filtering Recorded Lung Noise
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
cob
le 3 Juin 2015
Modifié(e) : Salaheddin Hosseinzadeh
le 3 Juin 2015
Hi, I'm a last year student , my final project is Analysis of Lung Sound. i've recorded an Lung sound using a electret microphone Pre-Amp an amplifier and a few filters. the sound which i recorded is Noisy and looks like :
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/150812/image.jpeg)
during last two weeks im trying to get rid of this noisy peaks , to get more smooth and noiseless sound. any suggestions ?
i think if i could follow the contour
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/150813/image.jpeg)
maybe it can get good results. i don't know how to do it.
0 commentaires
Réponse acceptée
Salaheddin Hosseinzadeh
le 3 Juin 2015
Hi,
Have you tried filtering your data, very simply with a low pass filter?
I've attached a recursive single pole low pass filter which I wrote and it's pretty fast as it's recursive.
It's also easy to use, you pass the data, sampling frequency, and the cut off frequency, it should have a manual anyways.
Give it a try and let me know if you encountered a prob.
Good luck!
3 commentaires
Salaheddin Hosseinzadeh
le 3 Juin 2015
Modifié(e) : Salaheddin Hosseinzadeh
le 3 Juin 2015
Hi,
You shouldn't have accepted my answer if it was not answering your question! I just tried the samples you attached! I tried sgolayfilt() as well as the low pass filter. I am clue less non of the worked
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/183821/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/183823/image.png)
Please have a look at Star Strider comment.
Also, I suggest you post another question, and don't accept the answers till you get what you want. You can vote for answers to show your appreciation if you want ;)
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Digital Filter Analysis dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!