CN2845090Y

CN2845090Y - Assembled plate for absorbing acoustic energy

Info

Publication number: CN2845090Y
Application number: CN 200520092543
Authority: CN
Inventors: 陈长征; 徐蕾; 周勃; 勾轶; 张宇
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2005-09-19
Filing date: 2005-09-19
Publication date: 2006-12-06
Anticipated expiration: 2015-09-19

Abstract

The utility model provides a sound absorption assembled plate of a wide frequency band; different diameter holes are combined and arranged on the upper surface of a mineral cotton plate, and the holes penetrate through the mineral cotton plate. The utility model can be arranged on the corresponding position; the utility model which can be used in engineering to absorb middle-frequency and low-frequency sound, has the advantages of good sound absorption, long service life and light and thin materials; the utility model is a novel sound absorption used in strict environmental conditions.

Description

Broadband combined type acoustic board

Technical field:

The utility model relates to a kind of acoustic board, particularly a kind of broadband combined type acoustic board.

Technical background:

Along with developing rapidly of industry, building industry, transportation, noise becomes one of human environment four big public hazards, and is human more and more urgent to noise abatement.The various device of many large and medium-sized enterprise is more and more, and all kinds of auxiliary devices of public building are to use more and more widely, and the harm of noise on human is serious day by day.

Acoustic board and correlated product kind are many at present, and sound absorption structure commonly used has thin plate, perforated plate and microperforated panel.Mostly be poriness or fibrous material, all be on material, to be processed into uniform sound absorption resonance lumen pore, and absorb sound with multilayer acoustic board and air layer combination.The problem that they exist mainly is:

(1) sound sucting band is narrow.General noise source all is compound frequency band, and promptly by basic, normal, high band noise combination, traditional acoustic board is for most of low and medium frequency noises, and acoustically effective is unsatisfactory, therefore can only acoustically effective be arranged at certain specific noise;

(2) acoustically effective is not good.General acoustic board has only plays decoration function, and what have has acoustically effective concurrently, but absorption all is no more than 5dB (A)

(3) material is thick and heavy.In order to satisfy the multi-frequency request for utilization, traditional acoustic board need increase material thickness or unit weight, thereby causes the sound absorber heavy construction, so that brings potential safety hazard when doing structure such as furred ceiling;

(4) serviceable life is short.The porous material surface hole is easily intake and is stopped up by dust, and sound absorbing capabilities is descended, and can cause losing efficacy after using over a long time;

(5) take up room greatly.Because the sound absorption frequency of acoustic board needs the air cavity by combination, tend to so increase floor area in order to strengthen acoustically effective;

(6) price height.Though individual layer sound absorption structure not expensive (except the microperforated panel), sound absorbing capabilities are determined by air layer thickness, therefore need make up sandwich construction and air layer when construction, therefore construction is complicated, the construction costs height.

Summary of the invention:

The purpose of this utility model is the problem that exists in the above-mentioned technology, and a kind of broadband combined type acoustic board is provided.It is that a kind of low frequency absorption is good, and acoustic frequency bandwidth is simple in structure, long service life, the novel acoustic board that material is frivolous.Be specially adapted to use under the harsh environmental baseline.

The purpose of this utility model is such realization: comprise mineral wool board, it is characterized in that, the open-work of assembled arrangement different-diameter on mineral wool board.Can absorb the noise of different frequency.

The utility model has the advantages that:

(1) acoustic frequency bandwidth.Because the sound absorption frequency of sound absorption structure is relevant with diameter, therefore make up different apertures, to eliminate the noise of basic, normal, high frequency, acoustically effective is good;

(2) simple in structure.Because sandwich construction in the past is compounded in the plate, only need be directly installed on wall, construction and maintenance are all very easy;

(3) take up room little.Tend to so increase the construction volume in order to strengthen acoustically effective;

(5) cheap.Processing charges than microperforated panel are low, and material is also relatively cheap.

Principle: original resonance sound-absorbing material is divided into thin plate, single chamber, perforated plate and microperforated panel resonance absorber again, and wherein perforated plate is big because of its acoustical absorption coefficient, and the sound absorption frequency is wide, advantage such as not affected by environment and coming into one's own day by day.Acoustic absorbant is divided into porous sound-absorbing material and resonance sound-absorbing material by its mechanism difference.The former sound absorbing mechanism is after sound wave enters the material hole, causes the friction of air and material in the hole, and acoustic energy is converted into heat energy and is absorbed, because cost is low, light weight need not support frame and become the acoustic absorbant that generally uses.But because the material of poriness sound absorber mostly is glass wool, mineral cotton, polyfoam, therefore skin is had stimulation, water-intake rate height, easy deformation and obstruction are subjected to the restriction of environment for use simultaneously.

Description of drawings:

Fig. 1 is a structural drawing of the present utility model

Fig. 2 is an open-work arrangement mode synoptic diagram of the present utility model

Embodiment:

As shown in Figure 1, on mineral wool board 1, be arranged with big open-work 2, little open-work 3, and its hole penetrated in mineral wool board.The number in hole can be formulated according to actual needs.

As shown in Figure 2, the concrete arrangement mode in hole.

Claims

1, a kind of broadband combined type acoustic board comprises mineral wool board, it is characterized in that the open-work of assembled arrangement different-diameter on mineral wool board.