noise amplitude

noise amplitude

Environmental sound study has to be performed for environmental place and industrial plant with consideration of noise criteria (noise amplitude). INERTANCE has studies the related sound criteria such as work area noise, restricted noise area, absolute noise limit, indoor noise assessment (NC curve sound limit) for speech and work interference, etc. The definition of noise criteria is generally required for following reasons;

To reduce speech and work interference
To ensure the warning signals are audible
To conserve the hearing of workers
To allow adequate speech, telephone, and radio communication
To maintain working efficiency
To measure the noise amplitude
To provide the quite accommodation
To prevent annoyance to the neighboring community

Sound limit – Work Area Noise

Sound pressure level including existing background noise in the work area within plant work area shall not exceed normally 85 ~ 90 dB(A) at any point 1 meter away from any equipment surface. This specific noise limit has to be followed from project requirements.

Noise criteria – Restricted Noise Area

Restricted areas are those work areas in the plant where it is not reasonably practicable to reduce the noise level below the work area limit. Such a restricted area limit may be between 85 dB(A) and 115 dB(A). Permanent warning signs to indicate the mandatory use of ear protectors shall be installed at boundaries of restricted area.

Sound Criteria – Absolute Noise Limit

The sound pressure level (noise amplitude) shall not normally exceed 115 dB(A) at any time and at any location which is accessible to workers in any situation, including emergency such as the blowing of safety relief valves. This specific noise limit has to be followed from project requirements.

Industrial Noise

Industrial Noise

Industrial noise level assessment has considered the plant noise such as gas, petroleum, chemical, power plant, in which many kinds of noise sources have been applied. INERTANCE has predicted the noise levels by rotating equipment, piping system, valves based on our experience in the specialized field, and the same has been considered to the equipment arrangement via noise allocation study during initial design stage. Plant sound study includes the sound coverage study and indoor sound (indoor noise) assessment.

INERTANCE has a capability to perform below kinds of noise study.

Case Study for Emergency Condition
Worker Hearing Loss
Hearing Conservation Program
Work Area Noise Level
Definition for Noise Restricted Area
Absolute Noise Limit
Local Regulation of Noise
Industrial Noise for Plant
Ambient Noise Survey
Industrial Sound Study
Noise Verification Survey during Commissioning Stage

Here, INERTANCE can show the various kinds of noise simulation regarding industrial noise as follows;

Plant Noise, Plant Sound

Noise study includes getting the noise contour map& survey data in plant facilities, and defines the noise restricted area with control design, if necessary.

Indoor Noise, Indoor Sound

There are many kinds of spaces in building with own uses such as control room, office and base camp in plant facilities. Ambient noise source should be checked in initial design stage to minimize the speech interference.

Sound Coverage Study

The arrangement of loudspeakers is the important to share the central notification in plant work area, specially in such emergencies like fire, toxic fluid leakage, etc. INERTANCE can provide the industrial sound coverage study to predict the sound pressure level helping to design the clear alarm tones and message.

INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment of industrial noise. For further information, contact us at (admin@inertance.com).

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