AWA ASV5910 Dual-Channel Sound Exposure and Precision Sound Level Meter

Overview

The AWA ASV5910 Dual-Channel Sound Exposure and Precision Sound Level Meter is an integrated, field-deployable acoustic measurement instrument engineered for occupational noise assessment, regulatory compliance monitoring, and industrial hygiene applications. It operates on the principle of digital signal processing (DSP)–based real-time acoustic pressure transduction, utilizing pre-polarized ¼″ free-field condenser microphones with calibrated sensitivity (−50 dB re 1 V/Pa). The device conforms to IEC 61672:2002 Class 2 for sound level meters and IEC 61252:2002 for personal sound exposure meters—ensuring metrological traceability and alignment with global occupational health frameworks including OSHA 1910.95, EU Directive 2003/10/EC, and ISO 9612:2009. Its dual-channel architecture enables synchronized acquisition of two independent acoustic streams—critical for comparative measurements (e.g., source vs. receiver, near-field vs. far-field), binaural exposure evaluation, or simultaneous A-weighted and C-weighted monitoring under identical environmental conditions.

Key Features

• Dual-channel parallel measurement with fully independent configuration per channel: selectable frequency weighting (A/C/Z), time weighting (Fast/Slow/Impulse/Peak), and integration parameters.
• True RMS digital detection ensures high reproducibility across dynamic ranges and non-stationary noise events—including impulsive, intermittent, and tonal signals.
• Integrated personal sound exposure functionality compliant with IEC 61252:2002, supporting Lex,8h, TWA, DOSE, and SD calculations with configurable exchange rates (3, 4, 5, or 6 dB) and user-defined threshold levels (40–90 dB).
• Explosion-proof variant certified to Ex ib IIB T3 Gb per IEC 60079-0 and IEC 60079-11—suitable for Zone 1 hazardous areas in petrochemical, mining, and pharmaceutical manufacturing environments.
• Onboard 2 GB Flash RAM enables storage of up to 8,000 complete measurement sets, including metadata (date/time, configuration, operator ID), statistical distributions (LN values), and time-history records.
• Simultaneous real-time logging and audio recording: supports triggered (threshold-based) or synchronized recording with integration start; formats include WAV (16-bit PCM) with adjustable sampling resolution and duration (10 s–64 h).
• Mini-USB interface operates in mass-storage mode—no driver installation required—enabling direct file transfer to Windows/macOS/Linux systems for post-processing in Excel, MATLAB, or dedicated noise analysis software.

Sample Compatibility & Compliance

The ASV5910 is designed for direct coupling to human-worn configurations (e.g., shoulder-mounted or lapel-mounted via optional clips) and fixed-point industrial mounting. Its compact form factor (65 × 55 × 18 mm, 85 g) minimizes inertial loading and spatial interference during personal exposure assessments. Microphone calibration is traceable to national standards (e.g., NIM China, PTB Germany), and periodic verification follows ISO/IEC 17025 requirements. The instrument meets GLP-relevant data integrity criteria: all stored records contain immutable timestamps, configuration snapshots, and audit-ready metadata. For regulated environments—particularly those subject to FDA 21 CFR Part 11 or EU Annex 11—the device supports secure export workflows compatible with validated electronic laboratory notebooks (ELNs) and LIMS integration via standardized CSV/TSV output.

Software & Data Management

Measurement data are stored in plain-text format (.txt), fully compatible with Microsoft Excel, LibreOffice Calc, and statistical analysis platforms without proprietary conversion tools. Each record includes header information specifying instrument ID, firmware version, calibration date, and measurement context. The embedded real-time clock maintains synchronization accuracy better than ±1 second per month. For advanced spectral analysis, optional 1/3-octave band modules (Class 2 compliant per IEC 61260-1:2014) extend functionality to noise source identification, hearing conservation program validation, and acoustic material characterization. Firmware updates are delivered via USB and include cryptographic signature verification to ensure integrity and prevent unauthorized modification.

Applications

• Occupational noise exposure assessment in manufacturing, construction, transportation, and utilities—supporting daily dose calculation and hearing conservation program documentation.
• Hazardous area noise monitoring in oil refineries, chemical plants, and offshore platforms where intrinsic safety certification is mandatory.
• Acoustic validation of engineering controls (e.g., enclosures, mufflers, damping treatments) through before-and-after dual-channel comparative measurements.
• Research-grade field studies requiring long-duration, unattended logging with timestamped audio correlation—for example, urban noise mapping or community annoyance surveys.
• Educational laboratories for teaching acoustics fundamentals, including time-domain analysis, frequency weighting effects, and statistical sound level interpretation.

FAQ

What standards does the ASV5910 comply with?
It complies with IEC 61672:2002 Class 2 (sound level meter), IEC 61252:2002 (personal sound exposure meter), GB/T 3785-2010 Class 2, and GB/T 15952-2010.
Can the instrument perform simultaneous logging and audio recording?
Yes—both functions operate in parallel with independent interval settings: time-weighted level logging (0.01–6.00 s intervals) and short-term Leq logging (0.1–60 s intervals), alongside WAV audio capture triggered by threshold exceedance or synchronized with measurement start.
Is the explosion-proof version suitable for Zone 0 environments?
No—Ex ib IIB T3 Gb certification applies to Zone 1 only. Zone 0 requires higher protection levels (e.g., Ex ia) not supported by this model.
How is data integrity ensured during export and archival?
All exported files retain original timestamps, configuration parameters, and measurement metadata. No post-acquisition editing capability exists on-device; modifications require external software with full audit trail logging.
Does the ASV5910 support remote configuration or network connectivity?
No—configuration is performed locally via keypad and OLED display. Networked operation is outside its design scope; it prioritizes offline robustness, battery autonomy, and regulatory portability.