Broadband ventilation and sound insulation window unit structure and application thereof

Abstract

The invention relates to a broadband ventilation and sound insulation window unit structure and application thereof. The broadband ventilation and sound insulation window unit structure comprises an inner resonant cavity (1), a hollow pipe (2) and a thin-wall shell (3); the outer wall of the hollow pipe (2) is fixedly connected with the inner resonant cavity (1); the outer edge of the inner resonant cavity (1) is sleeved with the thin-wall shell (3); the inner resonant cavity (1) comprises a plurality of layers of hollow cylinders which are arranged on the outer wall of the hollow pipe (2), are stacked up and down and have the same structure and size; the outer edge of the bottom of each layer of hollow cylinder is provided with a horizontal partition plate (11) of an annular structure; and each layer of horizontal partition plate (11) is provided with a circumferential partition plate (4) and a radial partition plate (5) which are used for dividing each layer of resonant cavity into a plurality of resonant spaces. Compared with the prior art, the structure has the advantages that the sound insulation effect is improved, the working frequency band is wide, effective sound absorption can be improved while efficient sound insulation is achieved, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of noise control equipment, in particular to a broadband ventilation and sound insulation window unit structure and its application. Background technique [0002] Simultaneously achieving sound insulation and free flow of gas remains a major challenge in acoustic engineering. The sound barrier will hinder the transmission of airflow, and the traditional ventilation barrier is generally designed as a winding path, but while ensuring sufficient noise reduction, it will also bring a large pressure difference, further reducing the ventilation effect. Acoustic metasurfaces, an area of ​​increasing interest, have demonstrated their unparalleled ability to tune acoustic wave interactions and offer researchers unprecedented opportunities in acoustic field manipulation at the deep subwavelength level, such as subwavelength focusing / Imaging, one-way sound transmission, unusual refraction and reflection and compact s...

AI Technical Summary

Problems solved by technology

Although these designs have made significant progress in dealing with broadband problems, the bandwidth is still limited, usually less than one octave if evaluated by the range at which more than 90% of the incident energy is blocked

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