Acoustic material structure and assembly method of acoustic material structure and acoustic radiation structure

Abstract

The present invention provides an acoustic material structure and assembly method of an acoustic material structure and an acoustic radiation structure. The acoustic material structure includes acoustic units and openings; the acoustic units are attached to the surface of the acoustic radiation structure; the acoustic unit comprises a sheet; cavities are defined between the sheets and the acousticradiation structure; the openings pass through the acoustic units respectively; one end of the opening is communicated with the corresponding cavity; the opening can reduce the spring effect of a medium in the cavity, so that the acoustic unit enables a low frequency sound insulation effect even if being attached onto the surface of the acoustic radiation structure; the acoustic unit may also comprises a supporting body, a mass block and a constraining body; the operating frequency of the acoustic unit can be adjusted through the supporting body, the mass block and the constraining body; theacoustic material structure can well suppress the sound energy radiation of large wavelengths in middle and low frequency bands with low weight and low space cost ensured; and the vibration of the sheets can be utilized to enhance the exchange rate of the medium attached to the surface of the acoustic radiation structure, and therefore, through-flow heat dissipation performance can be improved.

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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