Composite sound absorption structure

A sound-absorbing and cover-plate technology, which is applied in the direction of sound-emitting devices and instruments, to achieve the effects of easy processing, convenient installation and low cost

Pending Publication Date: 2016-07-27
BEIJING MUNICIPAL INST OF LABOUR PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to widen the sound absorption bandwidth of the composite sound-absorbing panel and enhance the sound-absorbing effect without increasing the complexity of the structure of the composite sound-absorbing panel

Method used

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] Such as figure 1 and figure 2 As shown, it is a composite sound-absorbing structure provided by the present invention, which includes a cover plate 1, a side plate 3, a bottom plate 2, a film unit 4 and a mass block 5, and the cover plate 1 and the bottom plate 2 are arranged at intervals relative to each other. The side plates 3 are closely connected with the cover plate 1 and the bottom plate 2 respectively to form a sound-absorbing back cavity; the cover plate 1 is provided with a number of micro sound-absorbing holes 11 and a plurality of unit holes 12, and a plurality of the units The holes 12 may be different in size or equal in size; each of the unit holes...

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Abstract

The invention relates to the acoustic panel absorber field and discloses a composite sound absorption structure. The composite sound absorption structure comprises a cover plate, side walls, a bottom plate, a film unit and a quality block; the cover plate and the bottom plate are arranged oppositely and at intervals; and the side walls are connected with the bottom plate and the cover plate tightly to form a sound absorption back cavity. The cover plate is equipped with a plurality of micro-sound absorption holes and a plurality of unit holes with various sizes, and each unit hole is internally provided with the film unit. The quality block is attached on the film unit. The composite sound absorption structure widens the sound absorption bandwidth of the sound absorption plate, enhances the sound absorption effect, and is easy to process and install and is low in cost.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing panels, in particular to a composite sound-absorbing structure. Background technique [0002] The traditional perforated plate resonant absorption structure has a closed cavity behind each hole on the perforated plate, which is equivalent to many parallel "Helmholtz" resonators. When the frequency of the incident wave is consistent with the resonance frequency of the system, that is resonate. At this time, the reciprocating vibration of the air at the hole of the perforated plate reaches the maximum amplitude, and the friction and damping are also the maximum, and the sound energy is converted into heat energy due to viscous loss, that is, the sound energy dissipation reaches the maximum. This is the advantage of the perforated plate resonant absorption structure. However, this structure also has its inherent disadvantages. The main disadvantage is that the frequency selectivity is stron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16G10K11/172
Inventor 盖晓玲李贤徽张斌马智慧邢拓
Owner BEIJING MUNICIPAL INST OF LABOUR PROTECTION
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