The HPF provides an option for a low-latency and IIR filtering.
The main function of the HPF contains seven selectable cutoff frequencies used to filter the
unwanted low-frequency signals, such as PCB noise, coupled current noise, wind noise and
more. It is a trade-off between the speech signal quality and the noise reduction level.
Note: The default cutoff frequencies for the speaker is 300 Hz and
MIC is 210 Hz.
The following figure illustrates the interface of HPF parameters for both speaker and microphone paths in the DSP tool.Figure 4-1. Configuration of High-Pass Filter Parameter in DSP Tool
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