Bipin Gautam
HSEQ Manager
Dear All,
To assess the potential risk from noise, I am planning to conduct a walkabout survey to identify possible activities/areas of significant noise exposures and to determine if additional monitoring is necessary.
Do you have any idea with this regards.
Kind Regards,
Bipin Gautam

From Oman
raghuvaran chakkaravarthy

Environmental, Health and safety
Dear Bipin,
Noise Hazard it's one of the big concern and big challenge in our work place international level. Just follow the below links which was more stringent OSHA was given a brief on below links how to conduct noise survey's? Who should be conduct survey's? etc..,,,
Noise and Hearing Conservation Technical Manual Chapter: Section III: How do I evaluate noise exposure? <link updated to site home>
Noise and Hearing Conservation Technical Manual Chapter: Evaluation (App III:A-3) <link updated to site home>
<link outdated-removed> ( Search On Cite | Search On Google )
Note: Attached the OSHA noise survey & analysis report AND Measurement of workplace noise pdf files for your reference.
Hope its helps. keep on touch. . .

From United States, Fpo

Attached Files
File Type: pdf Noise Surveys Data Analysis.pdf (283.3 KB, 402 views)
File Type: pdf Noise - Measurement of Workplace Noise.pdf (1.44 MB, 422 views)


AGM EHS and Project Management
Dear Bipin,
In addition to what Mr. Raghu has explained, you may refer the Factories Act.
It is a good idea to conduct a walk through survey.
It will drive your attention to noisy areas.
Factories Act has considered 90 dBA noise level and TLV limit for 8 hours exposure.
Once you identify potential for improvement, you have to control the noise at its source, by engineering controls which include ...
1. Acoustic Enclosures
2. Good Maintenance of machines
The another way is administrative controls where reducing the noise at its source is not possible.
1. Isolation: Isolate the noisy area
2. Job rotation
You may conduct audiometry tests of the employees with increased frequency and compare results with the last tests.
If in case you need any more inputs pl let me know.
Thanks & Regards,

From India, Nasik
Dear Sudhir,
In addition to the points you have mentioned above, where the noisy area cannot be avoided, like working in quarries, or surrounded by noisy machines like big compressors, DG sets, it is safe to use personnel protective equipments, like ear muffs, ear plugs etc for the personnels working those areas.

From India, Mumbai

AGM EHS and Project Management
Dear Murdhar,
DG set is suposed to have aucoustic enclosure.
If both the compressor or DG set are in one room, you may think of acoustic room for both of them together.
PPEs are to be used as a last defence.
You should not rely on only PPEs
Thanks & Regards,

From India, Nasik
Dear Sudhir,
Acoustic enclosure for noisy machines is only for the noise preventing to external persons and not to the persons who are working near the machines. Operators, Maintenance technicians who have to visit the machines often to check their normal running cannot avoid the noise generated by these. Hence, it is imperative, that they have to use personnel protective equipments like ear muffs, ear plugs etc.
Generally during the design stage of specifications of these machines itself, noise permissible has been indicated to be less than 90 DB (ninety decibels). But due to aging factors, and due to some faulty design or improper balancing etc (there are so many factors to contribut to high level of noise than the prescribed ones) these high noise or vibrations occurs. Its the responsibility of operators, maintenance technicians to identify the cause and eliminate them.
Hope this clarifies .

From India, Mumbai

Working with NGO
Sudhir is right that noise level has to be controlled at source. If for any reason you can not reduce noise level to 90dB, then the Factory Rules provide to curtail the exposure period - half time for each 5 dB rise i.e. if it is 95 dB, only 4 hr work in that para and if it is 100 dB, 2 hr exposure is allowed.This is just on paper and I have not heard if it is enforced even at a single unit.If anyone knows pl. let us know. The Guj.Factory Rule 102 has a schedule for High Noise according to which once in a year each worker exposed to high noise should undergo audiometry test. Many factories carryout it but do not part the report to the workers OR do not explain the content of the report to the worker. The F.Act also provide to notify cases of Noise induced hearing loss to the concerned authority, which again is not being done. We have helped several workers in power plant, textile, chemical, engineering to get diagnosed and claim compensation for the damage under ESI Act
From India, Coimbatore

AGM EHS and Project Management
Dear PTRC,
Happy to see your contribution after a long time.
Dear Murdhar,
PTRC has explained in correctway.
For every 5 dBA increase in noise level the exposure time of thw wrokmen should reduced by half.
If you have focus to comply the legal laws, you should be able to find ways out.
As regards to air compressors, the noisy compressors usually were reciprocating type have now been replaced by screw compressors. The too come with acoustic enclosures.
These are energy efficient as well.
Many companies have replaced old compressors with screw type and enjoyed pay back within less than 12 months with reduction in noise levels.
Thanks & Regards,

From India, Nasik
Ok Mr.Sudhir,
What about heavy DG sets (>2 MW engines). The noise level cannot be reduced and the operators or the working personnel in and around the machines, have to wear personnel protective equipments. There is no other choice

From India, Mumbai

Safety Consultant
Dear All

So far great discussion... Thanks all for participating and giving great inputs...

Dear Mr. Bipin Gautam

Please let me know how you conducting this walkabout survey... What is the equipment you are using for conducting this survey...

Recently I have seen one portable noise monitoring equipment with the marketing executive of M/s. Honeywell... Like we doing personal sampling for knowing the average exposure of dust during the 8 hours work for a person working in dusty environment this equipment works... The employee working has to attach this small handy equipment in his pocket or belt and allow the employee to do his 8 hours work... Which may includes the one hour lunch time... Then note the result... See what is the exposure for 8 hours... Then accordingly planned for preventive actions...

However do let me know how you plan to do this survey... I think in traditional way we are just monitoring the exposure from a distance of 5 & 10 meter momentarily from source of noise and noting down the results... I think measuring the exposure for 8 hours is always better than this traditional way...

Expecting comments from all the members on this aspect...

From India

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