NTi Audio XL2 Sound Level Meter - Manual (Page 210)

210
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 in the
range of 5 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 »
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 in accordance with ISO 1996 »
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
Acoustic Analyzer
FFT Analysis
Real-time FFT with actual level, L • eq, Lmin, Lmax
Level resolution: 0.1 dB •
Ranges: 7 Hz - 215 Hz, 58 Hz - 1.72 kHz, 484 •
Hz - 20.5 kHz with 142 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
Reverbera-
tion
Time RT60
1/1 octave bands results from 63 Hz - 8 kHz, •
based on T20
Optional: 1/3 octave bands results from •
50 Hz - 10 kHz, based on T20
Range: 10 ms - 14 seconds •
Measurement in accordance with ISO 3382 using •
Schroeder-method
Test signal: Impulse source or gated pink noise •
generated by the MR-PRO, MR2 or the included
NTi Audio Test CD
Delay Time Propagation delay between electrical reference •
signal and acoustic signal using the internal micro-
phone
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