Sampling frequency in Matlab

10 次查看（过去 30 天）
Md. Mahmudul Hasan Shihab
编辑： Md. Mahmudul Hasan Shihab 2020-12-9
clc;close all;clear all;
%%
[signal,Fs]=audioread('Dn-10.mp3');%Signal input
in mp3 format.
sound(signal,Fs);%Fs(sampling frequency)=44100Hz.
p=length(signal);
c=fft(signal,p);%Fourier transform.
y_n=abs(c);%Magnitude of the FFT.
Phase_c=unwrap(angle(c)); %Phase of the FFT.
x_n=((0:1/p:1-(1/p))*Fs);
w=phase(1:p/2); %Half range of phase of length of signal.
g_magnitude=abs(1:p/2); %Magnitude Spectrum of the signal.
figure(1)
plot(x_n,y_n);
xlabel('Given audio signal frequency in Hz');
ylabel('Given audio signal amplitude');
title('For the given audio signal of frequency response');
xlim([0,1100]); %Bounded the signal 0 to 1100Hz in X-axis.
p=max(y_n);%Find the max value of y_n signal.
q=(y_n==p(1));
r=find(q);
Frequency=x_n(r(1))%Finding corresponding frequency value.
if(Frequency>=100 && Frequency<=325)%The observed characteristic frequency
change for the signal.
disp('The given signal command is Wait.')
else
disp('The given signal command is Go.')
end
Here is simple matlab code to match a voice signal with its input voice signal. Can anyone explain how this code is working?

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Discrete Fourier and Cosine Transforms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by