A structure that uses magnetism to improve low-frequency sound absorption performance
A low-frequency, sound-absorbing technology, applied in the direction of sound-emitting devices and instruments, can solve problems such as reducing the damping coefficient and reducing the elastic coefficient of mechanical impedance, so as to achieve the effects of reducing the elastic coefficient, improving low-frequency sound-absorbing performance, and reducing elastic force
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[0018] see figure 1 , Two horizontal brackets 2 perpendicular to the wall 1 are fixedly installed on the wall 1, and the two brackets 2 have the same structure and are parallel to each other. A mechanical impedance plate 5 parallel to the wall surface 1 is arranged between the two transverse supports 2, and the mechanical impedance plate 5 is parallel to the wall surface 1 with a certain distance therebetween. A square resonance cavity is formed between a mechanical impedance plate 5, two transverse supports 2, and the wall surface 1, and a pair of magnetic material blocks 6 are arranged inside the square resonance cavity, and one of the magnetic material blocks in the pair of magnetic material blocks 6 The blocks are fixedly connected to the wall 1 , and the other one of the pair of magnetic material blocks 6 is fixedly connected to the mechanical impedance plate 5 . That is, a pair of magnetic material blocks 6 are located between the wall 1 and the mechanical impedance pla...
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