Environmental Noise Monitoring Systems: Selection Guide for Asia
Environmental noise monitoring in Asia covers temporary construction site monitoring with the Nor145 sound level meter and permanent unattended monitoring with the Nor1545 terminal and NorCloud cloud data management. Both systems are IEC 61672 Class 1 — meeting regional regulatory requirements across ASEAN, GCC, and South Asia for legally defensible noise data.
Option 1 — Temporary Monitoring: Nor145 Sound Level Meter
- Nor145 Sound Level Meter — Class 1 IEC 61672, 4.3" touchscreen, 4G LTE, GPS, NorCloud integration
- Typical deployment duration: 1 day to 3 months; ideal for project-duration compliance monitoring
- Real-time LAeq, Lmax, L10, L90, L95 logging at configurable intervals (1-second to 1-hour)
- Real-time exceedance alerts via NorCloud when LAeq or Lmax exceeds threshold — email and SMS notification
- GPS geo-tagging for mobile survey routes and multi-point noise mapping
- Battery-powered for remote sites without mains power; over 10 hours typical battery life
- Audio event recording triggered by threshold exceedances — evidence file for authority and contractor
Option 2 — Permanent Unattended Monitoring: Nor1545 Terminal
- Nor1545 Noise Monitoring Terminal — Unattended Class 1 monitoring station for long-term deployments
- 4G LTE / GSM connectivity for continuous remote data transmission to NorCloud
- Weatherproof IP-rated housing — outdoor installation without shelter enclosure
- Solar panel power option for off-grid locations
- Applications: airport perimeter, highway monitoring, industrial fence-line, urban noise networks
- Multi-station capability — manage a network of monitoring points from one NorCloud account
NorCloud Data Management Platform
- Web-based dashboard — accessible from any device without software installation
- Real-time time histories: LAeq, Lmax, Lmin, L10, L50, L90, L95 per measurement interval
- Automated PDF and Excel reports on daily, weekly, or monthly schedules — ready for authority submission
- Email and SMS exceedance alerts on threshold breach via NorCloud
- Audio event recording — MP3 file attached to each Lmax exceedance event
- Multi-user access — separate authority read-only login for transparent regulatory oversight
- Long-term data archive — multi-year storage for trend analysis and legal proceedings
NoiseCompass (Nor1297) — Direction of Arrival
NoiseCompass, based on the Nor1297 microphone array, determines the direction of arrival of noise at a monitoring terminal. It separates the source of interest from background noise and provides defensible directional evidence in complaint and compliance disputes, integrated with NorCloud.
- Identifies the bearing from which noise arrives at the terminal
- Separates the source of interest from ambient background noise
- Defensible directional evidence for complaints, ports, airports and industrial fence-lines
Watch: directional noise monitoring with NorCloud & Nor1297 (NoiseCompass)
NoiseTag — AI Noise Source Classification
NoiseTag uses artificial intelligence to automatically classify environmental noise sources — traffic, aircraft, construction, industry and more — directly in NorCloud. This reduces manual analysis and makes long-duration compliance reporting actionable for consultants, utilities and regulators.
- Automatic AI classification of noise sources within NorCloud
- Cuts manual listening and event-tagging for long monitoring campaigns
- Complements NoiseCompass: NoiseTag answers "what is it?", NoiseCompass answers "where from?"
Watch: classifying environmental noise sources with AI | NoiseTag on NorCloud
How to Choose: Nor145 vs Nor1545
- Use Nor145 when: project duration is less than 6 months, portable, battery operation preferred, or budget is limited
- Use Nor1545 when: permanent installation, multi-year monitoring, network of stations, or mains power is available
- Use both: Nor1545 for permanent boundary monitoring + Nor145 for complaint-response spot checks
Applicable Standards by Region
- ISO 1996-1/2: Noise description
- IEC 61672-1: Class 1 accuracy
- Singapore BCA/NEA code
- Malaysia DoE guidelines
- Thailand PCD standards
- Vietnam QCVN 26
- UAE Federal Law No. 24
- Saudi Arabia GAMEP
Related Resources
- Noise Monitoring Playbook — full 4-phase deployment guide
- Case Studies — metro construction, airport and industrial monitoring
- Environmental Noise Industry Guide
- Nor1545 Technical Specifications
- Nor145 Technical Specifications