AWA AWA5636 Type 2 Digital Sound Level Meter

Overview

The AWA AWA5636 Type 2 Digital Sound Level Meter is a precision-engineered, modular instrument designed for reliable acoustic measurement in industrial, occupational, and environmental contexts. It operates on the principle of electret condenser microphone transduction coupled with digital true-RMS detection, delivering stable and repeatable sound pressure level (SPL) readings across its full dynamic range. Conforming strictly to IEC 61672–1:2013 and GB/T 3785.1–2010 requirements for Class 2 instruments, the AWA5636 ensures metrological traceability and regulatory acceptability in routine noise assessment workflows. Its design emphasizes operational robustness—eliminating mechanical range switching through automatic gain control—and supports consistent performance under variable ambient conditions. The device is not intended for laboratory-grade calibration reference but meets the accuracy and stability thresholds required for field-based compliance screening, workplace noise mapping, and pre-compliance environmental surveys.

Key Features

• Digital true-RMS detector architecture enabling continuous, drift-free measurement without manual range selection
• Integrated electret condenser microphone with flat frequency response from 20 Hz to 12.5 kHz (±2.5 dB), optimized for A-weighted measurements per IEC 61672
• Low intrinsic self-noise (<33 dB(A)) ensuring high signal-to-noise ratio even at low-level emission sources
• Extended battery runtime of up to 10 hours on standard alkaline cells, supporting full-shift monitoring without interruption
• RF immunity classified as Class X per IEC 61672–1:2013, minimizing measurement perturbation in electrically noisy industrial environments
• Modular firmware architecture permitting post-purchase activation of optional software modules (e.g., statistical analysis, LEQ logging, octave band extension)
• Validated type approval per national metrological regulation (Certificate No. 2011F358-33), confirming conformity to Class 2 performance limits

Sample Compatibility & Compliance

The AWA5636 is suitable for measuring airborne sound pressure levels generated by stationary and mobile sources including rotating machinery, HVAC systems, transportation fleets, and consumer appliances. It supports A-weighted (dB(A)) measurements exclusively, aligned with human hearing sensitivity and widely adopted in occupational health (e.g., OSHA 1910.95, EU Directive 2003/10/EC) and environmental noise legislation (e.g., ISO 1996 series). While not certified for use in GLP or FDA-regulated validation protocols, its documented conformance to IEC 61672–1:2013 Class 2 permits inclusion in ISO 14001-aligned environmental management systems and internal QA/QC noise audits. Calibration verification is performed using traceable acoustic calibrators (e.g., Class 1 pistonphones per IEC 60942), and users are advised to conduct field checks before and after each measurement session.

Software & Data Management

Data acquisition and reporting are supported via optional PC-based configuration and analysis software, compatible with Windows OS. The software enables real-time waveform viewing, time-history export (CSV), and generation of summary statistics (L_max, L_min, L_eq, L₁₀, L₅₀, L₉₀). All stored datasets include embedded metadata: timestamp, measurement mode, microphone serial number, and calibration status. While the base firmware does not implement audit-trail functionality or electronic signature controls, the optional software package supports user-defined report templates compliant with internal documentation standards. Exported files retain unaltered raw data streams, facilitating third-party reanalysis or integration into enterprise environmental monitoring platforms.

Applications

• Ongoing noise exposure assessment for compliance with occupational exposure limits (e.g., 85 dB(A) TWA over 8-hour shift)
• Pre-installation and post-commissioning noise surveys of industrial equipment prior to handover
• Environmental baseline studies for construction site monitoring and municipal zoning evaluations
• Product development testing of domestic appliances, power tools, and automotive components
• Educational demonstrations of acoustics fundamentals and noise control principles in engineering laboratories
• Field verification of noise barrier effectiveness and façade transmission loss estimates

FAQ

Is the AWA5636 suitable for legal noise enforcement or court-admissible measurements?
No—it meets IEC 61672 Class 2 specifications, which are appropriate for screening and preliminary assessment but not for evidentiary use requiring Class 1 instrumentation.
Does the device support real-time 1/1 or 1/3-octave band analysis?
Not natively; octave-band functionality requires optional firmware licensing and external software processing.
What calibration standard is recommended for field verification?
A Class 1 acoustic calibrator (e.g., 114 dB @ 1 kHz, ±0.2 dB tolerance per IEC 60942) is required before and after each measurement campaign.
Can measurement data be exported in formats compatible with LMS or MATLAB?
Yes—time-series data exports as CSV with millisecond timestamps and linearized voltage-equivalent values, enabling direct import into MATLAB, Python (pandas), or commercial vibration/acoustics analysis suites.
Is firmware upgrade capability available via USB or Bluetooth?
Firmware updates are performed exclusively via micro-USB connection using AWA’s proprietary configuration utility; Bluetooth is not supported.