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Novel anechoic chamber structure with ultralow cut-off frequency and anechoic chamber unit
The invention provides novel anechoic chamber units and a novel anechoic chamber structure which is composed of the multiple novel anechoic chamber units and has ultralow cut-off frequency, and belongs to the technical field of anechoic devices. The novel anechoic chamber unit comprises a rectangular pipeline, a sound absorption wedge and a cavity, an inlet of the rectangular pipeline is located in the anechoic chamber unit, and an outlet is located in the cavity. A sound absorption material is arranged in the rectangular pipeline; and the rectangular pipeline and the cavity form a Helmholtz resonator. The rectangular pipeline is adopted to replace part of the sound absorption wedges, so that the cavity formed by the rectangular pipeline and the inner wall and the outer wall of the anechoic chamber forms the Helmholtz resonator, low-frequency sound absorption is achieved, and the cut-off frequency of the anechoic chamber is widened.
本发明提供了一种新型消声室单元及该若干个新型消声室单元构成的具有超低截止频率的新型消声室结构，属于消声装置技术领域。该新型消声室单元包括矩形管道、吸声尖劈和空腔；矩形管道的入口位于消声室单元内部，出口位于空腔中；矩形管道内设置有吸声材料；矩形管道与空腔形成赫姆霍兹共振器。本发明通过采用矩形管道代替部分吸声尖劈，使矩形管道与消音室内外墙壁组成的空腔形成赫姆霍兹共振器，实现低频吸声，拓宽了消声室的截止频率。
Novel anechoic chamber structure with ultralow cut-off frequency and anechoic chamber unit
The invention provides novel anechoic chamber units and a novel anechoic chamber structure which is composed of the multiple novel anechoic chamber units and has ultralow cut-off frequency, and belongs to the technical field of anechoic devices. The novel anechoic chamber unit comprises a rectangular pipeline, a sound absorption wedge and a cavity, an inlet of the rectangular pipeline is located in the anechoic chamber unit, and an outlet is located in the cavity. A sound absorption material is arranged in the rectangular pipeline; and the rectangular pipeline and the cavity form a Helmholtz resonator. The rectangular pipeline is adopted to replace part of the sound absorption wedges, so that the cavity formed by the rectangular pipeline and the inner wall and the outer wall of the anechoic chamber forms the Helmholtz resonator, low-frequency sound absorption is achieved, and the cut-off frequency of the anechoic chamber is widened.
本发明提供了一种新型消声室单元及该若干个新型消声室单元构成的具有超低截止频率的新型消声室结构，属于消声装置技术领域。该新型消声室单元包括矩形管道、吸声尖劈和空腔；矩形管道的入口位于消声室单元内部，出口位于空腔中；矩形管道内设置有吸声材料；矩形管道与空腔形成赫姆霍兹共振器。本发明通过采用矩形管道代替部分吸声尖劈，使矩形管道与消音室内外墙壁组成的空腔形成赫姆霍兹共振器，实现低频吸声，拓宽了消声室的截止频率。
Novel anechoic chamber structure with ultralow cut-off frequency and anechoic chamber unit
具有超低截止频率的新型消声室结构及消声室单元
LI JIAZHU (author) / YIN BAOWEI (author) / BI CHUANXING (author) / QING ZHENHUA (author) / LI CAICHANG (author) / FU YILANG (author) / ZHANG YONGXIANG (author) / ROH JOUNG-HO (author) / YUAN PEIJING (author) / WANG BO (author)
2024-05-10
Patent
Electronic Resource
Chinese
Sound absorption assembly for anechoic chamber and anechoic chamber
| European Patent Office | 2021