ACOUSTIC MEASUREMENT SOLUTIONSXL3 ACOUSTIC ANALYZER

CLASS 1 SOUND LEVEL METER
1 / 3 - O C TAV E S P E C T R U M A N A LY Z E R
S T I PA A N A LY Z E R
R E V E R B E R AT I O N T I M E A N A LY Z E RB U I L D I N G A C O U S T I C S A N A LY Z E R

Made in Switzerland

www.nti-audio.com

New Technologies
State-of-the-art hardware and software technologies,
high-performance
processors
andenoughmemory
to cover all requirements, make the XL3 the idealsolution for experts. The unit offers a wide single range foreasy usage, which is covered without any range switching.

Smart User Interface
The high-resolution 4.3-inch color touch display allows
intuitive control of all measurement functions. All common
operating functions are also accessible on the keypad below
the display.

Access to measurement data. Anywhere.
Anytime.

XL3 remote access via mobile device

2

The XL3 is fully network-compatible and the built-in web
server allows operation and data access from any mobiledevice. The sound level meter can communicate and upload
data to the cloud via the USB interfaces and WLAN. The
XL3 is fully network-capable and can be connected with USBor Wi-Fi via an external router to the internet at any time
for upload of data to the cloud. The binary streaming format
facilitates compact data transmission over cellular networks.
In addition to a large SD memory card, the XL3 also
supports the connection of an external hard disk. A weather
station can be connected directly to the XL3 via theSDI-12 interface.

XL3 – The Professional Sound Level MeterSound Level MeterSpectrum
The Class 1 Sound Level Meter
records numerous levels in parallel over the entire measurement
period. At the same time the XL3logs the frequency spectrum and, if
desired, records the audio as a wav
file.
All stored measurement data isavailable in simple text format.
Professional data evaluation andfurther calculations are carried out
in the optional Data Explorer
PC Software.

Level Time History

The XL3 determines the frequency
spectrum with a Class 1 filter bankin octave or 1/3 octave resolution
between 6.3 Hz and 20 kHz. Allvalues are calculated in parallel. Inaddition, two spectra can be selected
and displayed simultaneously. Boththe level and the frequency axes canbe freely zoomed and scrolled.

STIPA
In the Sound Level Meter function,
the Level Time History is available inaddition to the broadband levels andspectrum views. Two selectable levelvalues are displayed over time. This
allows a detailed view of the level
curves in three choosable time resolutions. The level data is optionallyrecorded and displayed in 100ms or
1s intervals. This function is includedin the Extended Noise Measurement
option.

Reverberation TimeThe XL3 Analyzer, with the STIPA Option installed, measures the speech
intelligibility according to the latest revision of standard IEC 6026816:2020 (edition 5) and older editions.
It offers ambient noise correction andautomated averaging for repeatedmeasurements. The XL3 displays thespeech transmission index (STI) andthe common intelligibility scale (CIS),
accompanied by the individual levels
and modulation indices of the sevenoctave bands.

Building Acoustics
The standard reverberation timemeasurement determines T20 or T30
in octave bands from 63 Hz - 8 kHz.
The values of a measured position orof an entire room are averaged onthe XL3. The optional Room Acoustics
Package extends the Acoustic
Analyzer to 1/3 octave bandresolution, T15 or EDT. Use
either an impulse source or an interrupted pink noise as the test signal.

The optional Building Acoustics
module enables direct determinationof airborne and impact soundinsulation, according to ISO 16283
and other standards, while you
are on site. Measure in the source and receiving rooms and see
the sound insulation results on thedisplay. A detailed measurement
report is easy to create with theoptional Sound Insulation Reporter
PC Software.

3Connected – Always and Everywhere

The XL3 has a built-in web and data server accessible via the instrument's
Wi-Fi or LAN connection. Connect via the Sound Level Meter's IP
address (within the local network), or by using the authorized user via theNTi Connect application, and control all the functions of your Sound Level
Meter, from wherever you are.
All recordings, as well as current noise levels, audio and weather data, canbe accessed at any time via the NTi Connect platform or on-site throughthe USB-C connection. Additionally, measurement data, reports and audio
files can also be automatically saved to a cloud drive.

4

Swiss Precision WorkFor convenient operation, the Sound Level Meter uses the latest processor technologies. Powerful hardware in a rugged housing provides precise 96 kHz data sampling in 32 bit resolution.
With a frequency range of 0.3 Hz – 40 kHz, the XL3 is ready for infra- and ultrasonic measurements. Not to forget the wide level range without switching and the automatic sensor detectionthat reads the electronic data sheet of the connected measurement microphone. The XL3 isindeed the Swiss Army knife of Sound Level Meters for the professional.

5Optional Extensions
Firmware Packages

Software Products

EXTENDED NOISE MEASUREMENTDATA EXPLORER SOFTWARE

LAE, Pulse Time Weighting, Percentiles, 100ms Logging, Uncompressed WAV Recording, Level Time
History and more.
SOUND INSULATION

Easy and fast analysis, post-processing
and visualization of sound level recordings.

SOUND INSULATION REPORTER SOFTWARE

Direct determination of airborne sound, impact soundand facade sound insulation according to ISO 16283
and numerous other standards.
EXTENDED ROOM ACOUSTICS

Analysis, post-processing and measurement reports of sound insulation measurements.
ROOM ACOUSTICS REPORTER SOFTWARE

Reverberation time measurement in one-third octave
resolution. EDT, T15, T20 and T30. Calculation of theroom average. Audio recording.

Post-processingandmeasurement
reports for room acoustics measurements.
(Reverberation time, spectrum, noisecurve)

STIPA OPTION
Speech intelligibility measurements according to thelatest revision of standard IEC 60268-16:2020 (ed. 5)and older editions, as well as numerous referring standards.
API PROGRAMMING INTERFACE
Full control over measurement configuration and data.
Easy integration into customized software solutions.

AC CE S S ORI E S
Calibration
Certificate

Precision Calibrator# 600 000 388

Calibration Certificate# 600 000 018

GPS Mouse for XL3# 600 000 358

XL3 display protection# 600 000 744

AUWeatherproof case IP43/65# 600 000 704/05

6Backpack# 600 000 706

System case# 600 000 701

DIO

Ever-ready Pouch# 600 000 735

Technical Specifications
SOUND LEVEL METER XL3+M2230 / XL3+M2340
Accuracy· Class 1 according to IEC 61672 and ANSI S1.4
· Type-Approved configuration· System Self-test (CIC) with M2340 microphone

Level· Frequency weighting: A, C, Z
· Time weighting: Slow, Fast
· Min, Max, Peak, EQ, EQT, Taktmax

Functionality· Single measurement range: 17 dBA – 137 dB· Frequency range: 4.3 Hz – 23 kHz· Level limits· Logging interval 1 s· Voice notes (planned)

Audio· Compressed (ADPCM), 24 kHz, 12 kHz

Extended Noise
Measurement
Option· Sound Exposure Level LAE· Time weighting: Impulse· Percentile statistics L% (broadband, spectrum)· Logging 100 ms (broadband, spectrum)· Audio: 24, 32 bit with 12, 24, 48, 96 kHz· Level-time history graph, Back-erase (planned),Pre-trigger (planned)

SPECTRAL ANALYZER
Accuracy· Class 1 according to IEC 61260 and ANSI
S1.11Frequency
range· Octave band: 8 Hz – 16 kHz· 1/3 octave band: 6.3 Hz – 20 kHz

Functionality· Filter base 10· Leq with frequency weighting A, C, Z
· Spectrum logging Leq, Lmin and Lmax

REVERBERATION TIME

· Automated averaging of measurements· Modulation indices and individual band level
results with error indicator
BUILDING ACOUSTICS (optional)
Standards

Airborne and impact sound insulation according to:· ISO 16283 and ISO 717· Document E· ASTM E336
· SIA 181 (planned)· DIN 4109 (planned)

Functionality· Results shown on XL3· Averaging of source and receiving room
· Flatness of adjacent 1/3 octave band (planned)· Requires Sound Insulation Option

Results· D, Dn, DnT, and R’· Chart and table

INTERFACESInput· XLR balanced with 48 V phantom power

Network· Wi-Fi integrated (2.4 GHz)· LAN via USB adapter· USB-C as host or slave, USB-A as host· File-Push Service to Cloud Drive· Data and website access via USB· Web server, ftp, ntp· 4G/5G via optional external gateway· Remote access connect.nti-audio.com

API-interfaceOption· Data and audio streaming· Control, configuration & data retrieval

Digital I/O· Connection of accessories· SDI-12 and 1-Wire

Accuracy· ISO 3382 and ASTM E2235· Schroeder backward integration

MemoryFunctionality· Octave band: 63 Hz – 8 kHz· Measurement parameters T20, T30· Impulse and interrupted noise source· Automatic averaging· Removable SD card with 32 GB memory· Supports external hard disk

FurtherFunctionalities

Extended RoomAcousticsOption· 1/3 octave band: 50 Hz – 10 kHz· T20, T30, T15, EDT simultaneously· Minimum trigger level· Automatic room averaging of multiple positions· Audio recording· Decay curve (planned)· Automatic microphone detection (ASD)· Built-in microphone for voice notes· Loudspeaker· Headphone/line output: 3.5 mm jack, stereo

Power supply· Removable battery (Li-Po)· Battery life > 8 hours· Power supply 9 VDC, USB-C

STIPA ANALYZER

GENERAL
Display· 4.3” IPS color display with capacitive touch· 480 x 800 pixels

Standards· IEC 60268-16 (ed. 2, 3, 4 and 5)
and others that refer to this IEC standard

Mechanics· 1/4" tripod mount· Device standFrequency
range· Octave band: 125 Hz – 8 kHz

Dimensions· 210 x 85 x 45 mm, 8.3 x 3.3 x 1.8" (L x W x H)

Modulation
Frequencies· 0.63 Hz – 12.5 Hz in 1/3 octave resolution

Weight· 510 g, 18 oz

FurtherFunctionalities· Single value STI and CIS test result· Ambient noise correction

Scope ofdelivery· XL3, battery, power supply, USB-C/USB-C cable· and USB-C/USB-A adapter

more information is listed in the product specifications

7XL3
info@nti-audio.com

All information is non-binding and subject to change without notice.
XL3, M2340 and M2230 are trademarks of NTi Audio AG08.24

www.nti-audio.com