NTi Audio Acoustilyzer AL1 - Manual (Page 10)

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Acoustilyzer Functions
The Acoustilyzer AL1 features many
measurement functions, which are
accessible through a drop down menu bar.
The base element is the cursor (inverted
area), which may be navigated through the
various functions by using the cursor keys.
• SPL/RTA: Sound Pressure Level (SPL) & time-averaged sound
pressure level (Leq) measurements of wideband values.
Real Time Analysis (RTA) of octave or ⅓ octave values
• RT60: Reverberation time with 1/1 octave band resolution
• FFT: Real-time zoom Fast Fourier Transform (FFT)
• POLARITY: Polarity measurement of speakers and line signals
• DELAY:
Delay time measurements between speakers
• RMS/THD: Root Mean Square (RMS) level and Total Harmonic
Distortion (THD) measurements
• STI-PA: Speech intelligibility measurement is visible after
Speech Transmission Index for Public Address systems
(STI-PA) license key has been activated
• CALIBRTE: Calibration of connected measurement microphone
Easy Operation
Unit selected with cursor to
change setting
All selectable settings may be adjusted
simply by
• Pressing the enter key to select the
required value.
• Alternatively, for longer selection lists,
the chosen field flashes. Now s elect
the required value with the cursor keys.
Confirm the setting by pressing the enter
key again.