Re-Constitution Of Wave File Data - Acoustic Research Ngara User Manual

Statistical analysis is performed on an entire logging session that can be found locally on the host computer. This
can be either after a detailed download, or by browsing the contents of the USB disk used to record the session.

5.10.5 Re-constitution of wave file data

A Ngara session directory containing both CSV and PCM data can be scanned, with all range switching removed
from PCM files.
Disk -> Reconstitute Wave Files
The recorded 48kHz wave files are linear from the noise floor of the instrument to approximately 97dB @ 1kHz.
From 97dB to 120dB the gain has been reduced to allow 100dB of dynamic range within 16-bits.
In order to see the full dynamic range within the wave file, the user is required to reconstitute each wave file. This
involves the conversion of each sample into 32 bit values.
Calibration factors are used from the stored data to reconstitute the 48kHz file to 32-bits, allowing for a linear 100dB
dynamic range.
Version — 25-7cd7566
Figure 39: Statistics Configuration
Figure 40: PCM Reconstitution
Ngara
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