How to "noise" the preview of an audio file?

Question

Python

Good afternoon!
The meaning of the problem is as follows. There are previews of audio files (mono, wav) lasting from 3 to 10 seconds. Mostly these are natural sounds or voices of animals. The task is to "protect" these previews by overlaying background noise, but without losing much of the opportunity to evaluate the original version. That is, so that you can listen to the preview, but it was as difficult as possible to clean from noise. Do not offer options with white or pink noise. They clean up pretty well.

Answer 1

Everything, of course, depends on the requirements for sound and on the specific content of the signal.
You can try combinations of the options:
By carefully playing with these options, you can achieve an acceptable preview quality, which at the same time will be strikingly different from the original.

Answer 2

www.voxengo.com/files/userguides/VoxengoBeeper_ru....

Answer 3

Зайдите на audiojungle и послушайте, как они реализуют защиту.