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Sound Level Meter

Noise at Work Measurements with Nor150

Occupational noise assessment solution with advanced analysis.

Overview

The Nor150 occupational noise assessment solution provides a comprehensive, ISO 9612-compliant system for evaluating worker noise exposure and supporting hearing conservation programs in industrial environments. The system calculates all required exposure metrics including daily noise exposure level (LEX,8h), C-weighted peak sound pressure level (LC,peak), and noise dose, enabling occupational hea…

Key Features

  • ISO 9612 compliant occupational noise exposure assessment
  • Daily noise exposure level (LEX,8h) and peak level (LC,peak) calculation
  • Task-based, job-based, and full-day measurement strategies supported
  • Statistical noise sampling with uncertainty calculation per ISO 9612
  • Noise dose calculation for OSHA and GCC regulatory comparison
  • Marker function for tagging task-specific measurements during surveys
  • Real-time 1/3 octave band analysis for hearing protector selection
  • Hand-arm vibration assessment per ISO 5349 with vibration channel

Applications

  • Worker daily noise exposure assessment per ISO 9612
  • Hearing conservation program noise surveys for industrial facilities
  • Oil refinery and petrochemical plant occupational noise assessment
  • Manufacturing facility workplace noise mapping and control planning
  • Construction site noise exposure monitoring for worker safety
  • Mining and quarry operation noise assessment

Technical Specifications

  • Analyzer: Nor150
  • Standards: ISO 9612, OSHA, EU Directive
  • Metrics: LEX,8h, LC,peak, dose
  • Analysis: Statistical sampling per ISO 9612

Frequently Asked Questions

  • Which exposure metrics are calculated?
    The system calculates daily noise exposure level LEX,8h (A-weighted equivalent continuous level normalized to 8 hours), C-weighted peak sound pressure level LC,peak, and percentage noise dose. These metrics cover the requirements of ISO 9612, OSHA regulations, and GCC workplace safety codes.
  • Does it support ISO 9612 task-based analysis?
    Yes, the system and Nor850 software handle all three ISO 9612 measurement strategies: task-based (most common in GCC industrial applications), job-based, and full-day. The task-based approach allows operators to measure individual tasks and combine them with time-weighted calculations to determine overall daily exposure.
  • Can the Nor150 also assess hand-arm vibration exposure?
    Yes, the Nor150 includes ISO 8041 vibration measurement capability. With an appropriate accelerometer, it can assess hand-arm vibration exposure per ISO 5349 and whole-body vibration per ISO 2631, providing a complete noise and vibration occupational health assessment in a single instrument.

Application Guide

The Noise at Work Measurements with Nor150 belongs to the Norsonic Sound Level Meter range. See the Sound Level Meter application guide for system configuration, compatible accessories, and applicable measurement standards.

Related Norsonic Products

Why Norsonic?

  • Manufactured in Norway — decades of acoustic measurement heritage; all instruments designed and built in Norsonic AS, Lierskogen, Norway
  • IEC 61672 Class 1 — highest accuracy class for professional and regulatory acoustic measurement
  • International type approvals — PTB (Germany) and LNE (France); accepted by environmental authorities across the region
  • 3-year manufacturer warranty — covers parts and labour; Norsonic Asia authorized service center support throughout the region
  • Open data formats — .nox files work with NorReview and can be exported to CSV, Excel, and third-party analysis software

Calibration and Compliance

  • All Norsonic instruments require periodic IEC 61672-3 calibration — Norsonic Asia provides factory-authorized calibration services with full DANAK-traceable certificates
  • Calibration interval: 1 year for ISO 17025 accredited laboratories; 2 years for field instruments in non-accredited applications
  • Field calibration check: use an IEC 60942 Class 1 sound calibrator (94 dB or 114 dB) before and after each measurement session
  • Loaner instruments available during calibration to minimize project downtime — contact Norsonic Asia for loaner availability

Availability & Regional Support

Available from Norsonic Asia — the factory-authorized distributor for ASEAN, GCC, and South Asia. Instrument supply includes 3-year manufacturer warranty, factory-authorized calibration services, operator training, and after-sales technical support.

  • Typical lead time: 3–6 weeks from order confirmation (ex-factory Norway)
  • Countries served: Singapore, Malaysia, Thailand, Vietnam, Philippines, Indonesia, UAE, Saudi Arabia, Qatar, Kuwait, India, Bangladesh, Sri Lanka, and more
  • Technical support: English and Arabic; response within 1 business day

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