Environmental Noise Monitoring PLACID

Overview

Environmental noise monitoring requires instruments that perform reliably over extended deployment periods in harsh outdoor conditions. Temperature extremes, humidity, wind, and precipitation all challenge measurement accuracy. The defensibility of your data depends on demonstrated calibration stability throughout the monitoring period.

Field-ready noise monitoring system for regulatory compliance, construction site monitoring, and environmental impact assessment. Class 1 accuracy with weatherproof housing and remote data access.

Measurement Challenges

• Maintaining calibration accuracy across temperature and humidity extremes
• Wind noise interference and weather protection requirements
• Long-term deployment reliability and data integrity
• Regulatory compliance with stated measurement uncertainty
• Remote monitoring and unattended operation capabilities

PLACID Solutions

• PLACID PMK55-1 outdoor microphone housing with IP55 protection rating
• Class 1 measurement microphones with documented long-term stability
• Windscreen systems designed for omnidirectional wind conditions
• Multi-channel DAQ with remote monitoring capability
• ISO/IEC 17025 accredited calibration with stated uncertainty

Applicable Standards

ISO 1996-1 Description, measurement and assessment of environmental noise — Part 1: Basic quantities and assessment procedures

ISO 1996-2 Description, measurement and assessment of environmental noise — Part 2: Determination of sound pressure levels

IEC 61672-1Electroacoustics — Sound level meters — Part 1: Specifications

ISO 20906 Acoustics — Unattended monitoring of aircraft sound in the vicinity of airports

Typical Specifications Required

• Class 1 frequency weighting accuracy per IEC 61672-1
• Dynamic range covering at least 25 dB(A) to 140 dB(A)
• LAeq, LA10, LA90, LAmax, LAmin statistical descriptors
• 1/3-octave band spectral analysis from 12.5 Hz to 20 kHz
• Temperature operating range of -20 °C to +55 °C
• Outdoor protection rated IP55 or better
• Windscreen insertion loss below 0.5 dB at 1 kHz