside of microphone holes 5 is provided with diaphragm seal 6.
Among the present invention, microphone holes 5 apertures are 1.5～2.5cm.
Among the present invention, the angle of elasticity linkage section 1 and surface level is 20 °～50 °.
Among the present invention, elasticity linkage section 1 length is 3～10cm.
Among the present invention, wallboard 3 adopts multilayer aluminium sheet damping light sound-insulation structure superposition to form, and wall 3 thickness are 3～10mm.
Among the present invention, base plate 8 adopts multilayer aluminium sheet damping light sound-insulation structure superposition to form, and base plate 8 thickness are 3～10mm.
Among the present invention, the first sound absorption sponge, 2 thickness are 1～3cm, and the second sound absorption sponge, 4 thickness are 1～5cm, and the width of cavity 7 is 10～30cm, and the height of cavity 7 is 10～30cm, and the width of diaphragm seal 6 is 3～5mm.
The present invention has superior sound insulation property, and the above frequency band sound insulation property of 250Hz surpasses 30dB, and the low frequency sound insulation property is 10～20dB, and the interference that can eliminate other noise source obtains reliable noise measurement result.The mouth of pipe adopts the elasticity linkage section, and interior subsides acoustic absorbant, and surface that can adaptive different shape is measured.Microphone is directly inserted in the acoustical insulation sound-deadening pipe by the bottom aperture, measures easy.Acoustical insulation sound-deadening case size is little, and is in light weight, but portable operation.
Use the present invention as long as it is close to the noise source surface that needs are measured, get final product.
Advantage of the present invention:
Device is simple, and thin type is light, and sound insulation property is good, processes easyly, with low cost, can carry out the in-site measurement and the identification of full range band effectively to many noise sources.For at the scene many noise sources effectively being measured respectively, the present invention proposes to adopt a small-sized enclosure to shield the influence of other noise source, only allows the noise radiation of noise source to be measured to this enclosure, is referred to as " acoustical insulation sound-deadening pipe mensuration ".
Acoustical insulation sound-deadening tube wall of the present invention adopts the multilayer light sound insulating structure, has superior sound insulation property, the above frequency band sound insulation property of 250Hz surpasses 30dB, and the low frequency sound insulation property is 10～20dB, and the interference that can eliminate other noise source obtains reliable noise measurement result.The mouth of pipe adopts the elasticity linkage section, and interior subsides acoustic absorbant, and surface that can adaptive different shape is measured.Microphone is directly inserted in the acoustical insulation sound-deadening pipe by the bottom aperture, measures easy.Acoustical insulation sound-deadening case size is little, and is in light weight, but portable operation.
Description of drawings
Fig. 1 is a sectional view of the present invention.
Number in the figure: 1 is the elasticity linkage section, and 2 is the first sound absorption sponge, and 3 is wallboard, and 4 is the second sound absorption sponge, and 5 is microphone holes, and 6 is diaphragm seal, and 7 is cavity, and 8 is base plate.
Embodiment
The embodiment that the invention is further illustrated by the following examples.
Embodiment 1: following each parts are connected by mode shown in Figure 1, and these those skilled in the art all can smooth implementation.Elasticity linkage section 1, the wallboard of being made up of multilayer aluminium sheet damping light sound-insulation structure 3, the base plate of being made up of multilayer aluminium sheet damping light sound-insulation structure 8 link to each other, form drum shape cavity 7, offer bottom microphone holes 5 at multilayer aluminium sheet damping light sound-insulation structure base plate 8 middle parts, and installation microphone holes elastic sealing strip 6, elasticity linkage section 1 shows and is close to the first sound absorption sponge 2 in cavity, is close to the second sound absorption sponge 4 on multilayer aluminium sheet damping light sound-insulation construction panels 3, multilayer aluminium sheet damping light sound-insulation structure base plate 8 surfaces.Elasticity linkage section 1 adopts the thick damping rubber felt of 2mm, length is 8cm, multilayer aluminium sheet damping light sound-insulation construction panels 3, multilayer aluminium sheet damping light sound-insulation structure base plate 8 all adopt the structure of the thick damping felt of the middle compound 3mm of the thick aluminium sheet of both sides 1mm, multilayer aluminium sheet damping light sound-insulation construction panels 3 length are 30cm, multilayer aluminium sheet damping light sound-insulation structure base plate 8 width are 25cm, cavity diameter 15cm, high 25cm.Microphone stretches into cavity 7 middle parts from bottom microphone holes 5 and measures.
Claims (7)
1, the acoustical insulation sound-deadening pipe of a kind of on-site noise measurement and identification, rounded or rectangular configuration, by elasticity linkage section (1), the first sound absorption sponge (2), wallboard (3), the second sound absorption sponge (4), microphone holes (5), diaphragm seal (6), cavity (7), base plate (8) is formed, it is characterized in that two elasticity linkage sections (1), two wallboards (3), two base plates (8) are connected to form cavity (7), cavity (7) open top, elasticity linkage section (1) bottom is connected with wallboard (3) top, wallboard (3) bottom links to each other with base plate (8) one ends, the first sound absorption sponge (2) is close to elasticity linkage section (1), and be positioned at cavity (7), the second sound absorption sponge (4) is close to wallboard (3) and base plate (8), and be positioned at cavity (7), microphone holes (5) is positioned at base plate (8) middle part, and the outside of microphone holes (5) is provided with diaphragm seal (6).
2, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification is characterized in that microphone holes (5) aperture is 1.5～2.5cm.
3, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification, the angle that it is characterized in that elasticity linkage section (1) and surface level are 20 °～50 °.
4, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification is characterized in that elasticity linkage section (1) length is 3～10cm.
5, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification is characterized in that wallboard (3) adopts multilayer aluminium sheet damping light sound-insulation structure superposition to form, and wallboard (3) thickness is 3～10mm.
6, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification is characterized in that base plate (8) adopts multilayer aluminium sheet damping light sound-insulation structure superposition to form, and base plate (8) thickness is 3～10mm.
7, the acoustical insulation sound-deadening pipe of on-site noise measurement according to claim 1 and identification, it is characterized in that first sound absorption sponge (2) thickness is 1～3cm, second sound absorption sponge (4) thickness is 1～5cm, the width of cavity (7) is 10～30cm, the height of cavity (7) is 10～30cm, and the width of diaphragm seal (6) is 3～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101718194A CN100523745C (en) | 2007-12-06 | 2007-12-06 | Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101718194A CN100523745C (en) | 2007-12-06 | 2007-12-06 | Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101183023A CN101183023A (en) | 2008-05-21 |
| CN100523745C true CN100523745C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101718194A Expired - Fee Related CN100523745C (en) | 2007-12-06 | 2007-12-06 | Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition |
Country Status (1)
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| CN (1) | CN100523745C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107527609B (en) * | 2017-07-25 | 2020-10-20 | 浙江大学 | Noise absorption and insulation device capable of reducing background noise |
| CN107560722B (en) * | 2017-08-28 | 2019-10-01 | 华东交通大学 | A kind of the high-precision noise measuring method and noise contribution analysis method of box-beam structure |
| CN107314809B (en) * | 2017-08-28 | 2019-10-15 | 华东交通大学 | A kind of high-precision noise-measuring system of box-beam structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2857155Y (en) * | 2005-11-17 | 2007-01-10 | 同济大学 | High efficiency non-fiber broadband metal sound absorption device |
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- 2007-12-06 CN CNB2007101718194A patent/CN100523745C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2857155Y (en) * | 2005-11-17 | 2007-01-10 | 同济大学 | High efficiency non-fiber broadband metal sound absorption device |
Non-Patent Citations (2)
| Title |
|---|
| 铝纤维板共振结构声学特性的理论初析. 王佐民，俞悟周.声学技术，第24卷第3期. 2005 |
| 铝纤维板共振结构声学特性的理论初析. 王佐民，俞悟周.声学技术，第24卷第3期. 2005 * |
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| Publication number | Publication date |
|---|---|
| CN101183023A (en) | 2008-05-21 |
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Granted publication date: 20090805 Termination date: 20111206 |