psg sounds mat to wav

hi all,

ı got psg(polysomnography) records from phsyio.net. They have a tool for extracting rec(record) to mat file. And i used it then i tried to save files as wav file. Their sampling frequencies 128hz i used wavwrite for this by Fs=128 but i couldn't listen it by matlab, goldwave or etc. goldwave has an error it can't accept a sampling rate above 1000hz so ı resampled it to 1280hz and 1000hz by matlab resample function but still same problem.

 Could anyone suggest me about saving mat file as wav.

[Image Analyst]

Attach your mat file if you want anyone to try to convert it to a wav file for you. Also give your code where you tried to convert it to a wav file.

[geem]

Sure thanks ..

first of all ı downloaded psg files the webpage below

http://www.physionet.org/physiobank/database/ucddb/#contact-information

then my codes are

y=sound;

filename='ucddb020';

Fs=128;

wavwrite(y,Fs,filename);

Answer 1

[Walter Roberson]

Is "sound" the file you loaded in? "sound" is the name of a MATLAB library call to play sounds, so you should avoid using it as the name of a variable.

Ensure that your "y" variable has one column per channel. Your psg data might be row-oriented instead of column-oriented.

Answer 2

[geem]

I changed my data name and change it as column vector then it seems like snore sound now but still i can't hear snores. And i guess it can be about sampling rate problem. Thanks for reply