Broadband ultra-light transparent asymmetric sound transmission structure
A transmission structure, asymmetric technology, applied in the field of acoustics, can solve the problems of heavy weight, poor asymmetric transmission effect, bandwidth limitation, etc., and achieve the effect of light weight
Inactive Publication Date: 2018-04-24
NANJING UNIV
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Problems solved by technology
However, metamaterials suitable for air acoustic waves are usually composed of solid resonant cavities, which not only have a large weight, but also their operating frequency depends on the resonant frequency of the cavity, which limits the bandwidth of asymmetric acoustic transmission devices based on metamaterials, especially in At high frequencies, the asymmetric transmission effect is poor
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as figure 1 with figure 2 As shown, the broadband ultra-light and transparent asymmetric sound transmission structure of the present invention includes a body 1 in a tubular structure, preferably a rectangular tubular structure, and a reflector 2 is arranged inside the body 1, and the reflector 2 is arranged along the body 1. The shape of the longitudinal section of the axis is a polygon, and the polygon includes a rectangle and an isosceles triangle, and the apex angle of the triangle is α, and the angle of the α is 75-121°, preferably 90°, and the base of the triangle is the same as that of the rectangle. The length is the same side, and the reflector 2 includes a transparent casing and xenon gas inside the casing.
[0022] In the present invention, the material of the casing is a light-transmitting light film, and the device preparation needs only to ...
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The invention discloses a broadband ultra-light transparent asymmetric sound transmission structure, which comprises a body of a tubular structure, wherein a reflector is arranged in the body, and thelongitudinal section of the reflector along an axis of the body is in a shape of polygon, the polygon comprises a rectangle and an isosceles triangle, a base of the triangle and a long edge of the rectangle are the same, and the reflector comprises a transparent shell body and a xenon gas in the shell body. The broadband ultra-light transparent asymmetric sound transmission structure takes the air as a background material, and the structure contains the xenon gas and does not use any solid material, so that the whole structure is very light in weight and completely transparent to visible light; in addition, the broadband ultra-light transparent asymmetric sound transmission structure is based on the utilization of a Snell's law, and does not use any resonant structure, thereby being capable of realizing asymmetric sound transmission in an extremely wide frequency band.
Description
technical field [0001] The invention relates to a broadband ultralight and transparent asymmetric sound transmission structure, which belongs to the field of acoustics. Background technique [0002] Early asymmetric acoustic transmission devices were based on the nonlinear realization of acoustic materials, so their asymmetric acoustic transmission frequency range was narrow and the energy transmission efficiency was low. With the development of acoustic metamaterials, the performance of asymmetric acoustic transmission structures has been greatly improved in terms of device size, transmission efficiency, and operating frequency band. However, metamaterials suitable for air acoustic waves are usually composed of solid resonant cavities, which not only have a large weight, but also their operating frequency depends on the resonant frequency of the cavity, which limits the bandwidth of asymmetric acoustic transmission devices based on metamaterials, especially in At high freq...
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Login to View More IPC IPC(8): G10K11/20
CPCG10K11/20
Inventor 胡洁梁彬邱小军
Owner NANJING UNIV