Measurement functions – NTi Audio Acoustilyzer AL1 User Manual
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4. Measurement Functions
Overview
Function
Test
Result
Screens
Test Features
SPL/RTA
Sound Level Meter
Sound pressure level SPL, MAX/MIN SPL, Leq,
LCpeak
Real Time Analyzer
1/1 and 1/3 octave real time spectrum analyzer
showing SPL, MAX/MIN SPL & Leq per band
RT60
Reverberation Time
in octave band resolution based on T20 results
Reverberation Time
detailed test results listed in seconds, including
correlation factor
FFT
Real-time Zoom FFT
POLARITY
Polarity Test
of acoustic speaker or electrical line signals
DELAY
Delay Time
Propagation delay measurement between
electrical reference and acoustic signal
RMS/THD
Electrical Measurements
Level RMS, THD+N, Frequency
STI-PA
Speech intelligibility
with STI or CIS values. V
isible after STI-PA
license key has been activated
Speech intelligibility
Individual Leq and STI-PA modulation indices of
test frequency bands
CALIBRTE
Calibration Menu
for external measurement microphones,
sensitivity set by default to NTi Audio MiniSPL