Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Frequency-adjustable sound absorption board based on Helmholtz resonators
The invention provides a frequency-adjustable sound absorption board based on Helmholtz resonators. According to the requirement of reverberation time of a hall, the sound absorption quantity of a sound absorption body can be adjusted, the sound absorption frequency band can be widened, and high-efficiency sound absorption in a wide frequency band range can be realized. The frequency-adjustable sound absorption board comprises a plurality of frequency-adjustable Helmholtz resonator units which are arranged in parallel and can change the lengths of neck tubes without changing the volumes of resonance cavities, wherein a cylindrical cavity is arranged inside each Helmholtz resonator unit; a slit is formed in each shell; each C-shaped opening cylinder is coaxial with the corresponding cylindrical cavity; an opening is formed in the cylindrical wall of each C-shaped opening cylinder, an air baffle is arranged on one side of each opening, and an annular seam between the cylindrical wall ofeach C-shaped opening cylinder and the inner wall of the corresponding cylindrical cavity is divided into two parts, one part is an air channel, and the other part is a non-air channel; each air channel enables the corresponding slit with the opening on the corresponding C-shaped opening cylinder to communicate to form a neck tube of each Helmholtz resonator; and by rotating the C-shaped opening cylinders, the lengths of the neck tubes of the Helmholtz resonator units can be adjusted.
本专利提供了一种基于亥姆霍兹共鸣器的可调频吸声板，可根据厅堂混响时间的要求，调节吸声体的吸声量，拓宽吸声频带，实现宽频带范围内高效吸声。它包括若干个平行排列的可改变颈管长度而共振腔体积不变的可调频亥姆霍兹共鸣器单元，亥姆霍兹共鸣器单元内部具有圆柱形空腔；壳体上开有狭缝；C形开口圆筒与圆柱形空腔同轴；C形开口圆筒的圆筒壁上开有开口，开口一侧设置的空气挡板，将C形开口圆筒的圆筒壁与圆柱形空腔内壁之间的环缝分割成两部分，一部分是空气通道，一部分是非空气通道；所述空气通道把狭缝与C形开口圆筒上的开口连通，形成了亥姆霍兹共鸣器的颈管；通过转动C形开口圆筒，可以调节亥姆霍兹共鸣器单元的颈管长度。
Frequency-adjustable sound absorption board based on Helmholtz resonators
The invention provides a frequency-adjustable sound absorption board based on Helmholtz resonators. According to the requirement of reverberation time of a hall, the sound absorption quantity of a sound absorption body can be adjusted, the sound absorption frequency band can be widened, and high-efficiency sound absorption in a wide frequency band range can be realized. The frequency-adjustable sound absorption board comprises a plurality of frequency-adjustable Helmholtz resonator units which are arranged in parallel and can change the lengths of neck tubes without changing the volumes of resonance cavities, wherein a cylindrical cavity is arranged inside each Helmholtz resonator unit; a slit is formed in each shell; each C-shaped opening cylinder is coaxial with the corresponding cylindrical cavity; an opening is formed in the cylindrical wall of each C-shaped opening cylinder, an air baffle is arranged on one side of each opening, and an annular seam between the cylindrical wall ofeach C-shaped opening cylinder and the inner wall of the corresponding cylindrical cavity is divided into two parts, one part is an air channel, and the other part is a non-air channel; each air channel enables the corresponding slit with the opening on the corresponding C-shaped opening cylinder to communicate to form a neck tube of each Helmholtz resonator; and by rotating the C-shaped opening cylinders, the lengths of the neck tubes of the Helmholtz resonator units can be adjusted.
本专利提供了一种基于亥姆霍兹共鸣器的可调频吸声板，可根据厅堂混响时间的要求，调节吸声体的吸声量，拓宽吸声频带，实现宽频带范围内高效吸声。它包括若干个平行排列的可改变颈管长度而共振腔体积不变的可调频亥姆霍兹共鸣器单元，亥姆霍兹共鸣器单元内部具有圆柱形空腔；壳体上开有狭缝；C形开口圆筒与圆柱形空腔同轴；C形开口圆筒的圆筒壁上开有开口，开口一侧设置的空气挡板，将C形开口圆筒的圆筒壁与圆柱形空腔内壁之间的环缝分割成两部分，一部分是空气通道，一部分是非空气通道；所述空气通道把狭缝与C形开口圆筒上的开口连通，形成了亥姆霍兹共鸣器的颈管；通过转动C形开口圆筒，可以调节亥姆霍兹共鸣器单元的颈管长度。
Frequency-adjustable sound absorption board based on Helmholtz resonators
一种基于亥姆霍兹共鸣器的可调频吸声板
WU XIAOLI (Autor:in) / WANG LIJIE (Autor:in) / NI XIAOYU (Autor:in) / WU HONGZHANG (Autor:in)
13.11.2020
Patent
Elektronische Ressource
Chinesisch
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