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Triangular array-based closely-piled sound absorbing and isolating fiber material

A fiber material, triangular technology, applied in the field of sound-absorbing and sound-insulating fiber materials

Inactive Publication Date: 2016-01-27
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are no phononic crystals related to fiber materials and formed in the form of triangular arrays.

Method used

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  • Triangular array-based closely-piled sound absorbing and isolating fiber material
  • Triangular array-based closely-piled sound absorbing and isolating fiber material

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Embodiment Construction

[0013] The invention provides a triangular array densely packed sound-absorbing and sound-insulating fiber material. The fiber material is formed by periodically arranging circular fibers in the form of a triangular lattice. The lattice constant of the fiber is a vs fiber diameter d equal. The present invention uses straight and round fibers arranged in parallel and closely. By adjusting the diameter of the fiber, the selective blocking of sound waves can be realized artificially and controllably.

[0014] The present invention is realized based on the principle that the fibers are periodically arranged in the form of a triangular lattice in the matrix, and when the sound wave propagates in the composite material, it couples with this periodic structure, thereby forming a pass band and a forbidden band for sound wave propagation. The sound waves falling in the forbidden band will be completely blocked.

[0015] The fibers are arranged in the matrix material in the form of a...

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Abstract

Provided is a triangular array-based closely-piled sound absorbing and isolating fiber material. The fiber of the invention is straight and in parallel arrangement, the fiber diameter is uniform, and a band gap can be produced in some sound wave frequencies through the change of the fiber diameter to completely absorb and isolate sound. The fiber material can be used in sound absorbing and insulating and noise reducing occasions of specific sound wave frequencies.

Description

technical field [0001] The invention relates to the field of fiber materials, in particular to a triangular array densely packed sound-absorbing and sound-insulating fiber material. Background technique [0002] The way people deal with noise ranges from blocking the sound source in the early stage to choosing lightweight, flexible, and efficient sound insulation materials for multi-directional noise reduction, but none of them can achieve targeted sound isolation. Because the sound frequency that the human ear can receive is between 20Hz-20kHz, and the uncomfortable noise happens to be in this frequency domain, what can be done is to eliminate, reduce or block the noise source. Whether the noise from a specific frequency band can be selectively blocked or eliminated, or even adaptively selected and reduced, is a problem that researchers in materials science have been paying attention to and trying to solve. The theory of phononic crystals provides a basis and example for s...

Claims

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Application Information

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IPC IPC(8): G10K11/162
Inventor 杨树于伟东张菊芳阮腾蛟许夏昕
Owner JIAXING UNIV
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