Larson Davis 831C-FFT, Reference Manual

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SoundAdvisor Model 831C Understanding Recording Settings and Sound Quality 157
19.5 Understanding Recording Settings and Sound Quality
In this section:
• 19.5.1 Understanding Resolution, Peak Overload, and Range
• 19.5.2 Choosing a File Format for Sound Records
19.5.1 Understanding Resolution, Peak Overload, and Range
About Resolution Values
Sound recordings are saved with 16-bit resolution which provides a measurement range of
about 90 dB. This means that the 831C is capable of recording sound signals with
amplitudes no more than 90 dB below the level at which the selected range will overload.
Adjusting Peak Overload
During calibration, the 831C automatically calculates the peak overload based on the
current microphone type. To ensure the calibration will be accurate, do the following:
Step 1.
Press
Tools
3

Calibrate

Settings
, and reference section 5.4 Calibrating
Your SoundAdvisor 831C . The 831C automatically calculates the sound
recording range based on the Peak Overload value. as shown in Figure 19-6 .
FIGURE 19-6
Step 2.
Go to
Tools
3

Setup Manager

SLM tab
.
Step 3.
Verify or edit the
Gain
setting at either
0 dB or 20 dB.
Step 4.
Go to
Tools
3

Setup Manager

Sound tab
.
Step 5.
Verify or edit the selection for
Normal
or
High Range
. This results in different
values for upper and lower limits for
any given microphone. We recommend using the
Normal
range for sound
recordings unless you anticipate that recorded sounds will exceed 110dBA. In
that case, choose
High
range.
19.5.2 Choosing a File Format for Sound Records
Step 1.
To choose compressed or uncompressed sound records on the 831C, press
Tools
3

Setup Manager

Sound tab .