Rank: New forum user
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I am after some information as I am confusing myself with all the information on the internet. I have a workplace that does instructional learning on the use of lathes (Metal cutting). I have found a report stating
that they recorded 89dB but there is no other information. I understand anything over 85dB you have to have ear protection based on the average exposures (is anyone able to put that into simple talk). I visited the area and observed the noise was only generated for short periods and the lesson lasted for around 1 hour.
The problem I have is they have been instructed to wear ear defenders which the instructor dislikes as he is not heard by the students. I have looked into ear plugs but want to know what others think.
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Rank: Super forum user
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The HSE published a ready reckoner to determine exposure http://www.hse.gov.uk/noise/dailyexposure.pdf based on noise level and duration One hour at a noise level of 89 db(A) gives a points score of 32 equivalent to 80 dB exposure which puts you at the action level for providing instruction & information and making hearing protection available As you have a reading opf 89dB(A) typically a protector with an SNR value of 20 or less shoud be adequate if your equipment has a higher SNR (>20) it may explain the problems with communication Personally I would start with fresh measurements of level and duration especially if the room layout or equipment has altered since the date of the report you found and work from there.
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 1 user thanked Roundtuit for this useful post.
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