A low-frequency broadband sound-absorbing metamaterial structural unit
By using inclined baffles and through-hole design in the sound-absorbing metamaterial structural unit, the problem of narrow mid-frequency band for low-frequency noise control of Helmholtz resonator is solved, achieving efficient sound absorption effect in the low-frequency broadband and simplifying the processing difficulty.
CN224437167UActive Publication Date: 2026-06-30XIAN HUISHENG ELECTROMECHANICAL TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN HUISHENG ELECTROMECHANICAL TECH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Traditional Helmholtz resonators suffer from a narrow operating bandwidth in low-frequency noise control, which limits their application in practical engineering.
Method used
It adopts a cavity structure enclosed by multiple walls, with inclined partitions and through holes inside. The sound waves generate different acoustic impedances and incident angles on different sides of the cavity, which enhances the sound absorption effect. The interconnected cavities improve utilization and simplify the manufacturing process.
Benefits of technology
It achieves high-efficiency sound absorption in the low-frequency broadband, with a bandwidth of more than 2 octaves, simplifies the processing, and improves the overall performance of the sound-absorbing material.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224437167U_ABST
Abstract
This invention provides a low-frequency broadband sound-absorbing metamaterial structural unit. The structural unit is a cavity enclosed by multiple walls. Air inlets are distributed on the top plate of the cavity. The internal space of the cavity includes a main chamber, which is composed of at least one secondary chamber arranged in a horizontal plane. Each secondary chamber is divided into two sub-chambers by a partition, and an inclined partition is placed between the two sub-chambers. The top edge of the inclined partition is located on the top surface of the secondary chamber, and through holes are formed on the inclined partition. This extremely simple structural form achieves high-efficiency low-frequency broadband sound absorption.
Need to check novelty before this filing date? Find Prior Art