Inaudible Low Frequency Noise & Vibration
Low frequency noise is increasingly becoming an problem in the industry and environment which is frequently not recognised and addressed in plant design. The problems are usually associated with vibrations felt in dwellings; and in this case at the world’s largest offshore gas platform Sarawak was felt in the Living Quarters.
We were requested to undertake a study to quantify the severity of the problem and to identify root causes upon which remedial solutions were developed. From the site surveys, it was apparent that noise measurements in dBA as conventionally used in normal measurements and assessment did not pick up the inaudible low frequency noise which instead required analysis in linear frequency weighting.
The root cause was successfully identified. The Study also involved noise modeling validated against measurements, upon which noise reduction options were examined and optimised using noise models before a final noise control design was selected.
“You got to help us solve this problem”
Project Manager E11P‐B, Sarawak Shell Bhd