Low-frequency broadband ventilation, heat-dissipating and sound-insulating structure

Abstract

The invention belongs to the sound insulation technological field and relates to a low-frequency broadband ventilation, heat-dissipating and sound-insulating structure. The low-frequency broadband ventilation, heat-dissipating and sound-insulating structure includes a plurality of periodically-arranged Helmholtz resonators and sound absorbing plate structures disposed in the Helmholtz resonators;the upper end and lower end of the Helmholtz resonator are respectively provided with at least one extension path extending toward the inside of the cavity of the Helmholtz resonator, and wherein theextension path is communicated with the outside; and at least one ventilation vent hole is formed in the middle of the sound absorbing plate structure. According to the low-frequency broadband ventilation, heat-dissipating and sound-insulating structure of the invention, the sound absorbing plate structures are arranged in the Helmholtz resonators, so that a sound insulation problem in the Helmholtz resonators caused by high-frequency modes can be solved, and the low-frequency broadband sound insulation of the whole structure can be realized; and the functions of ventilation and heat dissipation are realized by the ventilation and heat-dissipating holes formed in the sound absorbing plate structures and the extension paths in the Helmholtz resonators.

Description

technical field [0001] The invention relates to the technical field of sound insulation, in particular to a low-frequency broadband ventilation and heat dissipation sound insulation structure. Background technique [0002] Traditional sound insulation technology can effectively isolate high-frequency components in noise, while low-frequency noise has the characteristics of long propagation distance, strong sound transmission ability, and difficult isolation, which has always been a difficult problem in noise control. [0003] The sound insulation of traditional sound insulation materials in the low frequency band is controlled by the law of mass density, and it is difficult to achieve low frequency broadband sound insulation with lightweight materials. At the same time, when some equipment needs sound insulation treatment, it must meet certain heat dissipation requirements. The sound barrier also needs to withstand a certain amount of wind pressure while insulating the soun...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low frequency broadband ventilation and heat dissipation sound insulation structure to solve the problem that the traditional sound insulation technology cannot meet the low frequency broadband sound insulation requirements while having ventilation and heat dissipation functions

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