Novel double-cavity Helmholtz resonator

• Main Authors: WANG XIKUN, LIU JIAN, PAN WEICHEN, HAN CHEN, SHEN YONG, YAN XINGCHUN, LIU CHUANYI
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; SOUND-PRODUCING DEVICES

The invention discloses a novel double-cavity type Helmholtz resonator. The novel double-cavity Helmholtz resonator comprises an air inlet pipe, the side wall of the air inlet pipe is communicated with a hush pipe through two short pipes, the hush pipe is provided with a fracture located between the two short pipes, a base is arranged at the fracture, a sliding way is formed in the base, a damping plate is inserted into the sliding way, the damping plate divides the hush pipe into a first resonant cavity and a second resonant cavity, and the first resonant cavity is communicated with the second resonant cavity. Transverse holes are formed in the two sides of the sliding way, elastic lifting pins are arranged in the transverse holes, spherical convex faces are arranged at the front ends of the elastic lifting pins, spherical concave faces matched with the spherical convex faces are formed in the damping plate, shoulders are arranged at the tail ends of the elastic lifting pins, and hole steps are arranged at t