NTi Audio
XL2 Audio and Acoustic Analyzer

Acoustic and Audio Analyzer

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

Introducing XL2 Acoustic and Audio Analyzer

Measurement Functions

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)

Speech Intelligibility 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)

Flexible User Interface

The flexible user interface may be configured for the demands of advanced and basic users. Advanced users may access all menus, settings and store their preferred measurement configurations. Basic users choose from a set of preconfigured profiles at the start up with fixed instrument settings according the application requirements. This ensures accurate measurements in any situation.

XL2 Sound Level Meter

Order Information

XL2 with M4260 Measurement Microphone

XL2 + M2230

XL2 Audio and Acoustic Analyzer
with M2230 Measurement Microphone
(Class 1 certified).
NTi Audio #: 600 000 355

XL2 + M2211

XL2 Audio and Acoustic Analyzer
with M2211 Measurement Microphone
(Class 1 frequency response).
NTi Audio #: 600 000 351

XL2 + M4260

XL2 Audio and Acoustic Analyzer with M4260 Measurement Microphone, Class 2.
NTi Audio #: 600 000 340

XL2 Audio and Acoustic Analyzer

XL2 without measurement microphone.
NTi Audio #: 600 000 330

Get more Information

Buy at the web shop or contact NTI Americas .

Sound Level Meter
Real Time Analyzer
Audio Analyzer
FFT Spectrum Analyzer
STIPA Analyzer

Contact NTi Audio

NTI Americas Inc.
Tigard, Oregon
Thomas E. Mintner
+1 503 684 7050

Customer Comments

I Love It
“The XL2 is currently the world’s most versatile hand-held acoustic and audio analyser. I can do so much with it, and just love it! And in many ways, the associated Data Explorer software is much more versatile and easier to use than other leading industry equivalents.”
Glenn Leembruggen,
Acoustic Directions
, Australia

Very Simple to Use
"I must say that the instrument and the software are brilliant, and very simple to use, even for an old fogey like me."
Owen Clingan, UK

Better price with more versatility
"I am happy that you keep on developing new applications and uses for the XL2, it is quite a convenient and powerful tool. In my opinion it is a serious competition for the traditional sound level meters at a better price and with more versatility. The Type Approval is an important step forward in the acceptation of the system; even in situations where type approval is not really needed, it helps avoiding discussions on the validity of the measurements."
Ben Kok, www.benkok.com, Netherlands

XL2 Data Explorer Software
"With regards to analyzing the recorded noise data: The idea of hovering over the marker text or locking the set of them is absolutely brilliant for assessing the tonality of a marked section. I could not have thought of a better system. And the percentile calculator letting you choose any marker, filter band or level parameter is just perfect."
Jason Dixon, www.instrulabs.com.au, Australia