NTi Audio XL2 Specifications

262

Specifications

23. Technical Data XL2

All specifications are according to the IEC61672 standard. Oth­er standards are listed the corresponding specifications.

Sound Level Meter

Certified
Product Con­figurations
Class 1

Product Con­figurations
Class 1

XL2-TA, M2230 microphone and Shroud MXA01 •
form an integrating sound level meter with type
approval in accordance with class 1 requirements
of IEC 61672 and ANSI S1.4

XL2 with M2230 microphone •
Class 1 in accordance with IEC 61672 and
ANSI S1.4

XL2 with M2211, M2215 microphone •
Class 1 frequency response in accordance with
IEC 61672 and ANSI S1.4

These specifications apply for operation with the
microphone attached using the Shroud MXA01 or
the microphone detached using the ASD cable. This
prevents possible acoustic reflections from the XL2
housing and ensures a high measurement accuracy
in accordance with the standards IEC 61672 and
ANSI S1.4.

Conforms
with Stan­dards

Weighting Frequency weighting: A, C, Z (simultaneous) •

Level Details Measurement bandwidth (-3dB): 4.4 Hz - 23.0 kHz •

•

IEC 61672:2013, IEC 61672:2003,
IEC 61260:2014, IEC 61260:2003,
IEC 60651, IEC 60804
SMPTE ST 202:2010, ISO 2969:2015 •
China: GB/T 3785:2010, GB/T 3241, GB 3096-2008, •
GB 50526, GB-T 4959
Germany: DIN 15905-5, DIN 45657:2014, DIN

•
45657:2005, DIN 45645-2, optional: DIN 45645-1

•

Japan: JIS C1509-1:2005, JIS C 1513 class 1,
JIS C 1514 class 0
Switzerland: V-NISSG •
UK: BS 4142:2014, BS 5969, BS 6698

•

•

US: ANSI S1.4:2014, ANSI S1.43, ANSI S1.11:2014
International IEC standards are adopted as European

•
standards and the letters IEC are replaced by EN.
XL2 conforms to these EN standards.
WELL Buildings, LEED Green Building •

•

FGI Facility Guidelines Institute

Time weighting: Fast, Slow, optional: Impulse •
(simultaneous)

Level resolution: 0.1 dB •
Internal noise: 1.3 µV A-Weighted •

Product Con­figurations
Class 2

XL2 with M4261 microphone •
Class 2 in accordance with IEC 61672 and
ANSI S1.4

263

Specifications

Audio
Recording

Measure­ment
Ranges with
different
microphones

Linear Mea­surement
Range acc.
IEC61672 /
ANSI S1.4

Default •

Recording of compressed wav-files

»

(ADPCM - 4 bit, 24 kHz)

»

a new wav-file starts every 12 hours
(max. wav-file size 512 MB)
Bandwidth: 2.0 Hz - 10.2 kHz »

Optional: Extended Acoustic Pack

•
Recording of linear wav-files (24 bit, 48 kHz) »

»

a new wav-file starts every 1 hours
(max. wav-file size 512 MB)
Bandwidth: 2.0 Hz - 23.6 kHz »

Optional: NoiseScout - Managed Mode

•

»

Recording of compressed wav-files
(4 bit, 12 kHz)
Bandwidth: 2.0 Hz - 5.1 kHz »
requires activated “NoiseScout 365” or »
“Data Day Credits”

Audio files include meta data (scaling, time, ...) in •
Broadcast Wave Format BWF according to EBU
TECH 3285

XL2+M2230: 17 dB(A) - 137 dB •
XL2+M2215: 25 dB(A) - 153 dB •
XL2+M2211: 21 dB(A) - 144 dB •
XL2+M4261: 27 dB(A) - 146 dB •

@ typical microphone sensitivity

XL2+M2230: 24 dB(A) - 137 dB •
27 dB(C) - 137 dB
XL2+M2215: 33 dB(A) - 153 dB •
XL2+M2211: 29 dB(A) - 144 dB •
XL2+M4261: 33 dB(A) - 146 dB •

@ typical microphone sensitivity

Stabilization
Time

Integration
Time

Display
Measure­ment
Ranges

< 10 seconds

•

Minimum: 1 second
Maximum: 100 hours minus 1 second

•

Three level ranges depending on the microphone
sensitivity with manual setting. For example:

M2230 @ sensitivity = 42 mV/Pa •

»

LOW, lower level range: 0 - 100 dBSPL
MID, mid-level range: 20 - 120 dBSPL »
HIGH, upper level range: 40 - 140 dBSPL »

M2215 @ sensitivity = 8 mV/Pa

•
»

LOW, lower level range: 20 - 120 dBSPL
MID, mid-level range: 40 - 140 dBSPL »
HIGH, upper level range: 60 - 160 dBSPL »

M2211 @ sensitivity = 20 mV/Pa •

LOW, lower level range: 10 - 110 dBSPL

»
»

MID, mid-level range: 30 - 130 dBSPL
HIGH, upper level range: 50 - 150 dBSPL »

M4261 @ sensitivity = 16 mV/Pa •

LOW, lower level range: 10 - 110 dBSPL »
MID, mid-level range: 30 - 130 dBSPL

»
»

HIGH, upper level range: 50 - 150 dBSPL

264

Specifications

Residual
noise in [dB]
@ S =
42 mV/Pa
of XL2
without
measure­ment
microphone

Frequency weighting A •

Level range L
LOW 4 17
MID 18 31
HIGH 43 55

Frequency weighting C •

Level range L
LOW 3 16
MID 17 30
HIGH 41 55

Frequency weighting Z •

Level range L
LOW 7 20
MID 21 34
HIGH 46 58

eq

eq

eq

L

L

L

peak

peak

peak

Measure­ments

Real-Time
Analyzer
RTA

SPL actual, Lmin, Lmax, Lpeak, Leq, Lp •
Gliding LAeq and LCeq with selectable time win- •
dow from one second to one hour
(=running Lxeq or sliding Lxeq with x= A or C)
All measurement results simultaneously available •
Correction value measurement wizard based on •
LAeq, LCeq and LCpeak
Noise exposure level LEX with post-processing •
Logging all data or subsets in selectable intervals •
Recording of voice notes •
Monitoring of sound levels that exceed limits •
Digital I/O interface for external peripherals control •

Conforms with class 1 of IEC 61260:2014 and •
ANSI S1.11-2014
1/1 octave band display: 8 Hz - 16 kHz •
sub ranges 8 Hz - 4 kHz or 31.5 Hz - 16 kHz
displayed with A/Z broadband levels at one glance
1/3 octave band display: 6.3 Hz - 20 kHz •
sub ranges 6.3 Hz - 8 kHz or 20 Hz - 20 kHz
displayed with A/Z broadband levels at a glance
Level resolution: 0.1 dB •
Measurement Units: Volt, dBu, dBV and dBSPL •
Band pass filters (base 10) conform with class 1 of •
IEC 61260:2014 and ANSI S1.11-2014

1/1 octave spectrum: > 16 Hz band »

1/3 octave spectrum: > 16 Hz band »
Wide band levels simultaneously •
Frequency weighting: X-Curve @ 500 seats in ac- •
cordance with SMPTE ST 202:2010 and
ISO 2969:2015
Capturing of a single reading into the internal •
memory for comparative measurements
Leq logging •

265

Specifications

Remote
Measure­ment
(optional)

Querying measurement data online via the USB
interface of the following functions:

Sound level meter and spectrum analyzer •
SLMeter/RTA
FFT analyzer •
RT60 reverberation time •
Audio analyzer RMS/THD+N •
High-resolution spectral analyzer 1/12 Oct + Tol •

Functions of
Extended
Acoustic
Pack
(optional)

SLMeter/RTA function •

Recording of linear wav-files (24 bit, 48 kHz) »

a new wav-file starts every 1 hour (max. wav-file

size 512 MB)

Percentiles for wide band, 1/1 and 1/3 octave »

spectrum

Flexible setting from 0.1% to 99.9% ­Sampling: every 1.3 ms ­Wide band: in 0.1 dB wide classes, based on ­sampling Lxy (x= A, C or Z, y= F, S or EQ1”)
1/1 and 1/3 octave spectrum: in 1.0 dB wide ­classes, based on Lxy (x= A, C or Z, y= F or S)
Dynamic range: 140 dB -

Sound Exposure Level LAE
100ms logging »
RTA logging of Lmin and Lmax »
Event-triggered audio and data recording »
Time weighting: Impulse »
(LxI, LxIeq with x= A, C, Z)
True peak level in 1/1 and 1/3 octave resolution »
Clock-Impulse Maximum Level (TaktMax) and »
values as specified in DIN 45645-1
Impulsiveness detection in accordance with »
BS4142:2014 and NordTest ACOU 112

FFT function •

High-resolution Zoom-FFT with selectable fre- »
quency ranges and resolution up to 0.4 Hz in the
range of 5 Hz to 20 kHz
Recording of linear wav-files (24 bit, 48 kHz) »

RT60 function •

Reverberation time RT60 in 1/3 octave resolution »

1/12 octave Spectral Analyzer •

Recording of linear wav-files (24 bit, 48 kHz) »

266

Specifications

Functions of
Spectral
Limits
Option
(optional)

SLMeter/RTA function •

True peak level in 1/1 and 1/3 octave resolution »

FFT function •

High-resolution Zoom-FFT with selectable fre- »
quency ranges and resolution up to 0.4 Hz
Sound mode: 5 Hz to 20 kHz »
Vibration mode: 1 Hz to 20 kHz »

1/12 octave function •

High-resolution RTA function “1/12 Oct + Tol” »
Selectable 1/1, 1/3, 1/6 and 1/12 octave spectral »
resolution
Frequency band listening at rear speaker »
Sound Mode: 11.5 Hz to 21.8 kHz »
Vibration mode: 0.73 Hz to 1.36 kHz »

FFT and 1/12 octave function •

Capturing of multiple readings into the internal »
memory
Comparing measurement results against cap- »
tures with relative or absolute curve display
Comprehensive tolerance handling with toler- »
ance masks based on captures for passed/failed
measurements
Export and import of tolerance and capture files »

Noise Curves •

Noise Rating NR according to ISO/R 1996-1971 »
Noise Criteria NC »
in accordance with ANSI S12.2-2008 and -1995
Room Noise Criteria RNC »
in accordance with ANSI S12.2-2008
Room Criteria RC »
in accordance with ANSI S12.2-1995
Preferred Noise Criteria »
in accordance with ASA 1971

Reporting and Analysis Software

Data
Explorer
(optional)

Sound
Insulation
(optional)

Room
Acoustics
(optional)

Enables the import of measurement data into the •
XL2 Data Explorer software
Powerful data processor for easy and fast analysis •
of sound level measurement data on PC

Enables the import of RTA and RT60 measure- •
ment data in 1/3 octave band resolution into the
XL2 Sound Insulation Reporter software
Software provides all tools for fast data analysis •
and standardized reporting of airborne, impact and
facade sound insulation measurements on PC
Standards ISO 16283, ISO 140, ISO 717, ISO •
10140, DIN 4109, Document E, ASTM E336,
ASTM E413, ASTM E1007, ASTM E989, ASTM
E966, ASTM E1332, GB/T 19889, SIA 181

Frequency response spectrum and Noise Curves •
Room acoustic simulation according to Sabine or •
Eyring
Import of own sound absorber database and toler- •
ances
Stanards GB 50371, IEC 61260, ANSI/ASA S12.2- •
2008, ANSI/ASA S12.2-2008,DIN 15996:2008, ISO
R 1996-1971, ASR A3.7:2018, DIN 18041:2016,
ISO 3382-1:2009, ISO 3382-2:2008, ÖNORM B
8115-3:2015, ASTM C423-17, ISO 354:2003

267

Specifications

Sound
Power
(optional)

Enables the import of RTA and RT60 measure- •
ment data in 1/1 and 1/3 octave band resolution
into the XL2 Sound Power Reporter software
Software provides all the standard reports for •
sound power measurements
Standards ISO 3741, ISO 3744, ISO 3746, ANSI- •
ASA S12.51, S12.54, S12.56

Acoustic Analyzer

FFT Analysis Real-time FFT with actual level, L •

•

•

Reverbera­tion
Time RT60

, L

min

, L

max

Level resolution: 0.1 dB •

eq

Frequency Band Ranges: 7 Hz - 215 Hz,
58 Hz - 1.72 kHz, 484 Hz - 20.5 kHz with 143 fre­quency bins shown on display
Measurement Units: Volt, dBu, dBV and dBSPL
Optional: High-resolution Zoom-FFT with select- •
able frequency ranges and resolution up to 0.4 Hz
in the range of 5 Hz to 20 kHz
Optional: Capture and tolerance function with mul- •
tiple readings for comparative measurements and
passed/failed analysis

Conforms with ISO 3382 and ASTM E2235 •
1/1 octave bands results from 63 Hz - 8 kHz, •
based on T20 and T30
Optional: 1/3 octave bands results from •
50 Hz - 10 kHz, based on T20 and T30
Range: 10 ms - 30 seconds •
Minimum RT60 (typical) •

< 100 Hz: 0.3 second »
100 - 200 Hz: 0.2 second »
> 200 Hz: 0.1 second »

Measurement based Schroeder-method •
Test signal: Impulse source or interrupted pink •
noise generated by the MR-PRO, MR2 or the in­cluded NTi Audio Test CD

268

Specifications

Polarity Checks polarity of speakers and line signals •

Delay Time Propagation delay between electrical reference •

Noise
Curves

Positive/Negative detection of wideband and •
individual 1/1 octave bands through internal micro­phone or XLR/RCA connector
Test signal: NTi Audio polarity test signal gener- •
ated by the MR-PRO, MR2 or the included NTi
Audio Test CD

signal and acoustic signal using the internal micro­phone
Range: 0 ms - 1 second (0 m - 344 m) •
Resolution: 0.1 ms •
Test signal: NTi Audio delay test signal generated •
by the MR-PRO, MR2 or the included NTi Audio
Test CD

Noise Rating NR according to ISO/R 1996-1971 •
Noise Criteria NC •
in accordance with ANSI S12.2-2008 and -1995
Room Noise Criteria RNC •
in accordance with ANSI S12.2-2008
Room Criteria RC •
in accordance with ANSI S12.2-1995
Preferred Noise Criteria •
in accordance with ASA 1971

Application range of measurement microphones: •

M2230: down to NC15 »
M2211: down to NC15 »
M4261: down to NC25 »

1/12 Octave
Analysis
(optional)

Cinema
Meter
(optional)

Actual level, L •
Selectable 1/1, 1/3, 1/6 and 1/12 octave spectral •
resolution

•

Measurement Units: Volt, dBu, dBV and dBSPL
Band pass filters (base 10)

•
Capturing of multiple readings into the internal •
memory
Comparing measurement results against captures •
with relative or absolute curve display
Comprehensive tolerance handling •
Creating tolerance masks based on captures for •
passed/failed measurements

Measurements in 1/3 octave resolution in accor- •
dance with SMPTE ST 202:2010 and SMPTE RP
200:2012
An interactive assistant guides the user through •
dedicated measurement procedures.

, L

min

max, Leq, Leq1”, Leq4”