XL2 Sound Level Meter



The XL2 Analyzer forms the unique combination of a state-of-the-art Sound Level Meter, a comprehensive Acoustic Analyzer as well as a powerful Audio Analyzer. A range of measurement microphones with an electronic data sheet are available to suit your requirements.

Besides being an advanced, integrating Sound Level Meter, the XL2 measures RTA and FFT high-resolution spectra, RT60 Reverberation Time, Polarity, Delay and THD+N. Optional features are speech intelligibility STIPA, extended acoustics functions, noise curves, cinema calibration, pass/fail analysis and remote measurement acquisition. The Type Approval Option upgrades the instrument to the XL2-TA, a type approved sound level meter.

Data and audio is logged onto the SD card for transfer to the computer. The XL2 stores all reports and log files in plain text format, which can be opened with any text editing application (Notepad, Wordpad, etc). Furthermore a series of free MS Excel application templates provide a convenient way to view the measurement results of specific tasks and create simple reports. The optional XL2 Data Explorer software offers comprehensive analysis tools for logged noise monitoring data.

The wide range of functions is tailored for measurement tasks in:

  • Installed Sound
  • Life Safety Systems
  • Noise Monitoring
  • Live Sound
  • Broadcast
  • Building Acoustics
  • Industrial and Aerospace
  • PASS/FAIL Quality Control

Technical Specifications

Sound Level Meter

    • Standards
      • IEC 61672, IEC 60651, IEC 60804
      • China: GB/T 3785:2010, GB/T 3241, GB 3096-2008, GB 50526, GB-T_4959-1995
      • Germany: DIN 15905-5, DIN 45645-2, optional: DIN 45645-1
      • Japan: JIS C1509-1:2005, JIS C 1513 class 1, JIS C 1514 class 0
      • Switzerland: SLV
      • UK: BS6698, BS5969
      • US: ANSI S1.4, ANSI S1.43, ANSI S1.11-2004 class 1
    • Sound levels
      • SPL actual, Lmin, Lmax, Lpeak, Leq, gliding Leq
      • Frequency weighting: A, C, Z (=flat) simultaneously
      • Time weighting: Fast, slow and optional impulse simultaneously
      • Correction values k1, k2
      • Limit monitoring showing exceeding sound levels
      • Digital I/O interface for the control of external peripherals
      • Sound Exposure Level LAE (optional)
      • Percentile statistics for Lxy (x= A, C or Z, y= F, S or EQ1″): 1 – 99%  (optional)
      • Calculated levels: LCeq – LAeq, LAIeq – LAeq, LAFT5eq -LAeq (optional)
      • Clock-impulse maximum level “TaktMax” according DIN 45645-1 (optional)
    • Spectrum Analyzer
      • 1/3 octave, 1/1 octave
      • Frequency weighting: A, C, Z (=flat)
      • Time weighting: Fast, slow and optional impulse
      • Percentile statistics for Lxy (x= A, C or Z, y= F or S ): 1 – 99%  (optional)
    • Logging to SD Card
      • All levels simultaneously
      • Short-time levels including spectrum for 1 second or longer
      • Wav-file for listening (compressed)
      • Data logging in 100 ms intervals (optional)
      • Linear wav-files with 24 bit, 48 kHz resolution (optional)
    • Remote measurement acquisition (optional)

Acoustic Analyzer

  • FFT Analysis
  • RT60 Reverberation Time
  • Polarity
  • Delay
  • 1/12 Octave Analysis (optional)
  • Pass/Fail Measurements (optional)
  • Noise curves (NC, RNC, RC, PNC, NR) (optional)

STIPA Analyzer (optional)

  • Speech Intelligibility Measurement
    IEC60268-16 (edition 4.0, 3.0 and 2.0), ISO 7240-16, ISO 7240-19, DIN VDE 0828-1, DIN VDE 0833-4
  • Ambient Noise Correction
  • Automated Averaging
  • Display of Modulation Indices

Audio Analyzer

  • Level RMS
  • THD+N
  • Frequency
  • Scope
  • Spectrum Analysis (1/3, 1/1 octave)
  • FFT Analysis
  • 1/12 Octave Analysis (optional)
  • Pass/Fail Measurements (optional)


  1. XL2-Leaflet
  2. XL2-Data-Explorer-Leaflet
  3. XL2-Manual
  4. XL2-Specifications
  5. NTi-Audio-Outdoor-Noise-Monitoring-Solutions-Leaflet
  6. TestReport-XL2-Analyzer-InAVate-Oct12
  7. TestReport-XL2-Analyzer-CX-Magazine-Jun15
  8. NTi-Audio-Full-Line-Catalog
  9. XL2-M4260-IEC61672-Class-2-Conformity-Certificate


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