How can I convert air pressure / time data to an audio file?

Question

Lacin Sahin 2019-1-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440758-how-can-i-convert-air-pressure-time-data-to-an-audio-file

编辑： Alberto Mora 2019-1-21

TPM.txt

I have got a data set (.txt) which consist of air pressure values (in Pa, Pascals) with a sampling rate of 200. How can I write this data to an audio file (.wav)?

What I've tried is:

1- I import the data into Matlab. There are different output types. I can import it as table, column vector, numeric matrix, string array or cell array. I guess the right one is numeric matrix, so I go with that one.

2- When I do that, it imports the data set as a "double" (I'm not sure what that means either but anyway).

3- The data I have has values such as: 12.579522758541621, -8.705727330368635, 0.004533738540940603 etc. These are in Pascals. However, when I use the audiowrite command, it normalizes the values to -1 and +1, which clips the audio, and this is not what I want. I guess I have to convert these values to something else, or some different data set, or scale these values. This is the point that I get lost. The script in Matlab named "handel.mat" has a data set that has values between -1 and +1 which works very well. How can I convert my data to that data type?

Thanks!

- Lacin