Device for lowering voice

Abstract

The invention discloses a device for lowering a voice. The device comprises a support frame and a noise reduction cavity formed in the support frame, wherein the noise reduction cavity is formed by enclosing a bottom plate and a shell which is buckled on the bottom plate in a covering manner; all of the bottom plate, the shell, a movable end cover and a closed end cover have hollow-cavity structures; and the absolute vacuum degree of the hollow cavities is 0KPa to 30KPa. A sounding device such as a cutter can be arranged in the noise reduction cavity, a power switch is arranged outside the noise reduction cavity; and in a using process, the four walls of the noise reduction cavity have the hollow-cavity structures, and the absolute vacuum degree of the hollow cavities is 0KPa to 30KPa. Thesounding device is positioned on the outer wall and is located in an environment that the absolute vacuum degree of the hollow cavity is 0KPa to 30KPa, and the cutting noise cannot be greatly spread;and therefore, the noise can be reduced to the maximum extent, and the physical and mental health of operating workers are facilitated; and not only that, in the cutting process, produced dust can beeffectively shielded in the hollow cavities, so that pollution caused by the dust is reduced.

Description

technical field [0001] The present invention relates to mechanical manufacturing auxiliary equipment, in particular, to a device for reducing sound. Background technique [0002] Noise pollution, air pollution and water pollution constitute the three major pollution sources today. If people work under the environment of 104dB noise, workers with varying degrees of deafness account for 32%, and the incidence rates of heart disease, high blood pressure, and neurasthenia are several times higher than those of ordinary workshop workers. Noise seriously pollutes the environment and has become one of the major public hazards that endanger people's health. my country's GBJ87-85 stipulates: 8 hours of work, the noise limit is 90dB. The noise hygiene standards in developed countries are more stringent. [0003] Cutting machine is currently commonly used mechanical roughing machine, but this kind of machine has a big disadvantage, that is, it will make harsh noise when cutting, whi...

AI Technical Summary

Problems solved by technology

[0003] Cutting machine is currently commonly used mechanical roughing machine, but this kind of machine has a big disadvantage, that is, it will make harsh noise when cutting, which seriously endangers the health of production workers. Acoustic holes or sound-absorbing seams, and flexible gaskets are added to the connection between the saw blade and the cutting machine to damp the propagation of sound waves generated by friction and impact on the substrate, reduce audio resonance, and reduce part of the noise. However, it is still up to less than safe standard

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