how to create speech waves with equal loudness in matlab

hi frnds i want matlab command or code for making speech waves with equal loudness in matlab i.e speech waves with same intensity and frequency.

Answer 1

[Pedro Villena]

I suggest you to use Microsoft Anna (Text to Speech) and save the sound in a *.wav file or *.mp3 file.

Then import the sound file to MATLAB.

To equalize the loudness you could try this options:

• Use the soundsc command:

 [y1,Fs1] = audioread('myRecord1.wav');
 [y2,Fs2] = audioread('myRecord2.wav');
  y1n = soundsc(y1,Fs1);
  y2n = soundsc(y2,Fs2);

• Use FFT to equalize the median dB:

 Pxx1 = abs(fft(y1));
 Pxx2 = abs(fft(y2));
 dB1 = median(10*log10(Pxx1(1:(end/2)).^2));
 dB2 = median(10*log10(Pxx2(1:(end/2)).^2));
 dB = [dB1 dB2];
 k = sqrt(10.^((max(dB)-dB)/10));
 y1n = k(1)*y1;
 y2n = k(2)*y2;

[ana]

Hey thnx for this idea. But already i have some speech waves that i want to make with equal loudness, so is there any another way to do this ?

[Pedro Villena]

Sorry, I forget to tell you how to equalize the loudness.

Options:

• Use the soundsc command:

Examples:

 [y1,Fs1] = audioread('myRecord1.wav');
 [y2,Fs2] = audioread('myRecord2.wav');
  y1n = soundsc(y1,Fs1);
  y2n = soundsc(y2,Fs2);

• Use FFT to equalize the median dB:

Pxx1 = abs(fft(y1));
Pxx2 = abs(fft(y2));
dB1 = median(10*log10(Pxx1(1:(end/2)).^2));
dB2 = median(10*log10(Pxx2(1:(end/2)).^2));
dB = [dB1 dB2];
k = sqrt(10.^((max(dB)-dB)/10));
y1n = k(1)*y1;
y2n = k(2)*y2;

Answer 2

[ana]

Thanx for your answer..