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Multifunctional noise-abatement equipment for rooms

A noise reduction device and multi-functional technology, which can be applied to floors, building components, sound insulation, etc., and can solve problems such as poor air permeability

Inactive Publication Date: 2009-02-25
曹国斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thicker the felt, the greater the noise reduction coefficient, but the poorer its air permeability

Method used

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  • Multifunctional noise-abatement equipment for rooms
  • Multifunctional noise-abatement equipment for rooms
  • Multifunctional noise-abatement equipment for rooms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Multifunctional noise reduction devices for rooms such as Figure 1 to Figure 3 As shown, it includes a flat rectangular box 1, the box 1 includes a support 5 and a sound-absorbing material 2 covered on the support 5, and the sound-absorbing material 2 can be a flocking material, including man-made fibers, animal hair, plant fibers etc., the hairy side is in the inside of the box body 1, and a longitudinal partition 6a is arranged in the middle of the box body 1. This partition plate 6a divides the space in the box body into two chambers 8, 9 that communicate with each other before and after. A number of transverse partitions 6b make the front and rear chambers separate and layered, and strip-shaped air inlets 7 and air outlets 3 are respectively opened on the front and rear walls of the box body 1, and the air inlet 7 and the air outlet 3 are respectively connected to the front and rear sides of the box body. The air inlet 7 and the air outlet 3 are arranged so that af...

Embodiment 2

[0024] The box body of the present invention can also adopt plate to make box-type support 5, paste sound-absorbing material 2 in support 5, refer to Figure 4 .

Embodiment 3

[0026] Another structure of the present invention is as Figure 5 As shown, the shape of the right side 10 of the box body is a wedge shape protruding from the middle, which is more conducive to noise reduction.

[0027] It is known from physics that the speed of sound in the air is V=331 m / s, and the sound wave vibration spectrum sensitive to the human ear is 20Hz to 20KHz, and their wavelength ranges from 16.5m to 0.0165m. The input of the low frequency 500Hz = 0.662 meters, the noise of this frequency is more harmful to the human body than the high-end noise of the spectrum.

[0028] From the sound wave interference experiment, it is shown that: the same sound source is branched into left and right two propagation channels, which converge at the same exit. When the path difference between the two sides is equal to an even multiple of half a wavelength, the converging sound at the exit is enhanced; when the half wavelength is entered When the odd multiple of , the sounds ca...

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Abstract

The invention discloses a multifunctional muffler device for rooms, which is characterized in that the device comprises a slablike case composed of a bracket and muffling material covered on the bracket, the case is internally provided with a longitudinal partition board and a transverse partition board, the longitudinal partition board divides the interior space of the case into a front and a rear passage mutually communicated, the transverse partition board delaminates the front and the rear passage, the front and rear walls of the case are respectively provided with an air inlet and an air outlet in the form of strips, the air inlet and the air outlet are respectively communicated with the front and the rear passage of the case. As the multifunctional muffler device of the invention adopts the muffling material and ventilation structure, the device can not only have the effects of noise insulation and noise elimination but also have the effect of natural ventilation when the device is installed on a window and other glass windows are closed, thereby solving the problem of no meeting noise insulation, noise elimination and natural ventilation in the prior art simultaneously.

Description

technical field [0001] The invention belongs to a noise reduction device, in particular to a multifunctional noise reduction device used in a room. Background technique [0002] In modern cities and on both sides of roads (roads and railways), noise has long become a public nuisance. With the improvement of people's living standards, people have put forward higher requirements for indoor living and working environments. Among them, sound insulation, noise reduction, and noise reduction issue has received increasing attention. In terms of room sound insulation and noise reduction, it is mainly the sound insulation and noise reduction of windows. At present, the measures taken for sound insulation of windows are to use the property of window glass itself to reflect sound waves for sound insulation. In order to further enhance the sound insulation effect, windows can also be made into laminated glass. It is a contradiction between the sound insulation function of the window a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/74E04B1/82E04B1/84
Inventor 曹樱曹赟曹国斌
Owner 曹国斌
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