Multilayer nested low-frequency broadband sound absorption device based on resonance sound absorption
A sound-absorbing device and resonant sound-absorbing technology, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of poor absorption effect, narrow absorption frequency band, and large volume, and achieve the effects of light weight, widening sound absorption frequency band, and small volume
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[0026] Such as Figure 1-Figure 6 As shown, this embodiment relates to a multi-layer nested low-frequency broadband sound-absorbing structure, which adopts but is not limited to a four-layer nested structure. Taking the four-layer structure as an example, it includes: four sequentially nested resonator units , specifically: the bottom plate 1, the first shell 2, the second shell 3, the third shell 4, the fourth shell 5, the first partition 6, the second partition 7, the third partition 8, the first partition Four partitions 9, the first neck short tube 10, the second neck short tube 11, the third neck short tube 12 and the fourth neck short tube 13, wherein: the inner diameter and height are arranged on the bottom plate in order from inside to outside Enlarged housing, the upper end of the housing is sealed with a partition provided with a short neck tube.
[0027] The centers of the bottom plate, the shell, the partition, and the short neck tube are on the same straight line...
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