You can record with less noise in the recorded sound by using the “Recording Filter” function.
tab - “Recording Filter,” and then press
.

or
to select “NCF(Noise Cut)” or “LCF(Low Cut),” and then press
.

STOP to exit the menu mode. You can select one of the menu items available.
NCF(Noise Cut):
In addition to low frequency sounds, the IC recorder cuts the noise of high frequency sounds outside the normal audio range.
LCF(Low Cut):
The IC recorder cuts low frequency noise such as projector machine sound or roaring noise from the wind, etc.
OFF:
Cancels the recording filter function.
(Initial setting)