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Start
Noise cancellation off
Noise cancellation
On
Wait 3 Seconds
No
Yes
DSP button
pressed?
2 tone beep
Normal operation
Wait 3 Seconds
Start
Noise cancellation
On
Wait 1.5 Seconds
Noise cancellation off
Highest
Level?
Normal operation
No
Yes
Increase DSP
noise cancellation
level
9.
Demonstration modes.
Demonstration mode 1
The module switches the noise cancellation
on for 1.5 seconds, then off for 1.5 seconds.
It will then move to the next level and repeat
the process. This mode is particularly
effective at demonstrating the different DSP
levels. A lternatively pass a clean audio
signal through the module to see hear how
little the DSP alters the speech.
Demonstration mode 2
The module switches the noise cancellation
on for 3 seconds then off for 3 seconds. This
is a good demonstration of the before and
after effects of the noise cancellation.
Note:
To exit the demonstration
modes hold
down
the DSP button until a
2 tone beep is
heard.
