Ultra-open type efficient ventilation sound absorption unit and sound absorber

Abstract

The invention discloses an ultra-open type efficient ventilation sound absorption unit. The unit comprises a first shunt tube resonant cavity and a second shunt tube resonant cavity which are arrangedsymmetrically front and back side by side, wherein each shunt tube resonant cavity is composed of an inner frame and an outer frame; each shunt tube resonant cavity is integrally concentric-square-shaped; cover plates are arranged on the left sides and right sides of the first shunt tube resonant cavity and the second shunt tube resonant cavity, so that sound absorption channels are formed amongthe inner frames and the outer frames; and horizontal sound absorption narrow slits are further formed in the first shunt tube resonant cavity and the second shunt tube resonant cavity. The inventionalso discloses an ultra-open type efficient ventilation sound absorber. Each sound absorption unit forms a rigid loss oscillator similar to a spring, the sound absorber is installed in an open air flow channel, and efficient low-frequency absorption (more than 95%) and ventilation (wind speed ratio is larger than 80%) can be achieved, so that the existing technical bottleneck that the flow channelneeds to be completely sealed by an acoustic metamaterial to achieve perfect sound absorption but the ventilation cannot be realized is overcome, and the sound absorption unit and the sound absorberare particularly suitable for the noise control of fluid-filled environment such as an air conditioner, an exhaust hoods and a flow passage.

Description

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AI Technical Summary

Benefits of technology

This new design uses two small tubes called “sub” tunnels inside another type of material called“microcavity”. These microstructures created by these tiny holes allow gas or liquid molecules to pass through while still being able to absorb sounds effectively at very different frequency levels than previous designs without requiring complete sealing up any space around them.

Problems solved by technology

The technical problem addressed in this patents relates to improving the efficiency of sound reduction systems used during quiet periods without compromising on comfort levels when dealing with fluctuating fluids like water vapor. Existing absorbers suffer from limited suction capacity while also requiring complete sealing of the flow path leading to poor sound quality under certain conditions.

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