A Gradient Slit Double Porosity Sound Absorbing Device and Its Application

A sound-absorbing device and double-aperture technology, which is applied in the direction of sound-generating devices, instruments, floors, etc., to achieve the effects of simple structure, improved low-frequency sound absorption capacity, and excellent sound absorption performance
CN109707059BActive Publication Date: 2020-05-19XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2020-05-19

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Abstract

The invention discloses a gradient slitting double-porosity sound absorbing device and application thereof. The gradient slitting double-porosity sound absorbing device comprises a seamed porous material plate and rigid backing; the seamed porous material plate is arranged on the rigid backing, a plurality of gradient slits are formed in the seamed porous material plate periodically at intervals,and the slitting direction of the gradient slits is perpendicular to the seamed porous material plate. The gradient slitting double-porosity sound absorbing device is simple and practical in structure, has a superior sound absorbing property and a flexible sound absorbing adjusting function in a low frequency band, a medium frequency band and a high frequency band, and has good and wide application prospects.
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Description

technical field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a gradient slit double-porosity sound-absorbing device and its application. Background technique

[0002] The existing sound-absorbing panel is a plate-shaped material with sound-absorbing and noise-reducing functions, and is mainly used in scenes such as concert halls, museums, libraries, and inner walls of vehicles. Traditional sound-absorbing panels mainly absorb sound in two ways: one is to use porous fibers or foam materials for sound absorption, and the sound absorption coefficient increases with the increase of frequency, which is suitable for high-frequency sound absorption; the other is to use The micro-perforated plate of the cavity is used for sound absorption, which can have resonance sound absorption peaks at lower frequencies, and is suitable for middle and low frequency sound absorption. It is difficult for the above two methods of sound-abs...

Claims

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