SU1218019A1 - Acoustic module - Google Patents

Description

The invention relates to the construction, in particular to surround sound absorbers.

The aim of the invention is to provide the possibility of using an acoustic module as a surround sound absorber.

FIG. 1 shows the acoustic module, a general view; in fig. 2 - method of acoustic modules acoustic modules when using i.h. as volume sound absorbers.

Acoustic module includes soundproof | Loaved material 1 of porous cellular concrete with a density of 300-350 kg / m with longitudinal slots 2 located on both sides of the module. The cracks in the depth of the product are made in the form of resonant cavities 3.

The cutters are made in such a way that the gap between the gap width and the cavity width is 1 / 2–1 / 6, and the ratio of the total depth of two symmetrically spread holes and the cavities to the thickness of the mode. 1 is at most 0.8.

When using an acoustic module as a surround sound attenuator, a suspension system consisting of a flexible LHHypa 4 covering the module through the extreme slots of the hook 5 and the driving element 6 can be used.

The arrangement of the resonant cavities with a gap in two rows of symmetrical middle P.1OSKOST allows you to acoustic-absorbing both surfaces acoustic

five

0

five

WHOM is a modulus, and making a slab of cellular concrete improves its sound properties and significantly reduces the entire article. This generally allows the use of the specified module as a sound absorber.

Completion of the acoustic mode; 1 with respect to the width of the slits and the resonant cavities of the bolus e 1/2 does not provide the required new sound-absorbing properties, especially at low frequencies, i.e. the positive role of the resonators is not revealed due to a slight nie. iH in the depth of the product.

The manufacture of a module with a ratio of n.1irin slots and cavities less than 1/6 also does not provide high acoustic properties, since the number of resonators in the module is reduced due to the expanded resonance cavities of the resonant cavities.

Completing a module with a ratio m of the total depth of two symmetrically located cavities with glands to the total thickness of the module greater than 0.8 leads to plate failure, as the sectional area of the material working on bending decreases.

The use of volumetric sound absorbers made of cellular concrete in production | 1 rooms gives you the opportunity to reduce the level of sound in the frequency range and thus ensure normal working conditions. In addition, it is easy to mechanize and automate the manufacture of uno-muted sound absorbers, and labor costs in their production are insignificant.

Editor .L. Gulko Order 1093./38

(() With 1avitsl. D. Adas. Yuv Te.rell I. VeresKorrektor .M.

Circulation 729 Subscription

VNIIPI USSR State Committee

on acquisitions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. 11project. four

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and.

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Demchik

Claims (1)

ACOUSTIC MODULE, including a plate with resonant cavities connected to the volume of the room through slit-like openings, characterized in that, in order to enable its use as a volumetric sound absorber, the plate is made of cellular concrete, and resonant cavities with slit-like openings are arranged in two rows symmetrically the middle plane of the slab, and the ratio of the width of the slit to the width of the cavity is in the range 1 / 2-1 / 6, and the ratio of the total depth of two symmetrically located cavities with firs module to the total thickness is not more than 0.8. Fng. 1