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Rib type acoustic diffuser and diffusing system comprising same

A diffuser and acoustic technology, applied in the direction of sound-generating devices, instruments, etc., can solve the problems of low speech clarity, high reverberation time, and small sound attenuation, so as to increase speech clarity, good noise reduction effect, and reduce reverberation the effect of time

Active Publication Date: 2012-01-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a solution to solve the problem of small sound attenuation along the direction of long space length in a long space and the problem of low speech intelligibility due to high reverberation time Rib-shaped acoustic diffuser and diffusion system comprising the rib-shaped acoustic diffuser

Method used

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  • Rib type acoustic diffuser and diffusing system comprising same
  • Rib type acoustic diffuser and diffusing system comprising same
  • Rib type acoustic diffuser and diffusing system comprising same

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 7 This specific embodiment is described. In this specific embodiment, a rib-shaped acoustic diffuser includes a first main rib (1), a second main rib (2), a third main rib (3), a fourth main rib (4), ..., the Nth -1 Main rib (N -1 ) and the Nth main rib (N), each main rib is arranged in parallel in the same plane or in the same curved surface.

specific Embodiment approach 2

[0011] Specific implementation mode two: combination figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 7 Describe this specific embodiment, the difference between this specific embodiment and specific embodiment one is: the first main rib (1), the second main rib (2), the third main rib (3), the fourth main rib ( 4), ..., the Nth -1 Main rib (N -1 ) and the Nth main rib (N) are equal in distance between each main rib, and the distance between each main rib increases with the decrease of the frequency of the sound diffused, and the width D1 and thickness D5 of each main rib also increase with the decrease of the frequency of the sound diffused . In the diffused sound frequency range of 100-4000 Hz, the distance between each main rib is 100-500 mm, the width D1 of each main rib is 30-200 mm, and the thickness D5 of each main rib is 30-500 mm. mm.

specific Embodiment approach 3

[0012] Specific implementation mode three: combination figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 7 Describe this specific embodiment. The difference between this specific embodiment and specific embodiment 1 or 2 is that each main rib has sub-ribs, that is, the first main rib (1) has a first sub-rib (1-1), and the first main rib (1) has a first sub-rib (1-1). The second main rib (2) has the second sub-rib (2-1), the third main rib (3) has the third sub-rib (3-1), and the fourth main rib (4) has the fourth sub-rib (4-1). 1), ..., the Nth -1 Main rib (N -1 ) has the Nth -1 sub-rib (N -1 -1) and the Nth main rib (N) has an Nth sub-rib (N-1), the distance between each main rib and its corresponding sub-rib is 1 / 2 to 1 / 5 of the distance between each main rib, and each sub-rib The width D2 and thickness D6 of the ribs are also one-half to one-fifth of the width D1 and thickness D5 of each main rib.

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Abstract

The invention provides a rib type acoustic diffuser and a diffusing system comprising the same, relating to a rib type acoustic diffuser used for reducing noise pollution in long space and a diffusing system comprising the rib type acoustic diffuser, and solving the problems that the acoustical attenuation decreases in long space along the length direction of long space and that the articulation is low due to high reverberation time. The rib type acoustic diffuser in the invention comprises N main ribs, the main ribs are arranged in a same plane or curve in parallel. The diffusing system comprising the rib type acoustic diffuser in the invention also comprises N loudspeakers. In the invention, acoustical attenuation is increased along the length direction of long space, thus reducing total noise (including conditions of single sound source and multiple sound sources) in the long space, having important engineering application value, reducing noise in long space and enhancing articulation of a broadcasting system in long space.

Description

technical field [0001] The invention relates to the field of noise pollution control, in particular to a rib-shaped acoustic diffuser for reducing noise pollution in a long space and a diffusion system comprising the rib-shaped acoustic diffuser. Background technique [0002] A long space generally refers to a space whose length is six times greater than its width and height. At present, in long spaces, such as subway stations, corridors, and transitional spaces of some large public buildings, the sound field cannot be calculated by classical theory because its length is much greater than its width and height. Noise pollution is often a serious problem in such spaces, the most typical example is the speech intelligibility of the public address system in subway stations, low intelligibility will not only affect the normal travel of passengers, but more importantly, in emergency situations Misunderstanding the escape information of the broadcast system will cause immeasurable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/16
Inventor 康健
Owner HARBIN INST OF TECH