1-Meter Acoustic Enclosure Measurement
Sound pressure level measured at 4 cardinal points 1 meter away from the canopy surface at 1.5 meters height under 75-100% generator load.
Rispri Laboratory · NABL Accredited Physical Testing
Industrial Noise & Illumination Audits
Calibrated Class-1 Sound Level Meter surveys, 24-hour ambient noise mapping (Noise Pollution Rules 2000), DG set canopy acoustic validation, and workplace Lux illumination audits under the Factories Act 1948.
Class 1
Sound Level Meters
Noise Pollution Rules 2000
Ambient Noise Level Surveys (Noise Pollution Rules 2000)
Continuous Day-Time (06:00 to 22:00) and Night-Time (22:00 to 06:00) Equivalent Sound Level (Leq) monitoring for industrial, commercial, residential, and silence zones.
| Area Category / Zone | Day Time Limit (Leq dB(A)) | Night Time Limit (Leq dB(A)) | Standard Applied |
|---|---|---|---|
| Industrial Zone | 75 dB(A) | 70 dB(A) | Noise Rules 2000 / CPCB |
| Commercial Zone | 65 dB(A) | 55 dB(A) | Noise Rules 2000 / CPCB |
| Residential Zone | 55 dB(A) | 45 dB(A) | Noise Rules 2000 / CPCB |
| Silence Zone (Hospitals / Schools) | 50 dB(A) | 40 dB(A) | Noise Rules 2000 / CPCB |
CPCB DG Set Boundary Norms
DG Set Acoustic Noise Boundary Audits
Verification of DG set acoustic enclosure insertion loss to ensure noise output does not exceed 75 dB(A) at 1 meter from the acoustic enclosure surface as mandated by CPCB guidelines.
Insertion Loss Validation
Calculates dB(A) sound attenuation achieved by the acoustic enclosure (minimum 25 dB(A) insertion loss requirement).
Factories Act 1948 Standards
Workplace Illumination (Lux Meter) Audits
Illumination surveys measuring Lux levels across manufacturing shops, quality inspection benches, control rooms, warehouses, and office workstations under IS 6665 & Factories Act 1948.
| Work Area / Task Type | Recommended Lux Level | Minimum Acceptable Lux |
|---|---|---|
| Precision Assembly & Fine Inspection | 750 – 1000 Lux | 500 Lux |
| General Machine Shop & Manufacturing | 300 – 500 Lux | 200 Lux |
| Control Rooms & Control Desks | 300 – 400 Lux | 200 Lux |
| Warehouses & Raw Material Storage | 150 – 200 Lux | 100 Lux |
| Corridors & Passageways | 100 Lux | 50 Lux |
8-Hour Time-Weighted Average
Occupational Noise Exposure Mapping
Personal 8-hour noise dosimetry for high-noise areas (compressor rooms, turbine halls, stamping presses) to ensure worker exposure does not exceed 90 dB(A) TWA (Time Weighted Average) to prevent hearing conservation violations.