Generate different types of audio-noise

5 次查看（过去 30 天）

Rowan Humphreys 2022-6-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1747400-generate-different-types-of-audio-noise

评论： Mathieu NOE 2022-6-29

Given a general shape of a intensity-frequency relationship, I want to be able to generate a corresponding noise .wav file. Is there a way of doing this?

I would then like to produce similar graphs for audiofiles I have recorded.

EDIT: How do I change the PSD of noise?

Thank you very much.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Rowan Humphreys 2022-6-24

Hi Mathieu - how does one shape a PSD?

Mathieu NOE 2022-6-29

Hello Rowan

see the magnitude vs frequency shape - use that to create a FIR or IIR filter using invfreqs or invfreqz, then pass a white noise (random numbers) into that "shaping" filter and you're done !

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Eamon Gekakis 2022-6-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1747400-generate-different-types-of-audio-noise#answer_992835

audiowrite might be a good solution here.

2 个评论
显示无隐藏无

Rowan Humphreys 2022-6-24

Thanks Eamon, I have been using that to save the files. I meant more specifically how do you shape the PSD of the noise?

Eamon Gekakis 2022-6-24

Generally, a transfer function or filter stack will be used to "shape" the PSD data from my understanding, a combination of peak filters, bandpass filters, notches, etc.

This may be a useful write-up on matlab filter design, using the designfilt signal processing toolbox function.

The Transfer Function matlab function may also be usefil here.

请先登录，再进行评论。

请先登录，再回答此问题。