Muffling structure

A sound-absorbing material and film technology, which is applied in the direction of sound-generating devices, layered products, instruments, etc., can solve the problems of increasing material thickness and dosage, increasing material, and reducing the cost performance of sound-absorbing materials, so as to achieve good sound-absorbing effect, avoid strong reflection, and The effect of the noise reduction effect

Active Publication Date: 2012-12-12
广州泰力高汽车零部件有限公司
View PDF11 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the sound-absorbing effect of fiber-based sound-absorbing materials will be affected by the thickness of the fiber diameter. The finer the fiber material, the sound-absorbing effect will increase at higher frequencies, but the sound-absorbing effect will be poor at low frequencies.
For example, PP fiber with a diameter of 2-6 microns has a good sound-absorbing effect on noise above 3000 Hz, but the sound-absorbing effect on noise in the range of 125-2000 Hz cannot meet the requirements of high-end users.
If a satisfactory sound absorption effect is to be achieved in a wide frequency range of 125-6000 Hz, the thickness and amount of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Muffling structure
  • Muffling structure
  • Muffling structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A sound-absorbing structure such as figure 1 , comprising a first fiber material layer 2 and a second fiber material layer 4 made of fiber material, a plastic film 3 made of PP is arranged between the first fiber material layer and the second fiber material layer, the first fiber material layer Films 1, 5 made of PE and PET materials are arranged on the outside of the second fiber material layer, respectively. The surface of each layer of film is soft, uneven in thickness, and the surface is undulating and uneven. The membrane resonance structure formed by the thin film between the two fiber material layers and the two outer thin films forms absorption peaks for noise in multiple different frequency bands; thereby achieving excellent sound absorption and noise reduction effects. The distance between the films can be different, that is, the thickness of the fiber material layer is different. Through the setting of different distances, the difference in the frequency ban...

Embodiment 2

[0019] A sound-absorbing structure such as figure 2 , including a fiber material layer 2, films 1 and 3 are arranged on both sides of the fiber material layer, and the film is a soft film processed from one of PP, PE, PET, EVA materials, or more than one of them A soft film made of a mixture of two materials. The surface of the film is soft and undulating; at the same time, the film has uneven thickness, uneven density, and uneven surface.

Embodiment 3

[0021] A sound-absorbing structure such as image 3 The sound-absorbing material body is composed of a fiber material layer 4 and a foam material layer 6, and a film 3 is arranged between the fiber material layer and the foam material layer. The film can be made of one of PP, PE, PET, and EVA materials. A soft film made of a material or a variety of processes or an air-blocking skin formed when a foamed material is foamed. The outer side of the fiber material layer is provided with a soft film 1 processed from one of PP, PE, PET, EVA materials, or a mixture of multiple materials. The outer side of the foam material layer is provided with an airflow barrier formed by processing one of PP, PE, PET, and EVA materials, or a mixture of multiple materials, or formed when the foam material is foamed. A soft film formed from the epidermis5.

[0022] The foam material layer 6 can be made of open and / or partially open foam material. The opening ratio of the foam material can be adjus...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a muffling structure which comprises more than two layers of resonant film materials. The adopted film is soft, uneven in surface and has airflow barrier. The surface of the film is uneven on the basis of the soft film, so that the absorption peak of the resonant structure deflects to the low frequency, the absorption of the low frequency is promoted; and moreover, when the medium-high frequency sound is incident from different angles, the sound waves have a chance to reflect on the surface of the film repeatedly; and therefore, the opportunity that the sound waves pass through the airflow barrier film is greatly increased, the strong reflection of the smooth airflow barrier film on the medium-high frequency sound is avoided, most of the medium-high frequency sound can enter the structure to be absorbed, and the absorption of the medium, high and low-frequency sound is considered.

Description

technical field [0001] The invention relates to a noise reduction processing technology, in particular to a noise reduction structure for noise reduction processing. Background technique [0002] In daily life, industrial production and commercial environment, noise pollution is sometimes very serious, which brings troubles to people's work and quality of life. In order to reduce the adverse effects of noise pollution in the environment, fiber-based sound-absorbing materials have been widely used because of their ultra-thin, soft, weather-resistant, non-aging properties, convenient construction, and low cost. [0003] However, the sound-absorbing effect of fiber-based sound-absorbing materials will be affected by the thickness of the fiber diameter. The thinner the fiber material, the more effective the sound-absorbing effect will be at higher frequencies, but the sound-absorbing effect will be poor at low frequencies. For example, PP fiber with a diameter of 2-6 microns ha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G10K11/168G10K11/172B32B3/24
Inventor 何学斌罗敏雄张秀平
Owner 广州泰力高汽车零部件有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap