EIWAA Marine Services provides NDT Inspection and Testing of Noise Survey, Noise Monitoring and Noise analysis services in Saudi Arabia. Our Noise measurement services in offshore Rigs, Vessels and Ships shall be approved by major IACS Classification societies and offshore contractors in Saudi Arabia. Working in situations with excessive noise levels may result in permanent hearing loss.

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 plugs should be worn unless the exposure time is limited to no longer than 10 minutes. 

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

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 real time octave band analyzer that integrates a field noise level calibrator and 1/3 octave band sound level meter is available that meets Type 2 ANSI and IEC requirements