Human speech frequency band-pass filter

Figure 1$\colon$ Bandpass filter

Audio tracks may be full of noises. The noise may be caused by a bad mic, a bad mic isolation, wind, rain, etc.

Human voice frequency ranges from 300Hz to 3000Hz.

A bandpass filter can be applied to isolate the human voice frequency from noise.
A bandpass filter cuts all the noises out and keep human voices

To do so we can use ffmpeg$\colon$

ffmpeg -i <input_file> -af "highpass=f=300, lowpass=f=3000" <output_file>

[realization]

[segmentation 圖加工]