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Noise Survey:

To lessen human weariness, the danger of misunderstanding, and human errors, special attention must be paid to noise surveys done on ships and offshore installations in accordance with IMO regulations and IACS classifications. Working in situations with excessive noise levels may result in permanent hearing
loss. Ships and offshore platforms do emit noise that has an effect on the environment.

Noise Zones may be classified as follows according to the IMO Regulations for Noise Monitoring:

[Zone A] Maximum exposure with protection
Exposure [Zone D] daily
Exposure on occasion [Zone B]
Exposure on occasion [Zone C]


Maximum Noise Exposure with Maximum Protection [Zone A]: No Marine crews, even those wearing earplugs, should be exposed to sounds above 120 dB (A) or to levels above 105 dB (A) at a level of 24.

Daily exposure [Zone D]: Marine sailors working in a D zone sound environments on a daily basis should wear ear protection, and a hearing conservation program may be taken into consideration.

Exposure on occasion [Zone B] – Exposure on occasion should be permitted in Zone B, and both ear muffs and ear plugs should be worn unless the exposure time is limited to no longer than 10 minutes, in which case only ear muffs or plugs are needed.

Occasional exposure [Zone C] – Only occasional exposure should be permitted in Zone C, and earplugs or muffs should be necessary.

Our Approach

Noise specifications creation.
Noise Assessment in Several Locations
Measurements of noise
Measurements of machine vibration, noise monitoring, analysis, diagnosis, and trouble shooting.
Noise Rating Structure and pipe vibrations at various operating frequencies are subject to inspection and noise monitoring
Recommendation to adhere to measurements of the permissible noise level.
Guidelines for noise
Noise levels on board ships are governed by IMO Resolution A.468(XII).

Standards for noise

IMO Resolution A.468(XII) – Code on Noise Levels on Board Ships

Noise Rating(NR) as per ISO:


Instruments We Use
A realtime octave band analyzer that integrates a field noise level calibrator and an octave and 1/3 octave band sound level meter is available meets Type 2 ANSI and IEC requirements.All significant IACS Classification Societies have approved it.

Why is EIWAA Gulf Rocks……?

Stay away from expensive redesign.
Reduce noise at sites offshore and aboard existing ships.
Follow all rules, and regulations.
Make sure the workplace is comfortable.
Avoid vibration-related technical issues.