How can structure-borne noise from heavy machinery be prevented?

By isolating the machinery using resilient mountings, vibration pads, and ensuring separate independent foundations to prevent vibration transfer to the main building structure.

What is the recommended noise limit for a typical machine shop?

Usually maintained at or below 90 dB(A) to minimize the risk of permanent hearing damage during an 8-hour shift.

How should an industrial site be laid out to minimize noise issues?

Noisy operations should be grouped together, separated from quiet zones (like offices or design rooms) by buffer areas such as storage rooms or heavy acoustic walls.

IS 3483

: 1965

Code of practice for noise reduction in industrial buildings

CurrentSpecializedCode of PracticeArchitectural · Functional Requirements in Buildings

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This code provides comprehensive guidelines for reducing noise in industrial buildings. It covers acceptable noise levels for various functional areas, proper layout and siting of facilities, and techniques for sound insulation and absorption to protect worker health and improve acoustic efficiency.

Code of practice for noise reduction in industrial buildings

Quick Reference Values

Acceptable noise level in general machine shops90 dB(A)

Acceptable noise level in industrial offices50 dB(A)

Acceptable noise level in factory canteens55 dB(A)

Recommended max continuous exposure without protection85 to 90 dB(A)

Practical Notes

Always prioritize reducing noise at the source (e.g., proper machine maintenance, anti-vibration mountings) before resorting to expensive building treatments.

Treating the ceiling with sound-absorbing materials is generally the most effective way to reduce reverberant noise in large, open factory halls.

Do not confuse insulation with absorption: dense, massive materials (like concrete/brick) are needed to block sound transmission between rooms, whereas soft, porous materials are used to absorb sound within a room.