Monitoring

Noise Level Monitoring & Assessment

Day and night noise levels measured to rule, with practical mitigation.

Overview

The Noise Pollution (Regulation and Control) Rules, 2000 set day and night limits by area category, and consent conditions frequently require periodic verification at the boundary. Workplace noise carries separate occupational exposure limits.

We measure with calibrated sound level meters, report Leq day and night values by location, and where limits are exceeded, identify the dominant sources and the mitigation that will actually reduce them.

How we deliver it

  1. 1

    Location survey

    Boundary, receptor and source points are fixed with reference to area category.

  2. 2

    Measurement

    Day and night measurements are taken over prescribed periods with calibration checks.

  3. 3

    Assessment

    Results are compared to the applicable category limits and dominant sources identified.

  4. 4

    Mitigation

    Enclosures, barriers, silencers or scheduling changes are recommended and costed.

Industries we serve

  • Manufacturing plants with heavy machinery
  • DG set installations
  • Construction sites
  • Hotels and event venues
  • Hospitals in silence zones

Frequently asked questions

What are the permissible noise limits?

Limits vary by area category — industrial, commercial, residential and silence zone — and differ between daytime and night-time. Your applicable limit depends on the classification of the area your site sits in.

Is DG set noise monitored separately?

Yes. Diesel generator sets have specific acoustic enclosure and insertion-loss requirements in addition to the ambient boundary limits.

How is workplace noise different?

Workplace assessment focuses on personal exposure over a shift rather than boundary levels, and drives hearing protection and engineering control decisions.