Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition

A technology of noise measurement and muffler tube, which is applied in the field of acoustics, can solve the problems of providing reliable basis, difficult measurement, and large noise impact, and achieves the effects of superior sound insulation performance, simple measurement, and small size

Inactive Publication Date: 2009-08-05
TONGJI UNIV
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Problems solved by technology

[0002] There are many noise sources in large-scale factories and mines, which are widely distributed, have high sound levels, and have a great influence on each other. In many cases, it is difficult to identify the contribution of each noise source through direct measurement by a single microphone, and cannot provide a reliable basis for governance measures. The sound intensity method is used in Under certain conditions, the influence of background noise can be suppressed, but the equipment is expensive, and it is difficult to carry out effective measurement in the scene with strong reverberation field

Method used

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  • Acoustical insulation sound-deadening pipe used for on-site noise measurement and recognition

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Embodiment 1

[0019] Embodiment 1: the following parts are pressed figure 1 Those skilled in the art can successfully implement the connection in the manner shown. The elastic connection section 1, the wall plate composed of multi-layer aluminum plate damping light sound insulation structure 3, the bottom plate 8 composed of multi-layer aluminum plate damping light sound insulation structure are connected to form a barrel-shaped cavity 7, and the multi-layer aluminum plate damping The bottom microphone hole 5 is set in the middle of the bottom plate 8 of the lightweight sound insulation structure, and the elastic sealing sheet 6 for the microphone hole is installed. The elastic connection section 1 in the cavity shows that it is close to the first sound-absorbing sponge 2, and the lightweight sound insulation structure is damped by the multi-layer aluminum plate. The surface of the wall plate 3 and the bottom plate 8 of the multi-layer aluminum plate damping light-weight sound-insulating st...

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Abstract

The invention belongs to the technical field of acoustics, in particular to a sound-insulating and muffling tube for on-site noise measurement and identification. It is composed of elastic connecting section, sound-absorbing sponge, wall plate, sound-absorbing sponge, bottom microphone hole, sealing sheet, cavity, and bottom plate. The elastic connecting section, wall plate, and bottom plate are connected to form a cavity. The inner wall of the cavity is close to the sound-absorbing sponge , the bottom microphone hole is in the middle of the bottom plate of the multi-layer aluminum plate damping light-weight sound insulation structure, and the elastic sealing sheet of the microphone hole is on the outside of the bottom microphone hole. When in use, it only needs to stick the present invention on the surface of the noise source to be measured, and the microphone extends into the middle of the cavity from the bottom microphone hole. The invention has the advantages of simple device, convenient processing, lightness and portability, excellent sound insulation performance, and can effectively measure and identify noises on the scene of multiple noise sources.

Description

technical field [0001] The invention belongs to the technical field of acoustics, and in particular relates to a sound insulation and muffler pipe used for on-site noise measurement and identification. Background technique [0002] There are many noise sources in large-scale factories and mines, which are widely distributed, have high sound levels, and have a great influence on each other. In many cases, it is difficult to identify the contribution of each noise source through direct measurement by a single microphone, and cannot provide a reliable basis for governance measures. The sound intensity method is used in Under certain conditions, the influence of background noise can be suppressed, but the equipment is expensive, and it is difficult to carry out effective measurement in the scene with strong reverberation field. Contents of the invention [0003] The purpose of the present invention is to propose a portable, high-sound-insulating performance, and a simple-insta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H1/00
Inventor 俞悟周
Owner TONGJI UNIV
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