matlab显示wav波形图,matlab 分析wav波形

[x,fs,bits]=wavread(‘d.wav‘, [1 5000]);

% sound(x, fs, bits);

N = length(x);

n = 0 : N-1;

t = n/fs;

% x = x

y = fft(x, N);

mag = abs(y);

f = n  * fs / N;

subplot(211);

plot(t, x);

xlabel(‘Time (sec.)‘)                                 % 标注横坐标

ylabel(‘Signal Level (Volts)‘)                        % 标注纵坐标

grid on

subplot(212);

fn = 1:N/2;

plot(f(fn), mag(fn));

grid on;

axis tight;

原文：http://www.cnblogs.com/zhang-pengcheng/p/4489355.html