Soft dB Opus Suite Building Acoustics Module Airborne Sound Isolation between Rooms ASTM E 336_ISO 140-4 - Manual (Page 14)

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6 Setup Interface
Figure 2: Setup interface
Input Setup
The input channel used for the measurements
The available input types are AC and ICP sensors.
Selection of the dynamic range.
For a microphone sensitivity of 50mV/Pa.
- Low Range: 25 to 119 dBA
- High Range: 37-130 dBA
Concerto: the input 1 and 2 have two range settings (Low or High)
while inputs 3 and 4 have a single fixed range (Low).
Alto-6ch and Itrack: only the low range is available.
The sensor sensitivity can be entered manually or the Calibration
interface can be used (see section 0, p.15).
The dB reference is the unit reference from which the decibel (dB) is
calculated.