TSI SoundPro™ SE-DL Octave-Band Integrating Sound Level Meter

Overview

The TSI SoundPro™ SE-DL Octave-Band Integrating Sound Level Meter is a precision-engineered instrument designed for compliance-grade occupational and environmental noise assessment. Built to meet the metrological requirements of IEC 61672-1:2013 (Class 1 or Class 2) and ANSI S1.4-2014, it delivers traceable, repeatable sound pressure level (SPL) measurements across a wide dynamic range (10–140 dB). Its core architecture integrates real-time 1/1-octave band analysis (31.5 Hz to 8 kHz) with simultaneous time-domain integration—enabling both broadband metrics (e.g., LA_eq, LC_peak) and frequency-resolved data acquisition in a single measurement session. The device operates on the fundamental principle of electret condenser microphone transduction, coupled with high-stability analog-to-digital conversion and digital signal processing optimized for octave-band filter bank implementation per IEC 61260-1:2014. This dual-path capability supports rigorous regulatory evaluation—including OSHA 1910.95, EU Directive 2003/10/EC, and ISO 9612 for task-based exposure assessment—as well as technical applications such as HVAC system validation (NEBB-compliant), architectural acoustics (STI-PA method), and vehicle NVH characterization.

Key Features

• Simultaneous operation of two independent virtual sound level meters—enabling concurrent A-weighted and C-weighted analysis without sequential measurement cycles
• Selectable frequency weightings: A (for hearing damage risk), C (for peak energy assessment), and Z (linear, unweighted) per IEC 61672
• Time-weighting options: Fast (125 ms), Slow (1 s), and Impulse (35 ms rise, 1.5 s decay) compliant with IEC 61672-1
• Configurable exchange rates (3, 4, 5, or 6 dB) for noise dose calculation aligned with regional regulatory frameworks (e.g., 3 dB for EU, 5 dB for OSHA)
• Backlit graphical LCD with multilingual interface (English, Spanish, French, German, Chinese) and illuminated keypad for low-light field use
• Real-time 1/1-octave band spectrum display with user-definable center frequencies and adjustable averaging periods
• Internal clock-synchronized data logging at programmable intervals (1 sec to 60 min), stored on removable SD card with FAT32 formatting support
• Dual communication interfaces: USB 2.0 (CDC class, no driver required on modern OS) and RS-232 serial port for legacy system integration

Sample Compatibility & Compliance

The SoundPro™ SE-DL is validated for use with standard ½-inch electret condenser microphones (e.g., TSI 055000 series), calibrated traceably to NIST standards. It satisfies mandatory performance criteria for workplace noise monitoring under OSHA 1910.95, MSHA Part 62, and EU Physical Agents (Noise) Directive 2003/10/EC. For environmental applications, it meets the technical specifications outlined in ISO 1996-1 and ASTM E1034 for outdoor noise surveys. When used with optional calibration adapters and windshields, it complies with ANSI S1.11-2020 for free-field response correction. All firmware versions undergo periodic verification against IEC 61672 Annex B test procedures. Device configuration, measurement history, and calibration logs are retained with timestamping and operator ID tagging—supporting GLP-aligned documentation workflows.

Software & Data Management

Raw and processed data (including time-history waveforms, octave band spectra, and dose summaries) are exportable via SD card or USB in CSV and XML formats. The instrument is fully compatible with TSI Quest Detection Management Software (DMS), a Windows-based application supporting advanced spectral post-processing, multi-instrument synchronization, automated report generation (PDF/HTML), and audit-trail-enabled data archiving. DMS implements role-based access control and electronic signature functionality compliant with FDA 21 CFR Part 11 requirements when configured for regulated environments. All measurement sessions include embedded metadata: GPS coordinates (if enabled via external module), temperature/humidity (via optional sensor input), battery status, and microphone sensitivity value—ensuring full traceability per ISO/IEC 17025 clause 7.5.2.

Applications

• Occupational health & safety: Daily noise exposure assessment, hearing conservation program validation, and engineering control verification
• Environmental noise mapping: Community noise surveys near transportation corridors, industrial zones, and construction sites
• Building acoustics: Speech transmission index (STI-PA) testing, room reverberation analysis, and façade insulation evaluation
• Automotive & aerospace: Powertrain noise profiling, cabin NVH optimization, and component-level airborne emission testing
• HVAC commissioning: NEBB-certified airflow and duct-borne noise diagnostics per NEBB Procedural Standards for Testing, Adjusting, and Balancing
• Product development labs: Consumer electronics audio leakage testing, appliance sound quality benchmarking, and regulatory pre-compliance screening

FAQ

What standards does the SoundPro™ SE-DL comply with for occupational noise measurement?
It conforms to IEC 61672-1:2013 (Class 1 or Class 2), ANSI S1.4-2014, and supports calculation methods defined in ISO 9612 and OSHA Technical Manual Chapter 8.
Can the device perform real-time octave band analysis while logging broadband metrics?
Yes—dual DSP cores enable simultaneous 1/1-octave band FFT processing and time-integrated Leq/Lmax/Lmin computation without performance degradation.
Is firmware upgrade supported in the field?
Yes—updates are delivered via USB or SD card using TSI-provided signed firmware packages; version history and checksum verification are logged internally.
Does the instrument support external GPS or environmental sensors?
GPS positioning and ambient temperature/humidity inputs are supported through optional accessory modules connected via the auxiliary analog/digital I/O port.
How is calibration traceability maintained during long-term deployment?
Each unit ships with a NIST-traceable calibration certificate; field verification is performed using an accredited acoustic calibrator (e.g., TSI 055010), with results stored in the internal calibration log alongside date, technician ID, and deviation values.