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Micro-perforated panel sound absorbing body with rough surface modified micro-pores

A technology of micro-perforated panels and rough surfaces, applied to floors, building components, sound insulation, etc., can solve problems such as poor sound absorption effect and inconvenient adjustment of audio absorption bands, and achieve excellent sound absorption effect, simple structure, and good sound energy Effect

Inactive Publication Date: 2019-05-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a micro-perforated sound-absorbing body with micro-holes modified on the rough surface to solve the problem that the sound-absorbing band of the existing micro-perforated sound-absorbing board is not easy to adjust and the sound-absorbing effect is not good. The best problem, the structure is simple, reasonable, easy to use, the micro-perforated plate sound-absorbing body can adjust the sound-absorbing band and improve the sound-absorbing effect by adding rough surface modification

Method used

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  • Micro-perforated panel sound absorbing body with rough surface modified micro-pores
  • Micro-perforated panel sound absorbing body with rough surface modified micro-pores
  • Micro-perforated panel sound absorbing body with rough surface modified micro-pores

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Embodiment

[0053] see figure 1 and figure 2, the sound absorber includes a perforated panel 1 and a rigid backing 2 . For the convenience of observing the variation of hole shape in this embodiment, figure 2 In the figure, the sound-absorbing hole 3 opened on the perforated panel 1 is enlarged, and the shape of the rough hole is observed.

[0054] The thickness of the perforated panel 1 is 6 mm and the cavity thickness is 50 mm. The perforated panel 1 is evenly opened with a reference aperture r 0 The sound-absorbing hole is 0.5mm, so that the noise can enter the composite structure, so as to achieve the purpose of sound absorption. The sound-absorbing holes 3 are arranged in a square, the hole spacing is 3.545mm, and the perforation rate is 6.25%. The range of roughness factor ε is [0,0.2], and the range of β is [0,6π]. The cavity between the perforated panel 1 and the rigid backing 2 is filled or not filled with porous sound-absorbing material.

[0055] In this embodiment, the...

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Abstract

The invention discloses a micro-perforated panel sound absorbing body with rough surface modified micro-pores. The micro-perforated panel sound absorbing body with the rough surface modified micro-pores comprises a perforated panel and a rigid back lining; a cavity is formed between the perforated panel and the rigid back lining; rough sound absorbing pores are formed in the perforated panel; thedirections of the pores are all perpendicular to an upper panel; the rough pore shapes of the sound absorbing pores which are formed in the perforated panel are controlled by using a function. The micro-perforated panel sound absorbing body with the rough surface modified micro-pores is simple and practical in structure, has good medium and low frequency band sound absorption performance and flexible sound absorbing adjusting function, has the characteristic of light weight, and has good and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a micro-perforated plate sound-absorbing body with rough surface-modified micro-holes. Background technique [0002] The existing micro-perforated sound-absorbing panel is a panel body that absorbs sound and reduces noise by arranging sound-absorbing holes on the panel body with a cavity, and is mainly used in large or small indoor scenes such as concert halls, museums, and conference rooms. The holes in the general micro-perforated sound-absorbing panels are smooth round holes, and there are common problems that the sound-absorbing band is not easy to adjust and the sound-absorbing effect is not good. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a micro-perforated sound-absorbing body with micro-holes modified on the rough surface to solve the problem that the sound-absorbing band of the exi...

Claims

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Application Information

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IPC IPC(8): E04B1/82E04B1/84
Inventor 卢天健辛锋先徐志敏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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