hello every body, i have a speech sample (.wav file )(!!!!this sample was clipped when it was recorded) ,i loaded into matlab using the instruction wavread('file name')
y=wavread('file name');
plot(y);
plotting y ,i obseved that the amplitude was between [-1 1];
i want to know why? and what does this range mean? what is it's equivalent in amplitude ?
was the y signal normalized or not ? can i get the clipped values of the signal that are above and below [-1 1]

If the sample was clipped when it was recorded, that means that the information that was clipped was lost.
So, no, not without violating the laws of thermodynamics, or something



Eh? [-1 1] is the amplitude.

The numeric range of a 16-bit wav file is [-32768,32767], when working in Matlab and generally when doing signal processing it is useful to change the dynamic range to [-1,1] just to simplify the process for different quantizer sizes.

thank you