Disgusting mechanical testing tool
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I have a question: when checking the condition of machinery, a stethoscope is often used. Are there any current laws or regulations that establish standard requirements for such primitive tools as listening needles? And what are the design specifications for the tuning needle? Will using such a tool lead to a serious occupational disease—noise-induced deafness? ? ? ? Those who work in such jobs, have you been exposed to these occupational hazards?
Reply to 1# zgflxz: Haha, no. Have you heard about that doctor who was disabled by a stethoscope?
It doesn’t exist, as long as it’s used properly.
Experienced fitters sometimes find a stethoscope to be more effective than testing equipment; there are no fixed standards, and most fitters make their own stethoscopes as long as they work well. I’ve also never heard of anyone developing an occupational disease from using stethoscopes.
If it reaches this state, the device is basically unusable; there’s no point in using its needle anymore!
I know some workers who are engaged in mechanical maintenance or inspection; they suffer from severe hearing loss, especially in the high-frequency range. Some of them can stand next to fans without really noticing the noise produced by those fans, although their hearing in the speech frequency range is normal. I think you wouldn’t even be able to detect any noise even when standing next to the fan; it seems like a sound detector wouldn’t be very useful either. Using such a tool to check the equipment probably wouldn’t reveal any issues.
Reply to 2# Dichlorvos: The stethoscope used by doctors and the listening rod used by mechanics operate on the same principle, but they are used in different environments. The stethoscope of a doctor picks up murmurs; these sounds are very faint, and of course they do not cause any damage to the doctor’s hearing ； However, the listening sticks used in industrial maintenance are placed on the casings, shafts, and other components of rotating fans and water pumps. The noise level of these devices is usually above 85 decibels; therefore, the sound that reaches the ears of the maintenance workers through these listening sticks is likely to be much higher than 85 decibels. Therefore, the hazards of sound-stick listening cannot be compared to the benefits of a stethoscope.
I’ve been doing maintenance work for 20 years now, and my hearing hasn’t declined at all; in fact, it’s even sharper than that of people in other industries. When regularly inspecting pumps, fans, air compressors, etc. with a power range of around 30–100 kilowatts, it is necessary to use a sound detection rod; these are quite simple devices. Usually, people just use steel pipes or rods of appropriate length and diameter that are readily available, and if no such tools are at hand, a screwdriver will do just as well. One must take care of their hearing on their own; try not to spend too much time in areas with loud equipment. During inspections and on-site repairs that are necessary, it is important to keep moving the mouth ； Talking, humming, being in a half-asleep state, chewing gum, using earplugs, and so on.
What was said upstairs makes sense; sometimes, before listening, it’s necessary to press the thumb between the ear and the earpiece to ensure safety
Reply to 8# sunyu_98: I wonder if you’ve had a medical check-up for your job It’s a pure tone test. It is different from a regular medical check-up. Occupational injuries cause damage in the high-frequency range; the damage is severe, but it does not affect everyday hearing. Only specialized equipment can detect it.
That only shows that the working environment of the original poster is extremely harsh; perhaps others work in an environment with 50 decibels, while they have to work in an environment with over 100 decibels using earphones