SU996662A1

SU996662A1 - Sound-absorbing apparatus

Info

Publication number: SU996662A1
Application number: SU813318217A
Authority: SU
Inventors: Тамара Ивановна Галактионова; Сергей Павлович Соловьев; Александр Алексеевич Шилкин; Владимир Семенович Зайцев; Галина Васильевна Сигаева
Priority date: 1981-07-17
Filing date: 1981-07-17
Publication date: 1983-02-15

Description

Изобретение относитс к строитеЛьству , а именно к звукопоглощающим устройствам, -примен емым в помещени х гражданского и прокышленного назначени .The invention relates to construction, in particular, to sound-absorbing devices used in civilian and commercial premises.

Известно звукопоглощающее устройство , включающее потолок, состо щий из множества подвесных потолочных панелей, которые располагаютс вер- ; тикально и образуют грани элементов в форме; открытой коробки С1J.A sound absorbing device is known, comprising a ceiling consisting of a plurality of suspended ceiling panels that are vertically mounted; tically and form the edges of the elements in the form; open box C1J.

Недостатком указанной конструкции вл етс ее сложность при монтаже и недостаточные звукопоглощающие свойства в широкой области частот.The disadvantage of this design is its complexity during installation and insufficient sound-absorbing properties in a wide frequency range.

Наиболее близким техническим решением к изобретению вл етс звукопбглсадаювдее устройство, включающее раму в виде решетки, установленную с зазором на ограждающей кон . струкции t2 .3.The closest technical solution to the invention is a sound device, a device comprising a frame in the form of a lattice, installed with a gap on the enclosing beam. structure t2 .3.

Недостатком данного устройства вл етс низкое звукопоглощение в широком диапазоне частот.The disadvantage of this device is low sound absorption in a wide frequency range.

Цель изобретени - увеличение звукопоглощени в широком диапазоне частот и улучшение аэрозионного режима помещени .The purpose of the invention is to increase sound absorption in a wide frequency range and to improve the aerosion regime of a room.

Указанна цель достигаетс тем, что звукопоглощающее устройство.This goal is achieved by the fact that the sound-absorbing device.

включающее раму в виде решетки установленную с зазором на ограждающей конструкции, снабжено, металлизированной пленкой, расположенной между рамой и ограждающей конструкцией на рассто нии, равном 0,8-2 максимальной длины волны комфортного слухового воспри ти , а грани решетки, обращенные внутрь помещени , заострены на нет.including a lattice frame mounted with a gap on the enclosing structure, provided with metallized film located between the frame and the enclosing structure at a distance equal to 0.8-2 of the maximum wavelength of the comfort hearing, and the grill faces facing the inside of the room are pointed for no.

Кроме того, устройство снабжено блоком управлени дл подачи электрического потенциала на заостренные грани решетки.In addition, the device is equipped with a control unit for applying electric potential to the pointed edges of the grid.

На фиг. 1 изображено предложенное звукопоглощающее устройство, общий вид; на фиг. 2 - разрез А-А на фиг.1.FIG. 1 shows the proposed sound-absorbing device, a general view; in fig. 2 shows a section A-A in FIG.

Claims

The sound device includes a frame 1 in the form of a lattice, made of metal with a thickness of 3-5 mm, mounted with a gap on the enclosing structure -2. A metallized film 3, for example polyethylene terephthalate (PET), is located between the frame and the enclosing structure, at a distance ,. equal to 0.8–2 of the maximum wavelength of the comfort hearing, and the edges of the film around the perimeter are fixed by fastening element 4. The edges of the lattice facing the inside of the room are tapering to nothing. In addition, the sound-absorbing device is equipped with a control unit 5, which includes a voltage divider, a voltage divider and polarity switch, positive and negative multiplication units, for supplying electric potential to the pointed edges of the lattice. To drain aero ions from the pointed ends of the carrier frame, the ratio of the height of the face to its thickness is. 20: 1 range - 100: 1, and the ratio of the height of the face to the height of sharpening 2: G - 4: 1. Sound insulation device works as follows. H BecTHOj that diffraction sieves. ka converts a plane wave incident on it into a set of one or several reflected plane waves propagating at strictly defined angles depending on the incidence of the primary wave, frequency response and lattice period, and an infinite number of surface (non-uniform) waves playing an essential role only near the lattice. The sound absorption coefficient of the system is determined from the boundary conditions on the lattice for the total incident field and reflected waves, as well as the field excited in the gaps between the edges where the film is located, which acts as a membrane, increasing the sound absorption coefficient of the whole structure. A constant electrically potential of 30–40 kV is supplied to the suspended ceiling from the control unit. In this case, from the pointed edges, where a high gradient of the potential of the electric field is observed, there occurs an autoelectronic EMISSION, consisting in the production of light aeroions of negative or positive sign (depending on the sign of the applied electric potential). The concentration of light ions produced depends on the magnitude of the applied voltage and the degree of sharpening of the faces. In order to create the necessary gradient of power, the ratio of the height of the face to its thickness lies in the range of 20: 1 - 100: 1, and the ratio of the height of the face to the height of the sharpening - 2: 1 - 4: 1. Simultaneously with the increase in the concentration of light aeroions, the concentration of heavy aeroions decreases due to their subsidence under the action of a large electric field on the surface of the floor, which improves the air ion mode of the room. The increase in the insulating properties of this device depends on the thickness of the air gap enclosed between the film and the enclosing structure, tightly adjacent to the perimeter of it. The application of the proposed design of a sound-absorbing device allows increasing the degree of sound absorption in a wide range of frequencies and improving the aero-ion mode of the room. Claim 1. Sound-absorbing device comprising a frame in the form of a lattice, installed with a gap on the enclosing structure, characterized in that, in order to increase sound absorption in a wide frequency range, it is provided with a metallized film located between the frame and the enclosing structure at a distance equal 0.8–2 is the maximum wavelength of a comfortable auditory perception, and the edges of the rechiTe, facing the inside of the room, are sharpened.

2. The device according to claim 1, characterized in that, with the purpose of improving the air-conditioned mode of the room, it is equipped with a control unit for. supply of electric potential to the pointed edges of the lattice. Sources of information that are taken into account during the examination 1. French Patent No. 2021960, cl. Е 04 В Ь / 00, 1970. 2-. USSR Author's Certificate 588319, cl. E 04 B 1/99, 1974 (prototype).