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Joint effect evaluation method and system for anti-noise earplugs and earmuffs in workplace

A workplace, combined action technology, applied in measuring devices, instruments, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as poor protection and achieve the effect of removing subjective errors

Pending Publication Date: 2021-12-10
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the low-frequency noise workplace chooses hearing protectors with good protection against high-frequency noise, the protection effect is often not good.

Method used

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  • Joint effect evaluation method and system for anti-noise earplugs and earmuffs in workplace
  • Joint effect evaluation method and system for anti-noise earplugs and earmuffs in workplace
  • Joint effect evaluation method and system for anti-noise earplugs and earmuffs in workplace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment discloses a method for evaluating the joint effect of noise-proof earplugs and earmuffs in a workplace, including:

[0059] Measurement of insertion loss in each frequency band of noise-proof earplugs: used to evaluate the protective effect of earplugs alone, and obtain the frequency band with good noise blocking effect.

[0060] Performed in a reverberation chamber using the B&K Artificial Head Simulator 4128C. During the test, the noise is first emitted from the non-directional sound source sounding body, and the PLUSE acoustic software is used to measure the sound pressure level of each frequency at the microphone when the artificial head simulator is not placed and the hearing protector is closed. Then insert the earplugs into the ear canals of the right ear simulator (4158) and left ear simulator (4159) of the artificial head, and ensure that the earplugs are located at the center of the end face of the microphone. Play the same noise, and use the ...

Embodiment 2

[0085] This embodiment discloses the application of the above method in the protection of hearing protectors in pumped storage power stations, specifically:

[0086] Noise detection of hydraulic turbines in pumped storage power stations:

[0087] In order to fully understand the noise situation of the pumped storage power station and evaluate the effectiveness of its noise protection equipment, the noises of different working conditions and places of a pumped storage power station were measured. The Danish B&K company's 2238 precision integral sound level meter is selected for the fixed-point noise intensity detection in the workplace. It is certified by the Institute of Metrology every year and calibrated before each use. During the test period, all units were operating normally, and protective facilities such as ventilation were operating normally. The operating results of each unit under the tested power generation and pumping conditions are shown in Table 5 and Table 6. ...

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Abstract

The invention provides a joint effect evaluation method and system for anti-noise earplugs and earmuffs in workplace. The method comprises the following steps: measuring insertion loss of each frequency band of an anti-noise earplug; measuring the insertion loss of each frequency band of an anti-noise earmuff; and measuring the insertion loss of each frequency band when the anti-noise earmuff and the earplug are worn at the same time. The artificial head simulator is used for measuring the insertion loss of the earplug, subjective errors are removed, and the method and system are simpler and more convenient.

Description

technical field [0001] The invention belongs to the technical field of noise assessment, and in particular relates to a joint action assessment method of noise-proof earplugs and earmuffs in a workplace. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Noise is a common occupational disease hazard factor in the workplace, which can lead to occupational diseases such as noise deafness in severe cases. Therefore, workers need to wear hearing protection equipment to protect their hearing. [0004] Currently commonly used hearing protection products are noise-proof earplugs and noise-proof earmuffs. In high-noise workplaces, noise-proof earplugs or noise-proof earmuffs alone cannot provide effective protection. Noise-proof earplugs and earmuffs need to be worn together. The sound attenuation of earplugs in the national standard is a subjecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01H17/00
CPCG01M13/00G01H17/00
Inventor 窦丹丹巩泉泉王坤张国英张兆波陈超李方伟崔福兴侯亚琴谢连科
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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