how do i seperate two different frequencies in one sound?

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Eqehan
Eqehan 2022-3-11
评论： Eqehan 2022-3-12
I have an voice record. It contains a man's speech and another dominant voice with different frequency.
How can i seperate them? Also, how can i delete jammer effect of dominant tone voice.
Ex: https://imgur.com/a/mTRfek1
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Eqehan
Eqehan 2022-3-12
I completed the project. I used Fourier Transform(fft) and Band-Pass Filter. I am sharing the codes and screenshots for community.
clear all;close all;clc; % Clear everything
[data, Fs] = audioread('sound1.wav'); % Define sound document
D= fft(data); % Fourier Transform of data of our sound
plot(real(D)); % Plot the real part of fourier transform.
I found human voice frequencies at the result of fourier transform. It is between 1500-7500Hz. So i want to take just this frequencies. Then i made an Band-Pass Filter.
Band-Pass Filter
clear all;close all;clc; % Clear everything
[data, Fs] = audioread('sound1.wav'); % Define sound document
N=128; % Order of filter
Fn = Fs/2; % Nyquist Freq
fc1 = 1500/Fn; % Cut_Off Freq 1 - 1500Hz
fc2 = 7500/Fn; % Cut_Off Freq 2 - 7500Hz
B = fir1(N, [fc1 fc2], 'bandpass'); % Band-Pass Filter
ses_filtered = filtfilt(B, 1, data); % Apply filter
sound(ses_filtered,Fs); % Play the filtered sound
audiowrite('sound_result.wav',ses_filtered,Fs); %record the new sound
So, the first subplot(2,1,1) shows my raw sound, which has noise in high frequency.
Second subplot(2,1,2) shows the result.

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