An acoustic material structure and its assembly method with an acoustic radiation structure

Abstract

The present invention provides an acoustic material structure and an assembly method thereof with an acoustic radiation structure, wherein the acoustic material structure includes an acoustic unit for being attached to the surface of the acoustic radiation structure, and the acoustic unit includes a sheet, and the sheet and There is a cavity between the sound radiation structures; an opening passing through the acoustic unit, and one end of the opening communicates with the cavity. The opening can reduce the spring effect of the medium in the cavity, so that the acoustic unit can be adhered to the surface of the sound radiation structure to achieve low-frequency sound insulation effect. The acoustic unit may further include a supporting body, a mass block and a constraining body. The working frequency of the acoustic unit can be adjusted through the supporting body, the mass block and the restricting body. Under the premise of low weight and space costs, the acoustic material structure can well suppress the sound energy radiation of medium and low frequency bands and large wavelengths, and utilize the vibration of the sheet to enhance the medium exchange rate on the surface of the attached structure to improve the performance of flow and heat dissipation.

Description

technical field [0001] The invention relates to the field of materials, in particular to an acoustic material structure and an assembly method thereof with an acoustic radiation structure. Background technique [0002] Housing construction, pipeline lines, transportation, electromechanical equipment and household appliances and other surface shell structures are subject to self- and external excitations that cause vibrations on the surface of the structure, which in turn disturbs fluid media such as surrounding air and liquids, causing acoustic radiation and environmental noise problems. Since the excitation source is usually difficult to avoid, the practical noise reduction methods can be roughly classified into two categories: one is to suppress the vibration level of the structure surface; the other is to block the propagation of sound waves in the medium. [0003] In order to suppress the vibration of the structure surface, it is possible to attach a material capable of ...

AI Technical Summary

Problems solved by technology

However, none of the above noise suppression technical solutions can effectively balance noise suppression performance and heat dissipation performance under the premise of small additional weight and space cost

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