How can i process a csv file to generate a waveform and then do noise removal

Question

Maidah Zahid 2019-6-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468369-how-can-i-process-a-csv-file-to-generate-a-waveform-and-then-do-noise-removal

评论： Image Analyst 2019-6-23

I made a circuit for audio amplifcation. Gave an input audio signal and observed waveform on oscilloscope. I saved the waveform in .csv format. I have to process the .csv in software to remove noise from signal. Where do i start? Is it possible to convert csv to wav in matlab?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Image Analyst 2019-6-23

make_wav_file.m

Unfortunately you forgot ot attach your csv file to your question. So about all I can say to your question is "Yes, you can read in a CSV file and do some noise removal on it, and play it as a sound, and use audiowrite() to save it as a .wav format file."

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Kilian Liss 2019-6-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468369-how-can-i-process-a-csv-file-to-generate-a-waveform-and-then-do-noise-removal#answer_380333

在 MATLAB Online 中打开

First open your cvs file with notepad, and figure out what line your data begins in. So for example, in the following image the data begins at line 32

Now you may import your data using the following code. This works for any data file that you can read with notepad. Here fileLoc is the directory that your CSV file is in, ',' indicates that the data points are seperated by commas, and 32 is the line that the data begins in. The data will then be stored in a matrix named 'data'.

fileLoc = 'C:\The\loaction\that\your\file\is\in.csv';
file = importdata(fileLoc, ',', 32);
data = file.data;

For signal smoothing, please refer to the following article:

https://au.mathworks.com/help/signal/examples/signal-smoothing.html

2 个评论
显示无隐藏无

Maidah Zahid 2019-6-22

I saved athe file as a matrix. it is a 6000*2double. Can it generate a graph?

Maidah Zahid 2019-6-22

Thanks. I managed to plot a graph. But even after looking at the link you sent me I'm confused about how to process the filter. I will look through it more.

请先登录，再进行评论。