NTi Audio Acoustilyzer AL1 - Manual (Page 86)

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8. Technical Specification
Measurements
• Sound Pressure Level
• Real Time Analyzer
• Zoom FFT
• Reverberation Time
• Delay Time
• Level RMS, Distortion THD+N
• Frequency
• Polarity Test
• Speech Intelligibility STI-PA (optional)
Sound Pressure Level
• SPL, Leq, LCpeak, Lmin, Lmax in accordance with IEC 61672
• Timer for single and repeated measurements
• Dynamic range (using MiniSPL): 30 - 130 dBSPL
A
• Filters: Flat, A, C, X-Curve -1 , RLB (Broadcast Loudness)
• Logging of SPL/RTA results into AL1 memory
• Wideband and RTA values simultaneously available
Real Time Analyzer
• 1/3 or full octave band resolution, class 0 filters
• SPL, Leq and Max-Min display per band
Reverberation Time
• 1/1 Octave band resolution, 63 Hz - 8 kHz,
based on T20 results, according to ISO3382
• 1/3 Octave band resolution with post-processing
• Automatic averaging with individual result readout and storage
• Source signal: Gated pink noise (from Test-CD or Minirator)
Zoom FFT
• Real-time Zoom FFT with 50% overlapping, 93 Bins
• Frequency Range: 10 Hz - 20 kHz
• Resolution: 187.5 Hz to 0.73 Hz
Delay Time
• Propagation delay between electrical and acoustic signal
input using built-in mic. Resolution < 0.1ms, max time: 1 s
• Dedicated test signal: NTi Audio chirp (from Test-CD or Minirator)