[AKD7756-HF]
<KM101400>
2010/06
- 10 -
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Noise Canceller
The noise canceller sets optional noise attenuation for 6 divided voice bands.
This noise cancel adjustment is made with the real time NC parameter adjustment function of GUI software as shown
in the following diagram.
Figure 6. Control S/W [NC Tune] tab screen
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Parameter Adjustment
Set the parameters in CRAM to adjust Hands Free setting.
In this instruction manual, CRAM addresses are expressed as C (xx). Address = 4Ch is shown below as an example.
Example:
C(4Ch)
CRAM Address 4Ch
A corresponding example to the CRAM file is shown below.
Figure 7. AK7756 CRAM File Format
Figure 7 shows that 0710h is stored to C(0004Ch) when this file is downloaded.
The noise attenuation of each band
is adjusted. Unit = [dB]
GAIN0= Lowest frequency band
GAIN5= Highest frequency band
Sensitivity Adjustment
When it is high, sensitivity decreases,
and stability improves.
When it is low, sensitivity improves,
and stability decreases.
