In a previous work of mine, I have measured the sound pressure level (SPL) of three different industries (steel, aluminium, garments) using a digital sound level meter (SL-5868 P). The SPL were taken at three different places (entrance, premise, and inside) in each industry during three different time periods, starting from morning to evening. For each data, I took three recordings and the mean values were presented. Finally, as I found all the sound levels were much above the standard prescribed by environmental regulating authorities of several countries, I wrote that the workers' are exposed to high noise levels which is harmful for their health.
But after being rejected from a journal, I got to know that it was entirely environmental noise and if I want to discuss occupational noise, I need to follow the ISO 9612:2009 measurement methods.
It has been accepted in a journal (after changing the title and some modifications in write-up) lately. But my question is, isn't the SPL related to the actual noise level measurements that the workers' are being exposed continuously?
The assessment of occupational noise starts with the determination (measured or calculated) of the sound levels the workers are exposed to.
The criteria however depend strongly uopn the type of work and the type of industry. Criteria for environmental noise are usually aimed at the protection of dwellings; therefore distinction is made in day, evening and night (sleep!).
In industry hearing loss is a basic item (risk above 80-90 dB(A)). Next come speech communication, and concentration. Criteria are in the magnitude of 40-60 dB(A).
Steel and aluminium industry can be very noisy, with high risk of hearing loss without effective measures like hearing protection.
Very Truly said by Dr. Evert. When we talks about occupational noise, it means the noise at which workers are expose to. So, I think there is a difference between environmental noise and occupational noise. But still I am not sure, Is there any different normative for both of them.
Sirajus Salehin could you please share your paper with me at [email protected]
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