The invention provides a sound insulation device, a noise reduction system of an automobile and the automobile. The sound insulation device comprises a first sound insulation layer and a second sound insulation layer which are oppositely arranged in the thickness direction of the sound insulation device in a spaced mode, and a plurality of magnetic force adjusting components are arranged in the second sound insulation layer. The plurality of magnetic phonon structures are arranged corresponding to the plurality of magnetic force adjusting parts, and each magnetic phonon structure is umbrella-shaped and is arranged between the first sound insulation layer and the second sound insulation layer; the top of each magnetic phonon structure is fixedly connected with the first sound insulation layer, the outer periphery of the bottom of each magnetic phonon structure abuts against the second sound insulation layer, and each magnetic phonon structure and the second sound insulation layer form a space. The size of the space between each magnetic phonon structure and the second sound insulation layer can be adjusted through a magnetic force adjusting part. According to the scheme, by changing the size of the space between the magnetic phonon structure and the second sound insulation layer in the sound insulation device, the inherent frequency of the magnetic phonon structure can be changed along with the change of the sound field frequency, and then noise is attenuated.
本发明提供一种隔音装置、汽车的降噪系统及汽车。其中,隔音装置包括在隔音装置的厚度方向相对间隔设置的第一隔音层和第二隔音层,第二隔音层内设置有多个磁力调节部件。还包括与多个磁力调节部件对应设置的多个磁性声子结构,各磁性声子结构均呈伞状,且设置在第一隔音层和第二隔音层之间;各磁性声子结构的顶部均与第一隔音层固定连接,各磁性声子结构的底部的外周缘抵靠于第二隔音层,且各磁性声子结构均与第二隔音层形成有一空间。各磁性声子结构与第二隔音层之间的空间的大小经由磁力调节部件可调。本方案通过改变隔音装置中磁性声子结构与第二隔音层之间的空间的大小,能够使磁性声子结构的固有频率随声场频率的变化而变化,进而衰减噪声。
Sound insulation device, noise reduction system of automobile and automobile
隔音装置、汽车的降噪系统及汽车
25.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
Europäisches Patentamt | 2022
|Automobile carpet sound insulation pad and automobile
Europäisches Patentamt | 2022
|