NTi Audio XL2 Sound Level Meter - Manual (Page 194)

194
Further Information
Options and Accessories
The System menu shows the installed options on the XL2.
The following options extend the measurement functions of
the XL2:
Speech Intelligibility STIPA
NTi Audio #: 600 000 338
The XL2 Analyzer measures the speech intelligibility ac-
cording to the latest revision of standard IEC 60268-16:2011
(edition 4) and older editions. It includes ambient noise cor-
rection and automated averaging of measurements. The XL2
displays the measurement results as STI or as CIS results, ac-
companied by the individual levels and modulation indices of
the seven octave bands.
The measurement results are acquired from the dedicated
STIPA test signal source:
NTi Audio TalkBox, acoustic signal generator •
required for audio systems with voice microphones, thus
measuring the complete signal chain
Minirator MR-PRO, test signal generator
•
required for audio systems with line inputs
STIPA Test CD (included)
•
Extended Acoustic Pack
NTi Audio #: 600 000 339
The Extended Acoustic Pack offers the following additional fea-
tures for sound level- and acoustic measurements.
SLMeter/RTA function •
Recording of linear wav-files (24 bit, 48 kHz) -
Percentiles for wide band and spectrum with flexible set- -
ting from 1% to 99%
Sound Exposure Level L
- AE
100ms logging -
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
FFT function •
High-resolution Zoom-FFT with selectable frequency -
ranges and resolution up to 0.4 Hz in the range of 5 Hz to
20 kHz
RT60 function •
Reverberation time RT60 in 1/3 octave resolution -